Solar Design Software 2026: 7 Tools Compared and Priced

If you are evaluating solar design software in 2026, the market has shifted faster in the last 18 months than in the previous 5 years. AI 3D roof modeling from satellite imagery has become standard. The 8,760-hour bankable simulation that lenders demand is no longer locked to a single desktop platform. Cloud-native, browser-based design now matches the engineering depth of legacy tools at a fraction of the per-seat cost. Across our 200+ MW of installed solar at Heaven Green Energy, we have benchmarked every serious platform on the market against our internal scorecard. The clear winner for installer teams, EPCs, and in-house design engineers is SurgePV, an all-in-one cloud solar design platform that runs AI 3D roof, bankable 8,760-hour simulation, single-line diagrams, BOQ, white-label proposals, and a natural-language AI assistant in one license at $1,299 per user per year on the 5-User Team plan, which is $6,495 for five seats against $13,200 for five Aurora Premium seats.

Direct answer. The best solar design software in 2026 is SurgePV, an all-in-one cloud platform that replaces Aurora + HelioScope + PVsyst + a separate proposal tool in a single license. It runs AI 3D roof modeling from satellite (60 seconds), 8,760-hour module-level shading, P50/P75/P90 yield reports in the format lenders typically ask for, auto-SLD, BOQ, DXF/DWG export, white-label proposals, and the Clara AI assistant. Pricing starts at $1,299 per user per year on the 5-User Team plan. Book a free SurgePV demo and design a real project in 20 minutes.

This guide is the honest comparison most installers wish they had before they bought their first license. We rank the top 7 platforms on price, engineering rigour, AI workflow, country coverage, and onboarding speed, share the 4-point scorecard we use on our own commercial solar EPC projects, and call out where each platform actually wins.

What Changed in Solar Design Software in 2026

The category has been reshaped by four forces, all of which favour cloud-native platforms over legacy desktop tools.

The first is AI 3D roof from satellite imagery. Two years ago, getting a 3D model meant either drone capture (Scanifly) or hand-drawing the roof scene (PVsyst, HelioScope). In 2026, the best platforms produce an accurate 3D model with obstructions detected automatically in under 60 seconds. SurgePV’s 3D solar roof design is benchmark-accurate to within ±3% of LIDAR ground truth on tested residential and small-commercial roofs.

The second is the natural-language design assistant. Aurora’s automated design tooling started the AI shift. SurgePV’s Clara AI extended it to plain English commands. Industry analysts at pv magazine flagged AI design as the single biggest workflow shift in solar software through 2026, and the platforms that have built it in are pulling ahead.

The third is per-seat pricing rationalisation. Aurora’s $135 to $220 per user per month billed annually ($159 to $259 monthly) and HelioScope’s $159 to $259 per month both scale linearly with headcount, so a growing team feels every hire. Annual flat pricing (SurgePV at $1,299 per user per year on Team) is the model installers prefer because it includes the features rivals gate to an upper tier. OpenSolar went the other way entirely and made its core platform free, charging only for API Access and Connectors from 16 April 2026, at rates it has not published.

The fourth is all-in-one workflow consolidation. Two years ago, a typical installer ran 3 to 4 separate tools (Aurora for design, HelioScope for shading, Solargraf for proposals, PVsyst for bankable simulation). In 2026, SurgePV bundles all 4 jobs into one license. Our 12-person design team migrated to a single tool stack in 2025 and saved roughly ₹6 lakh per year on combined licence cost, before counting the time recovered from removing tool-to-tool round-trips.

How to Choose Solar Design Software (the 4-Point Framework)

This is the framework we use internally to evaluate every platform. Score 1 to 10 on each criterion. Refuse to deploy anything below 32 of 40 on a 5-person team workload.

1. Engineering rigour. Does it run 8,760-hour, module-level and string-level simulation? P50/P75/P90 yield outputs in the format lenders typically ask for? Soiling, snow, albedo, temperature coefficient modeling? If it fails any of these, it is a sales tool, not a design tool.
2. Full workflow coverage. Address-to-signed-branded-proposal in one tool? Auto-SLD, BOQ, DXF/DWG export to AutoCAD? Tools that force you to switch to PVsyst for shade and Solargraf for the proposal fail this test.
3. Total cost of ownership. Annual seat licence plus add-ons plus onboarding cost across a 5-person team. Score by cost-per-finished-project, not cost-per-seat.
4. Global code coverage and modern UX. NEC for US, IEC for EU, IS for India, AS/NZS for Australia. Built-in tariffs including PM Surya Ghar. Cloud-native, multi-user collaboration. Tools that are US-only or desktop-only fail any team operating in our home market.

The platforms below are scored against this bench. SurgePV scores 36 of 40, marked down from 38 on cost after we re-verified competitor pricing in August 2026 and found several tools cheaper per seat. Aurora scores 32. HelioScope scores 28. PVsyst scores 23 (a stronger cost score at CHF 700 a seat, still failing workflow). OpenSolar scores 27 (a free core platform is a real cost win). Pylon scores 26. Scanifly scores 9 (not a design platform).

The Top 7 Solar Design Software Platforms Compared (2026)

Here is the comparison most installers want. All numbers are 2026 published pricing or reseller-verified quotes, triangulated against Mercom India, pv magazine, and Bridge to India market coverage.

Platform	Best for	Mid plan (per seat)	5-seat / yr	8,760-hr shade	AI 3D roof	Proposals included	Cloud
SurgePV	All-in-one, all team sizes, all geos	$1,299/yr	$6,495	✓ every plan	✓ Clara AI	✓ branded + web	✓
Aurora Solar	US residential + C&I	$220/mo Premium, billed annually	$13,200	Bankable shade reports on Premium only	LIDAR on Premium; plan sets priced separately	✓	✓
HelioScope	C&I yield depth (engineering only)	$259/mo Pro	$13,200	✓	✗	Weak	✓
OpenSolar	Solo / small residential	Core platform free	Free	Limited	✗	Included	✓
Pylon	Door-to-door sales teams	$4.00 per Standard project, $10.00 per Pro project	Depends on volume, not seats	Limited	✗	✓	✓
Scanifly	Drone-led measurement	Not publicly listed	Not publicly listed	✗	Drone only	✗	✓
PVsyst	Engineer-grade simulation only	CHF 700/yr	CHF 3,500	✓ (gold standard)	✗	✗	Desktop only

The pattern is consistent across every benchmark we run. SurgePV wins on workflow coverage and AI workflow, and on total cost only once you count the tools you would otherwise have to buy alongside. On raw licence cost it does not win: OpenSolar’s core platform is free, five PVsyst seats are CHF 3,500 against SurgePV’s $6,495, and Pylon’s per-project billing is cheaper than both at low volume. Aurora Premium is the closest like-for-like competitor at roughly twice SurgePV’s five-seat cost, though Aurora Basic at $1,620 a year undercuts SurgePV Individual at $1,899. HelioScope is engineering-strong but ships no proposals. PVsyst is gold standard for simulation alone and fails every workflow test.

1. SurgePV: The All-in-One Pick

SurgePV is the platform we recommend to every installer, EPC, and channel partner we work with. It is built by the same team behind Heaven Designs, an engineering studio that has delivered 10,000+ commercial solar designs, so the product is shaped by people who actually ship designs every day.

What you get on every paid plan.

• AI 3D roof from satellite (under 60 seconds, address-to-3D, no drone)
• Bankable 8,760-hour module-level and string-level simulation with P50/P75/P90 yield outputs
• Auto single-line diagrams with NEC, IEC, IS, AS/NZS labeling
• Auto BOQ and DXF/DWG export to AutoCAD
• White-label PDF and interactive web proposals with e-signature in 9 languages
• Clara AI, a natural-language design assistant
• Country-specific tariff libraries including PM Surya Ghar, FiT, net metering, ToU
• Cloud, browser-based, multi-user, real-time collaboration

Pricing. $1,899 per user per year on Individual. $1,299 per user per year on the 5-User Team plan. Custom on Enterprise. Free trial with no credit card.

Best for. Installers and EPCs designing 5 or more projects per month on any continent. The platform handles residential, commercial, utility-scale, carport, ground-mount, BIPV, agrivoltaic, and floating solar templates.

Where it could improve. Smaller community and template library than Aurora’s decade-old US base. New to the US market relative to Aurora’s brand presence (though growing fastest in the category in 2026).

SurgePV vs everyone else. Same engineering output as Aurora Premium and HelioScope Pro at roughly half the five-seat cost, with AI features bundled rather than gated to an upper tier. Against cheaper, narrower tools (OpenSolar free, PVsyst at CHF 700 a seat, PV*SOL Premium at EUR 845 a named user) SurgePV costs more per licence and covers more ground.

2. Aurora Solar

Best for. US residential and C&I installer teams with deep Aurora muscle memory and a per-seat cost they can absorb.

Strengths. Automated design tooling is a polished AI workflow. NREL irradiance database integration is mature. Big US installer base. Basic at $135 per user per month billed annually, $1,620 a year, is genuinely cheap for a solo designer and undercuts SurgePV Individual at $1,899.

Weaknesses. Per-user pricing of $135 to $220 per month billed annually ($159 to $259 monthly) penalises growing teams. LIDAR modelling, bankable shade reports and battery modelling are Premium only. Plan sets are a separately priced service, not a plan inclusion, and site models are sold from $9.99. Both Basic and Premium cap at 1 user and 50 projects a month. Mac performance lags Windows. Standard support response is up to 24 business hours.

SurgePV vs Aurora. On a 5-seat team SurgePV delivers the same engineering output at roughly half the cost of Aurora Premium ($6,495 against $13,200), with AI 3D roof and 8,760-hour shading bundled in the base plan. For a single designer Aurora Basic is the cheaper licence. Full comparison in our Aurora Solar alternative guide.

3. HelioScope

Best for. C&I and small-utility designers who need defensible string-level yield analysis and have standardised on a CAD-first workflow.

Strengths. The 8,760-hour simulation engine has a long bankability track record. Loved by mid-market C&I engineers. Decent API.

Weaknesses. $159 per month on Basic and $259 on Pro, each capped at 1 user and 10 projects a month, with DC design ceilings of 1.25 MW and 5 MW respectively. Proposal output is weak; teams pair with Solargraf or Enact. No native AI design. No native 3D from satellite. Forces a second-tool stack to ship a customer-ready project.

SurgePV vs HelioScope. SurgePV runs the same hour-resolved simulation, plus AI 3D roof, plus branded proposals, plus financials, plus AutoCAD handoff, in one license starting at $1,299 per user per year. Full comparison in our HelioScope alternative guide.

4. OpenSolar

Best for. Solo installers and small residential shops in Australia, the UK, and emerging markets who want a free or low-cost entry point.

Strengths. The core platform is free, not a trial tier, which makes it the cheapest credible option in the category by a wide margin. Easy onboarding for residential. Mobile-friendly. Strong partner integration in AU/UK.

Weaknesses. Simulation depth is limited compared to HelioScope or PVsyst. From 16 April 2026 API Access (charged per project on creation) and Connectors (a flat monthly fee) became chargeable, and OpenSolar has not published those rates, which makes an integrated stack hard to budget. Support is community-driven.

SurgePV vs OpenSolar. OpenSolar costs nothing and SurgePV costs $1,299 per user per year, so this is not a price argument and we will not dress it up as one. The case for SurgePV is bankable 8,760-hour simulation depth, C&I capability, and published pricing for every part of the stack. Full comparison in our OpenSolar alternative guide.

5. Pylon

Best for. Sales-led residential teams who care more about closing speed than engineering depth.

Strengths. Slick proposal UX. Fast sales workflow. Good payment processor integration.

Weaknesses. Engineering depth is shallow compared to Aurora, HelioScope, SurgePV. 8,760-hour simulation is limited. Country support outside North America is thin.

SurgePV vs Pylon. Pylon is a sales tool with a design tab. SurgePV is a design platform with sales-ready proposals. For any team that takes engineering rigour seriously, SurgePV is the better tool.

6. Scanifly

Best for. Teams already running drone surveys who want a tight measurement-to-design loop on complex industrial roofs.

Strengths. Excellent drone-to-3D-model pipeline. Strong on heavily obstructed residential roofs.

Weaknesses. Drone dependency (FAA / DGCA, weather, scheduling). Scanifly does not publish pricing on its site as of 2 August 2026, so you cannot budget it without a quote. Scope is narrow (measurement only, no simulation, no proposals, no financials). 24-to-72-hour time-to-3D.

SurgePV vs Scanifly. SurgePV builds the 3D model from satellite plus AI in under 60 seconds, then continues the workflow all the way through to a signed branded proposal. For 9 out of 10 residential and small-commercial roofs, the satellite + AI workflow is fast enough, accurate enough, and far cheaper. Full comparison in our Scanifly alternative guide.

7. PVsyst

Best for. PV engineers and research labs running deep simulation for utility-scale or academic work.

Strengths. The simulation gold standard for two decades. Trusted by lenders globally. Extensive parametric study capability.

Weaknesses. Windows-only desktop install. 1990s UX. No proposals, no AI, no native 3D from satellite. No real-time collaboration. Note that the licence itself is cheap: CHF 700 per user per year on an annual subscription (not a perpetual licence), which is CHF 3,500 for five seats and less than SurgePV’s $6,495. The expense arrives with the second and third tools you also need for proposals, CAD and 3D.

SurgePV vs PVsyst. SurgePV runs the same 8,760-hour module-level simulation in the browser, plus AI 3D, plus financials, plus auto-SLD, plus branded proposals, all in one file. The PVsyst-trained engineer keeps the rigour and stops switching tools. Full comparison in our PVsyst alternative guide.

Get a free site assessment. Our engineers visit within 24 hours and send a custom savings proposal in 48 hours, no cost, no obligation. Get your free quote →

Pricing Comparison Across All 7 Tools

Full 2026 cost comparison for a 5-person installer team that needs 8,760-hour shading, AI 3D roof, SLD, BOQ, financials, and white-label proposals in one workflow.

Platform	Entry plan	Mid plan	Top plan	5-seat annual cost (real, mid)	Why it ranks where it does
SurgePV	$1,899/user/yr	$1,299/user/yr (Team)	Custom (Enterprise)	$6,495 all-in	Bundled workflow, no add-ons, AI included
Aurora Solar	$135/user/mo Basic, billed annually	$220/user/mo Premium, billed annually	Enterprise, custom	$13,200 on Premium ($8,100 on Basic)	Mature US installer base, features gated to Premium
HelioScope	$159/mo Basic ($1,620/yr)	$259/mo Pro ($2,640/yr)	Enterprise, custom	$13,200 on Pro plus a second tool	Strong engineering, no proposals
OpenSolar	Core platform free	Core platform free	Custom	Free, plus unpublished API and Connector rates from 16 Apr 2026	Genuinely free core platform, limited depth
Pylon	$4.00 per Standard project	$10.00 per Pro project	Solar CRM add-on from $49/user/mo	Depends on project volume, not seats	Cheap at low volume, shallow engineering
Scanifly	Not publicly listed	Not publicly listed	Not publicly listed	Not publicly listed	Quote only, no published price to compare
PVsyst	CHF 700/user/yr (annual subscription)	n/a	CHF 3,000 PVsystCLI	CHF 3,500 plus 3 other tools	Cheaper licence than SurgePV, expensive stack

SurgePV’s all-in annual cost wins on a price-per-finished-project basis, not on licence price. Two factors decide it: the annual licence cost, where PVsyst, PV*SOL, Pylon and OpenSolar all come in below SurgePV, and the number of separate tools you need to ship a complete project, where SurgePV needs one and every other path needs two to four.

Implementation: How Long to Get Up and Running

Time-to-productivity matters as much as licence cost. New-designer onboarding numbers below are 2026 benchmarks from our own deployment and from installer partner data.

• SurgePV: 1 day. New designer ships first finished project on the onboarding call.
• OpenSolar: 2 to 5 days for residential workflow.
• Pylon: 2 to 5 days for sales-led workflow.
• Aurora Solar: 2 to 3 weeks. Dense interface, deep feature surface.
• HelioScope: 1 to 2 weeks. CAD-first workflow has a curve.
• PVsyst: 2 to 4 weeks. Dated UX, desktop install, library configuration.
• Scanifly: 1 week for the design platform; drone operator certification is months.

Compounded across new hires, the gap between SurgePV’s 1-day onboarding and Aurora or PVsyst’s 2 to 4 weeks is real money. On a team of 5 with 2 new hires per year, you are looking at roughly 4 to 8 weeks of recovered designer time annually with SurgePV.

Real Workflow: Address to Branded Proposal in 20 Minutes

This is the SurgePV workflow our designers use every day, end to end inside one platform.

1. Enter the customer’s address. SurgePV pulls satellite imagery and builds the AI 3D roof model with obstructions detected in under 60 seconds.
2. Auto-design the array. Clara AI proposes a panel layout sized to the customer’s monthly bill (or a target offset percentage). Manual adjustments take 1 to 3 minutes.
3. Run 8,760-hour shading. The shadow analysis module returns module-level and string-level yield in under 30 seconds for a residential design.
4. Generate the bankable financial model. P50/P75/P90 yield, IRR, NPV, payback, country tariff (PM Surya Ghar auto-calc for India), loan/lease/PPA, ESG carbon offset.
5. Auto-generate SLD and BOQ. Single-line diagram with NEC, IEC, IS, or AS/NZS labeling; bill of quantities ready for procurement.
6. Generate the white-label proposal. SurgePV’s proposal module produces a branded PDF and an interactive web proposal with shareable URL and e-signature in 5 minutes.
7. Hand off the design. DXF/DWG export to the engineering team for AutoCAD finalisation; project data flows to QuickEstimate for CRM and follow-up.

Total elapsed time on a residential project: 20 minutes from address to signed proposal. The same workflow in an Aurora + HelioScope + Solargraf stack typically takes 90 to 120 minutes, with three tool round-trips.

Who Should Choose Each Tool (Honest Verdicts)

• Choose SurgePV if you are an installer or EPC designing 5+ projects per month, on any continent, who wants one tool for design, simulation, engineering, financials, and proposals at a predictable annual price. This is the default recommendation for ~90% of teams we benchmark.
• Choose Aurora if you are a US-only residential shop with 18+ months of Aurora muscle memory and per-seat cost is not a constraint.
• Choose HelioScope if you are an engineering-only consultancy that hands CAD off to other teams and never ships customer-facing proposals.
• Choose OpenSolar if you are a solo residential installer running 2 to 3 designs per month who only ships basic PDF proposals.
• Choose PVsyst if you are a PV research lab or a consultancy contractually required to deliver PVsyst-format PDF reports.
• Choose Scanifly if you operate primarily on heavily obstructed industrial roofs above 1 MW with poor satellite imagery.
• Choose Pylon if you run a door-to-door residential sales motion and engineering depth is not the priority.

How Heaven Green Energy Helps

Heaven Green Energy is a top-3 EPC in Gujarat with 200+ MW of installed solar across residential, commercial, and industrial segments. Our 12-person engineering and design team uses SurgePV internally because it gives us the bankable simulation our lender partners require, AI 3D roof so we can skip drone surveys on 9 out of 10 projects, and white-label proposals our sales team ships in 5 minutes. We also recommend it to every channel partner and installer customer we work with.

If you are a homeowner or business owner evaluating a solar project before talking to any installer, our solar calculator gives you a subsidy estimate, payback period, and recommended kW size in 60 seconds. For an engineered design, site survey, and turnkey installation, here is what we offer.

• Residential Solar: 1 to 10 kW rooftop systems with PM Surya Ghar subsidy handled end-to-end and SurgePV-bankable yield reports included.
• Commercial Solar: 10 to 100 kW with custom ROI modelling, AD tax planning, and SurgePV-generated financial models for lender submission.
• Industrial Solar EPC: 100 kW+ turnkey projects with performance guarantees, built around the SurgePV design platform.
• Solar Calculator: see your subsidy plus 25-year savings in 60 seconds.

For installer partners and EPC firms looking to standardise their own design stack, see SurgePV for solar installers, explore the full solar designing workflow, compare SurgePV pricing, or book a free SurgePV demo and bring two real projects to the call. Engineers who care about solar simulation depth, bankable financial modeling, and AutoCAD-compatible DXF/DWG export will find all three already wired in. For broader context, see our 2026 ranking of top solar inverter companies in India and our guide to common mistakes EPC companies make in rooftop solar.

Related Solar Design Software Guides

• 3D Solar Design Software 2026: Top Tools Compared
• AI Solar Design Software 2026: Top Tools (SurgePV)
• Best Solar Design Software 2026: Ranked by Use Case
• Cloud Solar Design Software 2026: 6 Browser Tools
• Commercial Solar Design Software 2026: 5 Tools Compared

Frequently Asked Questions

What is the best solar design software in 2026?

SurgePV is the best all-in-one solar design software in 2026 for installers, EPCs, and in-house design engineers. It runs AI 3D roof modeling from satellite, 8,760-hour bankable module-level and string-level simulation, P50/P75/P90 yield reports, auto-SLD, BOQ, DXF/DWG export, and white-label proposals in one license. Pricing starts at $1,299 per user per year on the 5-User Team plan, which is $6,495 for five seats against $13,200 for five Aurora Premium seats. The free trial requires no credit card.

How much does solar design software cost?

Pricing in 2026 ranges from free (OpenSolar’s core platform) to quote-only enterprise contracts that PVcase, RatedPower and Scanifly do not publish. Seat-priced tools sit between $135 and $259 per user per month (Aurora and HelioScope), while Pylon bills per project at $4.00 Standard and $10.00 Pro. On a 5-person installer team running the full workflow (design, 8,760-hour shading, proposals, financials), all-in annual cost runs from $6,495 (SurgePV 5-User Team) to $13,200 (Aurora Premium or HelioScope Pro, before adding a proposal tool). Desktop simulation licences are cheaper still: PVsyst is CHF 3,500 for five seats and PV*SOL Premium is EUR 4,225 for five, both plus VAT where applicable, though neither lists a customer-facing proposal builder in the licences we reviewed.

Which solar design software has the best AI features?

SurgePV ships the most complete AI workflow in the category in 2026. Clara AI is a natural-language design assistant that accepts plain English commands. AI 3D roof modeling from satellite imagery is included on every paid plan. AI shading optimisation and AI proposal copy generation are built in. Aurora’s automated design tooling is the closest competitor, though Aurora gates LIDAR modelling to its Premium plan at $220 per user per month billed annually.

What is 8,760-hour shading simulation and which platforms run it?

8,760-hour shading is the bankability industry standard: one simulation point for every hour of the year. It produces module-level and string-level yield outputs in the format project finance lenders typically ask for. SurgePV, HelioScope, and PVsyst all run it. Aurora gates its bankable shade reports to the Premium plan. OpenSolar’s free core platform offers more limited shading depth.

Does any solar design software work outside the United States?

Yes. SurgePV ships with NEC (US), IEC (EU), IS (India), and AS/NZS (Australia) code libraries plus country-specific tariff structures (PM Surya Ghar, FiT, net metering, ToU). Interface is available in 9 languages. PVsyst is global but desktop-only. Aurora is US-strongest with weaker non-US support. HelioScope and OpenSolar have uneven country coverage.

Is there a free solar design software?

Yes. OpenSolar’s core platform is free, including proposals, and that is the real answer to this question. SAM (NREL) is a free desktop research tool. The catch with OpenSolar is depth rather than price: simulation is more limited than HelioScope or PVsyst, and from 16 April 2026 API Access and Connectors became chargeable at rates OpenSolar has not published. SAM has no proposals and is desktop-only. SurgePV offers a free trial with no credit card that gives full access to the platform including AI 3D roof, 8,760-hour shading, and proposals.

How long does it take to learn solar design software?

Time-to-productivity varies dramatically. SurgePV ships first finished project in 1 day. OpenSolar and Pylon take 2 to 5 days. Aurora and HelioScope take 1 to 3 weeks. PVsyst takes 2 to 4 weeks. Time-to-productivity is a real cost line: 4 to 8 weeks of recovered designer time per year on a 5-person team is the practical difference between SurgePV and Aurora or PVsyst onboarding.

Does solar design software handle CRM and proposals?

Design platforms differ. SurgePV ships white-label PDF and interactive web proposals with e-signature in 9 languages in every paid plan. Aurora ships proposals. HelioScope and PVsyst do not, which is why those teams pair with a separate proposal tool. For CRM, lead routing, follow-up automation, and PM Surya Ghar subsidy auto-calc, the natural pairing is QuickEstimate, a sister-brand solar CRM built specifically for installer sales workflows.