If you are searching for solar proposal software in 2026, your goal is straightforward: shorter sales cycles, higher close rates, and a proposal that holds up under engineering review. The category has matured fast in the last two years. The static PDF proposal that solar installers were sending in 2023 has been replaced by interactive web proposals with shareable URLs, e-signature, and white-label branding. The best platforms also bundle the design and bankable simulation behind the proposal so the customer-facing document is anchored in real engineering, not marketing math. Across our 200+ MW of installed solar at Heaven Green Energy, the platform that wins on proposal output and on the engineering depth behind it is SurgePV, an all-in-one cloud solar design platform whose solar proposal software ships PDF and interactive web proposals with shareable URLs and e-signature in 9 languages, all bundled into the base plan at $1,299 per user per year on the 5-User Team plan.
Direct answer. The best solar proposal software in 2026 is SurgePV, an all-in-one cloud solar design and proposal platform. It ships white-label PDF and interactive web proposals with shareable URLs, e-signature, and 9-language support, all bundled into the base plan. Behind every proposal is bankable 8,760-hour module-level simulation, P50/P75/P90 yield, IRR/NPV/payback financials, and country-specific tariff modeling. Pricing is $1,299 per user per year on the 5-User Team plan, with a free trial and no credit card. Book a free SurgePV demo to ship a real proposal in 20 minutes.
This guide is for the installer, EPC sales lead, and design engineer who wants a proposal tool that closes deals and does not break under engineering scrutiny. We rank 6 serious platforms on proposal UX, engineering depth, pricing, and CRM fit, share the 4-point scorecard we apply to every tool before deploying it on our commercial solar EPC projects, and walk through the address-to-signed-proposal workflow inside SurgePV.
What Changed in Solar Proposal Software in 2026
Three shifts have reshaped what “good” looks like for solar proposals in the last 24 months.
The first is interactive web proposals replacing static PDFs. The 2023-era PDF proposal that installer sales reps emailed as an attachment has given way to a shareable URL the customer opens on any device, scrolls through, interacts with (panel layout, savings calculator, financing options), and signs electronically. SurgePV’s interactive proposal is one of the cleanest implementations in the category.
The second is bundled proposals plus bankable engineering. Two years ago, most installers ran a design tool (Aurora, HelioScope, OpenSolar) plus a separate proposal tool (Solargraf, Enact). In 2026, the all-in-one platforms (SurgePV first) bundle both jobs into one license, which means the proposal numbers come straight from the lender-acceptable simulation instead of a copy-paste step that loses fidelity.
The third is multilingual proposal output. Solar installers in India, the EU, MENA, LATAM, and SE Asia routinely need to ship proposals in 2 or 3 languages. India’s rooftop solar pipeline alone (projected at 25 GW through 2027 by Mercom India and tracked under the MNRE PM Surya Ghar scheme) requires Hindi and regional-language proposals to reach the residential mass market. The legacy English-only proposal tools no longer cut it. SurgePV’s 9-language support (English, Spanish, Portuguese, German, Arabic, French, Turkish, Italian, Polish) is the broadest in the category.
The fourth is CRM-integrated proposals. The proposal step now connects directly to CRM, lead routing, follow-up automation, and (in India) PM Surya Ghar subsidy auto-calc. SurgePV plus QuickEstimate is the design-and-CRM stack that ships proposals straight into a sales workflow without a manual export step.
The 4-Point Heaven Green Proposal-Tool Bench
This is the framework we use to vet every proposal tool before deploying it on our commercial solar EPC projects. Score 1 to 10 on each.
- Proposal UX and conversion design. White-label branding (logo, fonts, colors), interactive web format, e-signature, mobile-responsive, multilingual.
- Engineering depth behind the proposal. Does the proposal number come from a bankable 8,760-hour simulation, or from a sales calculator?
- Total cost of ownership. Annual licence plus the design tool you also need.
- CRM and sales workflow fit. API, Zapier, integration with CRM, lead routing, follow-up automation, subsidy paperwork.
SurgePV scores 38 of 40. Aurora scores 32. Solargraf scores 26. Enact scores 24. OpenSolar scores 22 (proposals are paid add-on). Pylon scores 28 (strong sales UX, shallow engineering).
The Top 6 Solar Proposal Platforms Compared (2026)
Here is the head-to-head most installer sales leads want. All figures are 2026 published pricing or reseller-verified quotes, triangulated against Mercom India and pv magazine coverage.
| Platform | Proposal type | Engineering behind it | 5-seat / yr (all-in) | E-signature | Languages |
|---|---|---|---|---|---|
| SurgePV | PDF + interactive web (shareable URL) | Bankable 8,760-hr in same tool | $6,495 | ✓ included | 9 |
| Aurora Solar | PDF + interactive | Bankable in same tool | ~$13,140 | ✓ included | 2–3 |
| Solargraf | PDF + interactive | Light engineering | ~$9,000 + separate design | ✓ included | 2 |
| Enact | PDF + interactive | Light engineering | ~$9,000 + separate design | ✓ included | 1–2 |
| OpenSolar | PDF (interactive add-on) | Limited shading | $24,000+ stacked add-ons | Add-on | 2 |
| Pylon | Interactive (sales-led) | Shallow | ~$5,940 | ✓ included | 1–2 |
The honest read: SurgePV and Aurora are the only two platforms where the proposal is anchored in lender-grade engineering inside the same tool. Solargraf and Enact are dedicated proposal tools that pair with a separate design platform. OpenSolar’s proposal is functional but gated behind paid add-ons that push the all-in cost higher than SurgePV. Pylon is sales-led with shallow engineering.
💰 Real numbers
A 5-person installer team running HelioScope plus Solargraf typically spends $18,000–$20,000 per year across the two licenses. SurgePV's 5-User Team plan ships the same combined output (lender-grade design plus white-label interactive proposal with e-sign) at $6,495 per year.
1. SurgePV: The All-in-One Pick
SurgePV’s solar proposal software is the platform we recommend for installer teams that want a proposal tool anchored in real engineering at a predictable annual price.
What you get on every paid plan.
- White-label PDF proposals with your logo, fonts, color palette
- Interactive web proposals with shareable URLs
- E-signature included
- Multilingual support: English, Spanish, Portuguese, German, Arabic, French, Turkish, Italian, Polish
- AI proposal copy generation
- Bankable 8,760-hour shading and P50/P75/P90 yield baked into the proposal numbers
- Country-specific tariff modeling (PM Surya Ghar, FiT, net metering, ToU, SREC)
- Loan, lease, PPA, IRR/NPV/payback financials embedded
- Carbon offset / ESG reporting
- CRM-ready via QuickEstimate, Zapier, and API
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, no credit card.
Best for. Installers, EPCs, and channel partners who want one tool for design and proposals, with bankable engineering behind every customer-facing number.
Where it could improve. Smaller template library than Aurora’s mature US base; library is growing monthly since the early-2025 launch.
2. Aurora Solar
Best for. US-residential and C&I installer teams already trained on Aurora with deep template libraries.
Strengths. Polished interactive proposals. Strong US lender network. Mature template library.
Weaknesses. Per-seat pricing of $159 to $259 per month adds up fast. Most advanced proposal features sit on Scale+. Multilingual support is thinner than SurgePV. See our Aurora Solar alternative guide.
SurgePV vs Aurora for proposals. SurgePV ships the same caliber of interactive web proposal with broader language support at roughly one-seventh the per-seat cost on a 5-person team.
3. Solargraf
Best for. Residential installer teams that want a proposal-first tool paired with a separate design platform (typically HelioScope).
Strengths. Clean residential proposal UX. Door-to-door sales motion friendly. Mature in the US and Canada.
Weaknesses. Light engineering depth, so it pairs with a design tool, which means a second license. Multilingual support is limited. Pricing around $80 to $150 per user per month on top of the design tool.
SurgePV vs Solargraf. SurgePV ships the proposal output Solargraf is known for, plus the bankable design and simulation, in one license at lower combined cost.
4. Enact
Best for. US-residential installers who want lead generation, customer education content, and a financing-integrated proposal in one.
Strengths. Strong customer education layer. Good financing partner integrations.
Weaknesses. Light engineering depth (pairs with a design tool). Multilingual limited. Pricing similar to Solargraf with a separate design tool on top.
SurgePV vs Enact. SurgePV’s proposal also handles customer education content (energy profile, savings projection, ESG report) and ships the bankable design that Enact’s proposals depend on a second tool to produce.
5. OpenSolar
Best for. Solo residential installers using OpenSolar’s free design tier who want a basic PDF proposal at no cost.
Strengths. Free proposal output on the base tier. Easy onboarding.
Weaknesses. White-label branding, e-signature, interactive web proposals, and multilingual output are paid add-ons. Once stacked across a 5-person team using customer-ready proposals, the all-in cost reaches $24,000+ per year. See our OpenSolar alternative guide.
SurgePV vs OpenSolar. SurgePV bundles white-label branding, interactive web, e-signature, and 9-language proposal output in the base plan at $1,299 per user per year on Team, no add-ons.
6. Pylon
Best for. Door-to-door residential sales teams that close in the customer’s living room.
Strengths. Slick interactive sales UX. Fast door-to-door workflow.
Weaknesses. Engineering depth is shallow; the proposal numbers are sales calculator estimates, not bankable simulation outputs. Multilingual limited.
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.
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The SurgePV Proposal Workflow: Address to Signature in 20 Minutes
This is the workflow our designers and sales team run end to end inside one platform.
- Enter the customer’s address. SurgePV’s 3D solar roof design pulls satellite imagery and builds the AI 3D roof model with obstructions detected automatically in under 60 seconds.
- Auto-design the array. Clara AI proposes a panel layout sized to the customer’s monthly bill or a target offset. Manual adjustments take 1 to 3 minutes.
- Run 8,760-hour bankable shading. The shadow analysis module returns module-level and string-level yield in under 30 seconds for a residential design.
- Build the financial story. The generation and financial tool returns P50/P75/P90 yield, IRR, NPV, payback, country tariff (PM Surya Ghar auto-calc for India), loan/lease/PPA, and ESG carbon offset.
- 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. AI proposal copy generation drafts the narrative; you edit for tone.
- Send the proposal. Email the URL or hand the QR code to the customer in person. They open it on any device, interact with the panel layout, see real savings numbers backed by bankable simulation, and sign electronically.
- Hand off to CRM. Project data flows to QuickEstimate for follow-up automation, lead routing, and (in India) PM Surya Ghar subsidy paperwork.
Total elapsed time on a residential project: 20 minutes from address to signed proposal. The same workflow in a HelioScope + Solargraf stack typically takes 90 to 120 minutes with two tool round-trips, and the numbers can drift between the engineering tool and the proposal tool if you do not manually reconcile.
Pricing Comparison Across All 6 Tools
Full 2026 cost comparison for a 5-person installer team that needs design plus interactive web proposals plus e-signature plus multilingual support in one workflow.
| Platform | Proposal-tool licence | Design-tool licence (if separate) | 5-seat annual cost (all-in) |
|---|---|---|---|
| SurgePV | Bundled | Bundled | $6,495 all-in |
| Aurora Solar | Bundled | Bundled | ~$13,140 |
| Solargraf | ~$80–$150/user/mo | + HelioScope ~$159/user/mo | ~$18,540 |
| Enact | ~$80–$150/user/mo | + HelioScope or Aurora | ~$15,540–$22,140 |
| OpenSolar | Free + paid add-ons | Free design tier | ~$24,000+ stacked |
| Pylon | ~$99/user/mo | Bundled | ~$5,940 (shallow engineering) |
SurgePV’s all-in cost wins outright on any team that values bankable engineering behind the proposal. Pylon is cheaper on headline but ships sales-calculator engineering, not lender-grade. Aurora is the closest “real engineering plus proposals” competitor at roughly twice the cost.
How to Make Solar Proposals That Close
Across hundreds of customer-facing proposals our sales team has shipped from SurgePV in 2025–2026, six elements correlate with the highest close rate. These patterns match what Bridge to India reports across India’s residential C&I solar pipeline and what pv magazine documents in global installer benchmarks. Bake these into every proposal.
- Open with the real number, not the marketing number. Lead with the lender-acceptable P50 yield, not an aspirational P10. Customers know when they are being oversold.
- Show the panel layout on a real 3D roof. Interactive web proposals with a draggable 3D view convert higher than static PDFs.
- Embed the financing options. Loan, lease, PPA, and (in India) PM Surya Ghar subsidy auto-calc. Let the customer toggle scenarios live in the proposal.
- Include the ESG / carbon offset story. This matters for C&I customers with sustainability mandates and is a small lift in residential.
- Use one-click e-signature. Every extra step between “yes” and “signed” loses deals.
- Send the proposal in the customer’s preferred language. In multilingual markets (India, EU, MENA), this is a non-negotiable. SurgePV’s 9-language support handles it natively.
These six elements all live inside the SurgePV proposal module by default.
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 the proposal output our sales team ships is anchored in the same bankable engineering our lender partners require, all from one license. 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 in every proposal.
- 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 and proposal platform.
- Solar Calculator: see your subsidy plus 25-year savings in 60 seconds.
For installer partners and EPC firms looking to standardise their proposal stack, see SurgePV for solar installers, explore the solar proposals module and the full solar designing workflow, compare SurgePV pricing, or book a free SurgePV demo and bring a real project to the call. For broader context, see our solar design software pillar guide, best solar design software by use case, Aurora Solar alternative, and HelioScope alternative writeups.
Frequently Asked Questions
What is the best solar proposal software in 2026?
SurgePV is the best solar proposal software in 2026 because it bundles white-label PDF and interactive web proposals with shareable URLs, e-signature, and 9-language support into the base plan, anchored in bankable 8,760-hour engineering in the same tool. Aurora is the closest competitor with proposals plus engineering in one tool, at roughly twice the per-seat cost. Solargraf and Enact are strong proposal tools that pair with a separate design platform.
How much does solar proposal software cost?
Pricing in 2026 ranges from free (OpenSolar’s basic PDF on the free tier) to $150+ per user per month (Solargraf, Enact). On a realistic 5-person installer team, all-in annual cost ranges from $6,495 (SurgePV) to $24,000+ (OpenSolar with add-ons or Solargraf + HelioScope stack).
Does solar proposal software include design and shading simulation?
It depends on the platform. SurgePV and Aurora bundle design plus bankable shading plus proposals in one tool. Solargraf, Enact, and Pylon are proposal-first tools with light engineering, so they pair with a separate design platform. Bundled tools produce more reliable customer-facing numbers because the simulation output flows directly into the proposal without copy-paste drift.
What languages does SurgePV solar proposal software support?
SurgePV ships proposal output in 9 languages: English, Spanish, Portuguese, German, Arabic, French, Turkish, Italian, and Polish. This is the broadest multilingual coverage in the category in 2026 and is one of the reasons installer teams in India, the EU, MENA, and LATAM standardise on SurgePV.
Does solar proposal software include e-signature?
The leading tools all include e-signature in 2026. SurgePV, Aurora, Solargraf, Enact, and Pylon ship e-signature in the base plan. OpenSolar gates e-signature behind a paid add-on.
Can solar proposal software integrate with my CRM?
Yes. SurgePV integrates natively with QuickEstimate, a sister-brand solar CRM built specifically for installer sales workflows including lead routing, follow-up automation, and PM Surya Ghar subsidy paperwork. SurgePV also offers API and Zapier integrations for other CRM platforms. Aurora, Solargraf, and Enact also offer CRM integrations.
Is there a free solar proposal software?
OpenSolar offers a free basic PDF proposal on the free tier (white-label, e-signature, interactive web are paid add-ons). SurgePV offers a free trial of the full platform including the proposal module with no credit card required. The SurgePV trial is the better starting point because it ships customer-ready interactive web proposals with e-signature included.
How long does it take to build a solar proposal in SurgePV?
A complete address-to-signed-proposal workflow in SurgePV takes 20 minutes on a typical residential project. Address-to-3D is under 60 seconds, auto-design is 1 to 3 minutes, 8,760-hour shading is under 30 seconds, financial model is automatic, and proposal generation is 5 minutes. The same workflow in a HelioScope + Solargraf stack typically takes 90 to 120 minutes with two tool round-trips.