If you are shortlisting the best solar design software in Italy for 2026, you are working in a market with a strong domestic software industry, a grid code written in a very specific Italian idiom, and an incentive regime that changed shape twice in five years. CEI 0-21 governs the low voltage connection, CEI 0-16 takes over at medium voltage, the GSE administers what is left of the incentive architecture, and Scambio sul Posto has been closed to new systems in favour of Ritiro Dedicato. The platform that tops our 2026 bench is SurgePV, a cloud-native all-in-one suite at US$1,299 per user per year on the 5-User Team plan, about €1,180 at €0.91 to the US dollar. It is not the cheapest tool here and we will say so more than once: five PVsyst licences cost CHF 3,500, five PV*SOL premium seats cost EUR 4,225 plus VAT, and OpenSolar’s core platform is free. But Italy is a market where the local incumbent is genuinely strong, and the section on ACCA Solarius-PV below treats it accordingly rather than waving it away. Below are the ten platforms Italian installers actually shortlist, priced in euros, with honest limitations on each including ours. You can compare SurgePV pricing before you talk to anyone in sales.
Direct answer. The best all-in-one solar design software for Italy in 2026 is SurgePV, at US$1,299 per user per year on the 5-User Team plan (US$6,495 for five seats, about €1,180 and €5,900 at €0.91 to the US dollar). It ships CEI 0-21 and CEI 0-16 compliance flags on the generated single-line diagram, financial modelling built around self-consumption plus Ritiro Dedicato rather than the retired Scambio sul Posto, e-distribuzione connection data capture, 8,760-hour module-level shading, AI 3D roof from a satellite address and white-label Italian-language proposals on every plan. If your deliverable is a computo metrico and a relazione tecnica bound into a building file, ACCA Solarius-PV is still the tool that fits the Italian practice workflow best.
This guide is written for installatori, EPCs, studi di progettazione and in-house design teams shipping five or more projects a month. We rank ten platforms on four criteria: Italian regulatory depth, engineering rigour, workflow coverage from address to signed offerta, and total cost of ownership in euros for a five-person team.
What Makes Italian Solar Design Different
Six things, and most of them break a tool built for the American or British market.
The grid connection rules are CEI 0-21 and CEI 0-16. CEI 0-21 is the reference technical rule for users connected to the low voltage distribution network, which covers residential work and most small commercial jobs. CEI 0-16 covers medium and high voltage connections, so anything above the low voltage threshold on an industrial site moves under it. Both set the protection interface behaviour, the anti-islanding logic, the voltage and frequency trip windows and the inverter conformity declarations your connection file has to carry. Above those sit CEI 64-8 for the electrical installation itself and CEI 82-25 for photovoltaic plant design practice. A single-line diagram labelled to NEC or BS 7671 conventions is not a document e-distribuzione will process, and the protection interface block is the part reviewers look at first.
Scambio sul Posto is finished for new systems and Ritiro Dedicato replaced it. For years the Italian residential financial model was built on Scambio sul Posto, a net-metering style arrangement administered by the GSE that valued exported energy at something close to a retail-linked rate. It is closed to new entrants, and new systems now sell surplus under Ritiro Dedicato, where the GSE buys exported energy at a wholesale-linked price, or through a market offtake agreement. The practical effect is large and one directional: exported energy is now worth materially less than self-consumed energy, so system sizing, battery sizing and load-shifting advice all change. Any tool still modelling an Italian residential job as though export and consumption are worth the same number is overstating the payback.
The Superbonus era shaped what customers expect. The Superbonus at 110 percent, and the Ecobonus and Bonus Casa detrazioni that sat alongside it, drove a construction boom and trained a generation of Italian homeowners to expect a headline deduction and a sconto in fattura or cessione del credito mechanism that meant they paid very little up front. That regime has been progressively wound down and the assignment mechanisms restricted. The residual detrazione routes are far less generous, which means your proposal now has to sell a payback rather than a near-free installation. Software matters here because the financial page is doing persuasive work it did not have to do in 2021, and a tool that cannot show self-consumption rate, battery contribution and a clean cash flow will lose deals that a spreadsheet would have won three years ago.
Comunità Energetiche Rinnovabili are a genuinely different modelling problem. A CER is a legal entity whose members produce and consume renewable energy within the area served by the same primary substation, and the incentive is paid on the energy that is shared, meaning the hourly overlap between what members produce and what members consume, not on what is exported to the wider grid. That makes the design question completely different from a single-site job. You are optimising the hourly coincidence of a production profile against a portfolio of member load profiles, and adding a kilowatt in the wrong place raises export and earns nothing. This is where most international design tools simply have no concept to map onto, and it is the fastest growing segment of the Italian market.
Terna and e-distribuzione sit on either side of your connection. Terna operates the national transmission grid and publishes the dispatch and system data that everything else keys off. e-distribuzione is by far the largest distribution operator, so most connection requests, the preventivo di connessione and the eventual TICA acceptance run through its portal, with a set of smaller DSOs covering specific territories. Your design pack should capture the data those submissions need at design time.
Snow, wind and seismic loads come from NTC 2018. The Norme Tecniche per le Costruzioni set the load framework, and Italy has one of the widest internal spreads in Europe. An alpine roof in Alto Adige carries a snow load that would be absurd in Sicily, coastal wind zones are aggressive, and seismic classification varies sharply from the Po valley to Calabria. Roof anchoring and ballast plans are not transferable between them.
Irradiance is not one number either. Southern Italy and the islands see annual specific yields that comfortably clear 1,500 kWh per kWp, while alpine and northern inland sites sit far lower with materially different winter behaviour and, in the mountains, real snow cover losses. A tool that treats Italy as one climate will misprice both ends of the country.
📘 Regulation note
Per the GSE and ARERA, an Italian PV system connects under CEI 0-21 at low voltage or CEI 0-16 at medium voltage, is installed to CEI 64-8, is requested through the distributor's connection process (in most of the country e-distribuzione), and sells any surplus under Ritiro Dedicato or a market contract now that Scambio sul Posto is closed to new systems. Confirm the current Ritiro Dedicato and CER incentive parameters on the GSE portal before you put a number in a proposal, because they are revised.
Bring one of your own sites to a free SurgePV demo. We will build the 3D roof from a satellite address, run the 8,760-hour shading simulation, and hand you the SLD, BOQ and branded proposal on the call.
Book a free SurgePV demo → Compare pricingWhy Italian Firms Stay on Solarius-PV and PVsyst
This is the section most sponsored roundups skip. In Italy the two tools with real standing are ACCA Solarius-PV, made in Montella by the largest Italian construction software house, and PVsyst from Switzerland. Neither holds its position out of inertia.
Solarius-PV fits the Italian document as well as the Italian rule. Italian technical practice produces a specific bundle: the relazione tecnica, the schema elettrico, the computo metrico estimativo priced against a regional prezzario, and the documentation set that goes into a building file. ACCA’s whole product line is built around that bundle, and Solarius-PV inherits it. The computo metrico integration is the single feature that keeps Italian studi on the product, because it turns a design into a priced bill of quantities using the price list the client’s engineer expects to see. No international cloud tool replicates that, ours included, and pretending otherwise would be dishonest.
PVsyst is what the money asks for. On financed commercial and utility work, the technical adviser to a bank or a fund names PVsyst. Its near-shading model, horizon handling and documented loss tree are the reference, and a P50 and P90 out of PVsyst needs no explanatory call. That is a real competitive advantage and it is the strongest argument against switching on bankable work.
Licence economics suit small studi. A two person studio can buy an ACCA licence with an update service rather than a per seat cloud subscription that scales with headcount. Over five years, for a stable small team, that is often the cheaper route.
Where they genuinely lose. Both are Windows desktop tools. Neither gives you a customer-ready white-label offerta a sales person can send without rework. Neither offers live collaboration between an office designer and someone standing on a roof in Bergamo. PVsyst does no design workflow in the sense an installatore means it, and no Italian incentive modelling at all. And neither ships satellite-derived 3D roof capture or an AI assistant, so the first twenty minutes of every job stays manual.
The honest conclusion: if your deliverable is a bankable yield report, PVsyst stays in your stack whatever else you buy. If your deliverable is a building file with a computo metrico, Solarius-PV is hard to displace. If your deliverable is a designed, priced and closed rooftop job at volume, a cloud platform that bundles the proposal is where the hours come back. Plenty of Italian firms run two of these, and that is a reasonable answer.
Get your sizing sanity-checked. For a fast independent second opinion on system size and payback before you commit to a design, run the numbers through our free solar calculator or talk to our engineering team.
The 4-Point Italy Bench Test
This is the framework we use internally before deploying any design platform on our own solar EPC work. Each tool scores 1 to 10 on four axes, out of 40. We do not deploy anything below 32.
- Italian regulatory depth. CEI 0-21 and CEI 0-16 labelling on the generated SLD including the protection interface, CEI 64-8 and CEI 82-25 practice, GSE Ritiro Dedicato modelling, CER shared-energy logic, e-distribuzione connection data capture.
- Engineering rigour. 8,760-hour module-level simulation, P50, P75 and P90 outputs in the format Italian lenders typically ask for, NTC 2018 snow, wind and seismic inputs to the mounting design, and low-temperature Voc string sizing for alpine sites.
- Workflow coverage. Address to CEI-labelled SLD to computo or bill of quantities to branded Italian-language offerta in one licence, with DXF or DWG export for the strutturista.
- Total cost of ownership in euros. Licence plus update service plus add-ons plus onboarding time, per finished project, across a five-person team.
Scores across the ten platforms: SurgePV 36, ACCA Solarius-PV 34, PVsyst 31, PVSOL premium 32, Ampere Professional 27, HelioScope 28, Blumatica Fotovoltaico 26, OpenSolar 28, Aurora Solar 26, PVcase 25. PVsyst, PVSOL and OpenSolar all score above SurgePV on the cost axis, because CHF 700 a year, EUR 845 a year and a free core platform are each cheaper than a US$1,299 seat. The scoring is ours and it is opinionated. A two point gap between SurgePV and Solarius-PV is not a gap that justifies retraining a studio whose entire deliverable format is ACCA-shaped.
Top 10 Solar Design Software in Italy Compared
Pricing below is 2026 and quoted in each vendor’s own billing currency, with euro conversions at approximately €0.91 per US dollar where they help. Treat converted figures as indicative and confirm with the vendor.
| # | Platform | Price (vendor currency) | Key capability | Best for |
|---|---|---|---|---|
| 1 | SurgePV | US$1,299/user/yr, 5-User Team (about €1,180) | All-in-one design, 8,760-hr simulation, CEI-labelled SLD, Italian proposals | Installatori and EPCs doing 5+ projects a month |
| 2 | ACCA Solarius-PV | Base licence price not publicly listed; ACCA lists Temporary Soft rental at €49/month and the POWER PACK upgrade at €599 | Computo metrico and relazione tecnica integration | Italian studi di progettazione and geometri |
| 3 | PVsyst | CHF 700/user/yr Professional | Reference-grade simulation physics | Bankable reports, due diligence, utility scale |
| 4 | PV*SOL premium | EUR 845/named user/yr + VAT | Best 3D shading walkthrough for client meetings | Design-led firms selling on visuals |
| 5 | Electro Graphics Ampere Professional | Not publicly listed, quote only | CEI 64-8 electrical calculation and Italian schemi | Electrical designers producing the connection file |
| 6 | HelioScope | US$159/mo Basic (US$1,620/yr), US$259 Pro | Bankable C&I yield simulation | Consultancies on commercial rooftops |
| 7 | Blumatica Fotovoltaico | €250 perpetual licence, update contract extra | Low-cost Italian design plus documentation output | Small studi on a tight software budget |
| 8 | OpenSolar | Core platform free; API Access and Connectors chargeable from 16 Apr 2026, rates not published | Free design tier | Solo installers under 3 designs a month |
| 9 | Aurora Solar | US$135/user/mo Basic, US$220 Premium, billed annually | Deepest residential design and sales workflow | Multinationals with an existing Aurora process |
| 10 | PVcase | Not publicly listed, quote only | Terrain-aware ground-mount layout in CAD | Agrivoltaico and ground-mount developers |
The honest read: positions 1 through 5 are what an Italian firm actually chooses between. Positions 6 through 10 are specialists or imports. Aurora at nine is a strong product ranked low for one reason only, which is that it has almost no Italian regulatory layer.
1. SurgePV
What it does best. SurgePV runs the whole motion in one licence: satellite address to AI-generated 3D roof, 8,760-hour module-level shading, string sizing, CEI-labelled single-line diagram with the protection interface represented, bill of quantities, financial model and white-label offerta in Italian. For Italy specifically, the financial engine separates self-consumed energy from exported energy and prices the export side on a Ritiro Dedicato basis rather than assuming a net-metering credit, which is the single most common modelling error in Italian proposals written on imported software. It handles battery sizing against a real hourly load profile, which is what actually moves the payback now that export is worth less. Clara AI takes instructions in Italian, for example “progetta un impianto da 15 kWp, falda a sud, inclinazione 30 gradi, con accumulo da 10 kWh”.
Pricing. US$1,299 per user per year on the 5-User Team plan, so US$6,495 for five seats, about €1,180 per seat and €5,900 for five. Individual seats are US$1,899 a year, about €1,730. Enterprise is quoted. Free trial, no credit card. Said plainly: this costs more than five PVsyst licences at CHF 3,500 and more than five PV*SOL premium seats at EUR 4,225 plus VAT. The difference buys the bundled offerta, the Ritiro Dedicato modelling and the cloud workflow, not a lower price.
Who it suits. Installatori and EPCs doing five or more designs a month, teams bidding residential alongside commercial rooftops, and firms whose current stack is Solarius-PV plus PVsyst plus a separate document tool for the offerta.
Honest limitations. Four real ones, and in Italy two of them bite hard. There is no computo metrico estimativo priced against a regional prezzario, so a studio that has to deliver one still produces it in ACCA or in a spreadsheet, and that is the strongest single reason an Italian practice would not switch. CER modelling is partial: SurgePV will model member production and self-consumption site by site, but it does not yet run a portfolio-level shared-energy optimisation across all members of a community inside one primary substation area, so community designers still do that arithmetic outside the tool. Brand recognition is thin, because SurgePV launched in 2025 and an Italian bank’s technical adviser has never seen its report format where a PVsyst output needs no introduction. And it prepares the connection data rather than submitting to the e-distribuzione portal on your behalf.
Book a SurgePV demo and bring a real Italian job, ideally one with a battery and a genuine self-consumption question, so you can judge the Ritiro Dedicato modelling on your own numbers.
2. ACCA Solarius-PV
What it does best. ACCA is the dominant technical software house in Italian construction, and Solarius-PV inherits the whole ecosystem. It designs the array, sizes the strings, checks the inverter match, produces the schema elettrico, generates the relazione tecnica, and then hands the design to the computo metrico so the job comes out as a priced bill of quantities against a regional price list. That last step is the reason it holds the Italian market. Its verification output is written in the vocabulary Italian reviewers read, and it slots into the BIM and building-file workflow that ACCA customers already run for everything else on the project.
Pricing. ACCA does not publish a headline price for the standard Solarius-PV licence and asks you to contact its sales office. What it does publish is the Temporary Soft rental, an extra licence without a hardware key at €49 a month for as long as you want it, updates, support and training included, and the Solarius-PV POWER PACK upgrade at €599. Bundled with other ACCA products the per-tool cost drops, but you will need a written quote to know by how much.
Who it suits. Studi di progettazione, geometri, periti industriali and engineering practices whose deliverable is a document set inside a building file rather than a sales proposal.
Honest limitations. Windows desktop, so no real-time collaboration and nothing usable from a phone on site. The customer-facing proposal is a technical document, not a sales artefact, and firms that sell to homeowners usually rebuild it. There is no AI assistant and no satellite-derived 3D roof capture, so the geometry stage is manual. Shading handling is competent but not at PV*SOL’s level for complex roofscapes. And the product is Italian by design, which is exactly right until you take on a job in another country.
3. PVsyst
What it does best. PVsyst is the reference simulation engine, and on financed Italian work it is what the technical adviser names. Near-shading, horizon handling, the documented loss tree and parametric studies remain the benchmark that everything else is measured against, ours included. On lender-specified bankability it beats SurgePV and we are not going to pretend otherwise.
Pricing. CHF 700 per user per year for the Professional annual subscription, so CHF 3,500 for five licences before the 5 to 20 percent group discount. Education is CHF 420, Training and Research CHF 560, Student and Classroom CHF 25, and PVsystCLI CHF 3,000. It is a subscription, not a perpetual licence.
Who it suits. Technical due diligence teams, independent engineers, and utility and agrivoltaico developers whose deliverable is a yield report rather than a customer offerta.
Honest limitations. Windows desktop, a steep learning curve, no design workflow in the installer sense, no proposals, no CRM, no CEI documentation output and no Italian incentive modelling whatsoever. It is a physics tool, not a business tool. Our PVsyst alternative guide sets out where the tradeoff actually sits.
4. PV*SOL premium
What it does best. Valentin Software’s 3D shading walkthrough is the best customer-facing shading explanation in any tool on this list, and it travels well into Italy because Italian housing stock throws exactly the sort of awkward geometry it handles gracefully: tiled pitched roofs, chimneys, neighbouring buildings on narrow streets and courtyard shading in dense historic centres. Its component database is deep and its inverter matching is careful.
Pricing. PVSOL premium is EUR 845 per named user per year plus VAT, so EUR 4,225 for five seats, which is less than five SurgePV seats. The standard PVSOL product is EUR 585. Valentin Software moved to user-based subscription on 19 November 2024; perpetual licences bought before that date remain usable indefinitely, but maintenance renewals for them ended on 1 October 2024.
Who it suits. Design-led Italian firms that win work in the client meeting and need a visual shading story, especially in the north where German product familiarity is highest.
Honest limitations. No Italian regulatory layer to speak of: no CEI 0-21 labelling, no Ritiro Dedicato modelling, no CER concept and no computo metrico. Windows desktop only, no collaboration, no AI, no satellite roof capture, and the proposal output needs rework before a customer sees it.
5. Electro Graphics Ampere Professional
What it does best. Ampere is an Italian electrical design and calculation package built around CEI 64-8, and it is the tool a lot of Italian electrical designers already own for non-solar work. It sizes conductors and protections, verifies short circuit and selectivity, and produces schemi elettrici in the Italian drawing conventions that reviewers expect. When the bottleneck in your process is the electrical documentation attached to the connection request rather than the yield estimate, this is the practical answer.
Pricing. Not publicly listed. Electro Graphics publishes no price for Ampere or Ampere Professional and routes buyers through a demo request, so budget it only against a written quote.
Who it suits. Electrical designers and periti who produce the connection file, especially on commercial jobs landing under CEI 0-16.
Honest limitations. It is an electrical calculation tool, not a PV design platform. No 8,760-hour simulation of the quality a lender expects, no shading model worth the name, no financial modelling, no proposal. You will run it alongside something else, not instead of something else.
6. HelioScope
What it does best. Module-level 8,760-hour simulation for commercial and industrial roofs with a clean loss tree, and an output that Italian independent engineers and international funds accept without argument. For a 700 kW capannone roof in Emilia-Romagna it is defensible.
Pricing. US$159 a month on Basic (US$1,620 a year) and US$259 on Pro (US$2,640 a year), each covering one user and 10 projects a month, with DC design caps of 1.25 MW and 5 MW. Five Basic seats come to US$8,100 a year, roughly €7,400. HelioScope is Aurora-owned.
Who it suits. Consultancies and commercial-only teams whose deliverable is a yield report.
Honest limitations. No Italian regulatory layer at all, no CEI labelling, no GSE or Ritiro Dedicato modelling, no CER logic, no AI 3D roof, and weak proposal tooling that forces a second licence. Read our HelioScope alternative guide before committing five seats.
7. Blumatica Fotovoltaico
What it does best. Blumatica is another Italian technical software house, and its photovoltaic module covers the same ground as Solarius-PV at a lower price point: sizing, electrical verification, documentation and the paperwork an Italian job generates. For a small studio that needs Italian-shaped output and cannot justify a full ACCA subscription, it is a sensible value pick, and it usually comes bundled with the energy certification and safety documentation tools the same practice needs anyway.
Pricing. €250 for the Blumatica Impianti Fotovoltaici licence, which the vendor sells as a licenza perpetua rather than an annual seat. Technical and regulatory updates are a separate annual or three-year update contract, priced on top. Bundles with the other Blumatica tools start at €299.
Who it suits. Small Italian practices, single-person technical offices, and firms where PV is a minority of the workload.
Honest limitations. Shallower than ACCA on both simulation and integration, thin 3D capability, no cloud collaboration, no sales-grade proposal, and an interface that assumes you already know Italian technical practice. It is a competent document generator rather than a design environment.
8. OpenSolar
What it does best. A free design tier with polished residential templates and a short learning curve. For a one-person installer doing two or three jobs a month, price is a hard argument to beat.
Pricing. The core platform is free. From 16 April 2026 OpenSolar charges for API Access, billed per project on creation, and for Connectors, billed as a flat monthly fee, but it has not published the rates and they vary by region.
Who it suits. Solo installers and new entrants who need working proposals without a licence commitment.
Honest limitations. Italian regulatory support is shallow, the default financial assumptions are built for net-metering markets and need overriding for Ritiro Dedicato, and there is no bankable output for financed commercial work. On price it beats every paid tool on this list including ours, and until the 2026 API and Connector rates are published nobody can say what an Italian team will pay beyond zero for the core platform. See our OpenSolar alternative analysis.
9. Aurora Solar
What it does best. The deepest residential design and sales workflow in the English-speaking market, with mature roof plane detection and excellent customer-facing presentation. If your group already runs Aurora elsewhere, standardising has real value.
Pricing. Basic is US$135 per user per month billed annually (US$1,620 a year, or US$159 month to month) and Premium is US$220 billed annually (US$2,640 a year, or US$259 month to month), each covering one user and 50 projects a month. Enterprise is custom. Five seats therefore run US$8,100 a year on Basic and US$13,200 on Premium, roughly €7,400 to €12,000. LIDAR modelling, bankable shade reports and battery modelling are Premium only, and plan sets are a separately priced service rather than a plan inclusion, with site models from US$9.99.
Who it suits. Multinational installers extending an existing Aurora process into Italy.
Honest limitations. Essentially no Italian regulatory layer: no CEI labelling, no GSE modelling, no CER concept, no Italian document conventions. Per-seat monthly pricing scales painfully on a growing team. See our Aurora Solar alternative comparison.
10. PVcase
What it does best. Terrain-aware ground-mount layout inside AutoCAD, which matters on Italian ground-mount and agrivoltaico sites where slope, irregular parcel boundaries and the row spacing needed to keep crops viable underneath all drive the layout.
Pricing. Not publicly listed. PVcase is quote only and requires an AutoCAD licence on top; any per-seat figure circulating in software directories is an unverified third-party estimate.
Who it suits. Agrivoltaico and ground-mount developers, particularly in the south where the large project pipeline sits.
Honest limitations. No rooftop or residential relevance, no proposal workflow, no Italian code library, and it assumes an AutoCAD-competent operator. Most readers of this article are outside its target market.
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Pricing in Euros for a Five-Person Team
Prices are shown in the vendor’s own billing currency. Euro figures marked approximate use €0.91 to the US dollar and a roughly one-to-one Swiss franc to euro rate.
| Platform | Entry | Mid | Five seats per year | What is bundled |
|---|---|---|---|---|
| SurgePV | US$1,899/user/yr Individual | US$1,299/user/yr (5-User Team) | US$6,495 (about €5,900) | CEI-labelled SLD, Ritiro Dedicato modelling, AI 3D, 8,760-hr, BOQ, DXF/DWG, Italian proposals |
| OpenSolar | Free | Free core platform | €0 for the core platform; 2026 API and Connector rates not published | Free residential design, chargeable API and Connectors from 16 Apr 2026 |
| Blumatica Fotovoltaico | €250 perpetual licence | Bundles from €299 | €1,250 one-off for five licences, plus an unpublished update contract | Italian documentation and sizing |
| ACCA Solarius-PV | €49/month Temporary Soft rental | POWER PACK upgrade €599; base licence not publicly listed | €2,940 a year if five people rent at €49/month; purchase price not publicly listed | Design, schema elettrico, relazione tecnica, computo metrico |
| PVsyst | CHF 700/user/yr | n/a | CHF 3,500 before group discount | Simulation only |
| Ampere Professional | Not publicly listed | Not publicly listed | Not publicly listed | CEI 64-8 electrical calculation and schemi |
| PV*SOL premium | EUR 585 standard PV*SOL | EUR 845/named user/yr + VAT | EUR 4,225 + VAT | Desktop simulation, 3D shading, weak proposals |
| HelioScope | US$159/mo Basic (US$1,620/yr) | US$259/mo Pro (US$2,640/yr) | US$8,100 on Basic (about €7,400) | Engineering depth, weak proposals |
| Aurora Solar | US$135/user/mo Basic annually (US$1,620/yr) | US$220 Premium annually (US$2,640/yr) | US$8,100 Basic, US$13,200 Premium | Residential workflow, no Italian layer |
| PVcase | Not publicly listed | Not publicly listed | Not publicly listed | Ground mount CAD only |
Read that table honestly and SurgePV sits in the upper half on price. Five PVsyst licences at CHF 3,500 and five PV*SOL premium seats at EUR 4,225 both come in under SurgePV’s US$6,495, Blumatica and ACCA are cheaper again, and OpenSolar’s core platform costs nothing. The comparison an Italian firm should actually run is SurgePV against the classic stack of Solarius-PV for the document set, plus PVsyst for the yield report, plus a separate tool for the offerta. On a five person team the published parts of that legacy stack come to about €2,940 a year if five people rent Solarius-PV at €49 a month, plus five PVsyst licences at CHF 3,500, which is roughly €3,750, so near €6,700 before you add anything for the offerta and before ACCA quotes you for outright purchase. Three sets of logins and no shared project state come with it. ACCA’s ongoing cost is genuinely low, so a stable two person studio will find the legacy route cheaper outright. Team size and whether you need a computo metrico are what flip the arithmetic.
Modelling a Comunità Energetica Rinnovabile Properly
This deserves its own section because it is where the Italian market is growing and where almost every tool is weak.
In a CER the incentive attaches to shared energy, defined as the hourly minimum of what community members produce and what community members consume, inside the area served by the same primary substation. The physical electricity still flows through the public grid and every member keeps their own supply contract. What changes is that a euro of value is created only when production and consumption line up in the same hour and inside the same perimeter.
Three consequences for design.
Sizing is a portfolio problem, not a site problem. The right array size on a member roof depends on the aggregate load shape of the community, not on that member’s own consumption. A school roof that would be oversized for the school alone can be exactly right if the community includes a supermarket and forty apartments.
Hourly resolution is mandatory. Monthly energy balances tell you nothing about coincidence. You need 8,760-hour production against 8,760-hour member consumption, and most member load data arrives as low resolution billing history that has to be profiled before it is usable.
Perimeter checks come first. Membership is bounded by the primary substation area, so a member who looks geographically close may be outside the perimeter. That check happens before any design work, and getting it wrong invalidates the whole model.
Practically, in 2026 most serious Italian CER work is done with a design tool for the physical arrays and a separate energy-sharing model, often built in-house or bought from a specialist CER platform, for the portfolio arithmetic. No general purpose PV design tool on this list, ours included, does the whole job. If a vendor tells you otherwise on a sales call, ask them to model a twenty member community with mixed load profiles in front of you.
Italian Design Details Most Software Gets Wrong
Three specifics decide whether an Italian design survives contact with reality.
Export is worth less than self-consumption, and the gap is the whole business case. With Scambio sul Posto closed to new systems, exported energy earns a wholesale-linked Ritiro Dedicato price while self-consumed energy avoids a retail bill including network charges and taxes. The ratio between those two numbers is what justifies a battery, an east-west layout, or a smaller array than the roof could physically hold. Software that shows a single blended value per kWh hides the most important decision on the job.
NTC 2018 loads are regional inputs, not defaults. Snow load in the alpine arc is in a different universe from Sicily, coastal wind zones are severe, and seismic classification varies widely down the peninsula. The same rail spacing and ballast plan is not valid in Bolzano and in Bari. If your tool uses one national default the strutturista will redo the work, and on a historic building the soprintendenza may have views on the anchoring detail as well.
Low-temperature Voc catches alpine jobs. String open-circuit voltage rises as temperature falls, and a design low of minus 15 Celsius or colder in the Dolomites pushes a string sized at 25 Celsius past the inverter’s maximum DC input. It passes in September and over-volts in January. Our sister engineering team covers the arithmetic in their solar inverter sizing guide.
⚠️ Watch out
Check every incentive line in an inherited offerta template. Superbonus-era assumptions, cessione del credito and sconto in fattura mechanics, and Scambio sul Posto revenue all persist in old templates long after the rules changed. Verify the current detrazione percentage and the current Ritiro Dedicato and CER parameters on the GSE and Agenzia delle Entrate sites before a number reaches a customer.
Mistakes Italian Installers Make Choosing Design Software
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Modelling export as if Scambio sul Posto still applied. It is closed to new systems. Exported energy now earns a wholesale-linked Ritiro Dedicato price, which is a much smaller number, and a proposal built on the old assumption overstates the payback.
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Buying a cloud tool and still needing a computo metrico. If your client expects a bill of quantities priced against a regional prezzario, no international platform gives you one. Decide whether you are replacing ACCA or supplementing it before you sign anything.
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Assuming a CER can be modelled with a normal site tool. Shared energy is an hourly coincidence calculation across a member portfolio inside one primary substation area. A per-site design tool cannot express it, and a community sized as a set of independent sites will underperform its business plan.
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Using one climate and one load zone for the whole country. Specific yield, snow load, wind zone and seismic classification all vary enormously between the alpine north and the south. National defaults produce designs that are conservative in Puglia and unsafe in Alto Adige.
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Leaving the protection interface off the single-line diagram. CEI 0-21 and CEI 0-16 reviewers look for it first. A drawing generated to a foreign convention will come back, and each round trip costs a week of connection timeline.
These patterns are not Italy-specific in kind, only in detail. Our writeup on common mistakes EPC companies make in rooftop solar covers the wider set.
Should an Italian Installer Standardise on SurgePV?
- ✓ You design 5+ Italian projects a month
- ✓ Self-consumption and battery sizing decide your deals
- ✓ Designers and sales need the same live project file
- ✓ Your current three-tool stack exceeds €9,000 a year
- ✗ Your deliverable includes a computo metrico (ACCA)
- ✗ Your deliverable is a bankable yield report (PVsyst)
- ✗ Your bottleneck is the CEI 64-8 electrical file (Ampere)
- ✗ You develop agrivoltaico on sloped land (PVcase)
Verdict. For a five-person Italian installer covering residential and commercial rooftops, SurgePV wins on bundled scope and total cost of ownership in euros. For a studio whose output is a building file with a priced computo metrico, Solarius-PV stays, and the sensible move is to add a cloud tool for the sales side rather than replace the document engine.
How Heaven Green Energy and SurgePV Help Italian Teams
Heaven Green Energy has delivered more than 10,000 solar installations, and our engineering group builds the software we use ourselves. SurgePV came out of that: a design suite written by people who had to produce inspection-ready drawings on deadline. For Italian teams the entry points are:
- Shadow analysis for 8,760-hour module-level shading on dense urban roofscapes.
- Structural and civil engineering for NTC 2018 snow, wind and seismic verification on the mounting system.
- Rooftop detailed engineering design when you need a full drawing package produced by a dedicated team.
- A low-temperature Voc sanity check before any alpine string design leaves the office, because that is the failure mode that shows up in January rather than at commissioning.
If you also run projects outside Italy, our commercial solar and industrial solar pages set out how the same design stack carries across markets. Broader market context sits with the IEA renewables tracker, IRENA country profiles and Terna’s Italian electricity statistics.
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Frequently Asked Questions
What is the best solar design software in Italy in 2026?
SurgePV ranks first on our 4-point Italy bench with 36 of 40, at US$1,299 per user per year on the 5-User Team plan (about €1,180), because it bundles CEI-labelled output, Ritiro Dedicato aware financial modelling, 8,760-hour simulation and an Italian-language offerta in one cloud licence. ACCA Solarius-PV scores 34 and remains the right answer for a studio whose deliverable includes a computo metrico, and PVsyst stays in the stack of anyone producing bankable yield reports.
Is Scambio sul Posto still available for new solar systems?
No. Scambio sul Posto is closed to new entrants, and new systems sell surplus energy under Ritiro Dedicato, where the GSE buys exported energy at a wholesale-linked price, or through a market offtake contract. The practical consequence is that self-consumed energy is now worth considerably more than exported energy, which changes optimal system size, strengthens the case for storage, and makes any financial model built on the old scheme too optimistic.
What is the difference between CEI 0-21 and CEI 0-16?
CEI 0-21 is the reference technical rule for users connected to the low voltage distribution network, so it governs residential systems and most small commercial ones. CEI 0-16 covers medium and high voltage connections and takes over on larger industrial and utility sites. Both define the protection interface, anti-islanding behaviour and the trip settings, and both require conformity documentation for the inverter. Your single-line diagram must show the protection interface explicitly.
Why is ACCA Solarius-PV so dominant in Italy?
Because it fits Italian building practice rather than only Italian electrical rules. Solarius-PV produces the relazione tecnica and schema elettrico and then feeds the design into ACCA’s computo metrico so the job comes out as a bill of quantities priced against a regional prezzario. That is the document an Italian client’s engineer expects. No international cloud platform, including SurgePV, replicates the computo metrico step, which is why many Italian studi keep ACCA even after buying a cloud design tool.
How do you model a Comunità Energetica Rinnovabile?
The incentive is paid on shared energy, the hourly overlap between what members produce and what members consume within the area served by the same primary substation. That makes sizing a portfolio problem rather than a per-site problem, requires 8,760-hour production and consumption data for every member, and depends on a perimeter check before any design work starts. Most Italian teams in 2026 use a PV design tool for the arrays and a separate energy-sharing model for the community arithmetic.
Does the Superbonus still apply to solar installations?
The 110 percent Superbonus regime has been wound down and the credit assignment mechanisms restricted, so the generous era it created is over. Lower-rate detrazione routes for building work and energy efficiency continue, but the headline percentage and the payment mechanics are materially different. Check the current position with the Agenzia delle Entrate before quoting, and expect to sell a genuine payback rather than a near-free installation.
Which structural standard governs solar mounting in Italy?
The Norme Tecniche per le Costruzioni, NTC 2018, set the snow, wind and seismic framework. Italy’s internal spread is very wide: alpine snow loads, aggressive coastal wind zones and seismic classifications that vary sharply down the peninsula. A rail spacing and ballast plan valid in Sicily is not valid in Alto Adige, and on historic buildings the anchoring detail may also attract heritage scrutiny.
What is SurgePV’s biggest weakness for Italian installers?
The missing computo metrico estimativo. If your client expects a bill of quantities priced against a regional prezzario, SurgePV does not produce one and you will keep ACCA alongside it. Its CER support is also partial, covering per-site production and self-consumption but not portfolio-level shared-energy optimisation across a whole community. Add thin brand recognition with Italian banks compared to PVsyst, and the fact that it prepares e-distribuzione connection data rather than filing it for you.
Stop paying for four tools. Design it all in one.
SurgePV replaces Aurora + HelioScope + PVsyst + a separate proposal tool in a single license. AI 3D roof in under 60 seconds, bankable 8,760-hour simulation, auto-SLD, BOQ, DXF/DWG export and branded proposals.
Free trial, no credit card · $1,299 per user per year on the 5-User Team planDisclaimer: SurgePV is our own product. It is built by the Heaven Group, the same company as Heaven Green Energy, so treat this as a recommendation from its maker.