Best Solar Proposal Software USA: 2026 Guide

US residential solar sales changed shape in April 2023, and most proposal software has not caught up. When California moved to NEM 3.0, export credits dropped to roughly $0.05 to $0.08 per kWh against retail rates approaching $0.40. The proposal metric that had driven American solar sales for fifteen years, annual offset percentage, stopped describing the economics. Yet walk through the demo of almost any solar proposal tool in 2026 and the headline number is still offset. This guide compares the seven proposal platforms US installers actually shortlist, judges them on the three things that decide a US deal in 2026 (self-consumption modelling, federal ITC accuracy, and state incentive coverage), and explains why the design tool and the proposal tool should be the same product.

• The 30% residential credit under Section 25D ended for expenditures made after 31 December 2025, per the IRS Residential Clean Energy Credit page. Commercial credits under Section 48E continue only for solar projects that began construction by 4 July 2026 or are placed in service by 31 December 2027, per IRS Notice 2025-42.
• SurgePV generates the proposal from the same project record as the bankable design, at $1,299 to $1,899 per user per year.
• A five-seat SurgePV team pays $6,495 per year. The equivalent Aurora design plus Sales Mode stack runs $14,000 to $18,000.
• Book a free SurgePV demo and build a proposal on one of your live deals.

Short version. The best solar proposal software for US installers in 2026 is SurgePV, because the proposal is generated from the same engineering project as the design, and the financial engine models the federal commercial ITC, MACRS depreciation, state SRECs, and NEM 3.0 hourly self-consumption. Aurora Sales Mode is the strongest residential-only alternative at roughly triple the seat cost. Solargraf and Pylon are credible dedicated proposal tools if you already own a design platform.

The US has the deepest solar software market in the world, which cuts both ways. There are more mature options here than anywhere else, and there is more legacy assumption baked into them. Several of the tools below were built when net metering paid retail rate in most of the country, and their default proposal templates still reflect that world. For the design side of the same decision, our solar design software USA guide covers the engineering comparison, and the global solar proposal software ranking covers the category without the US lens.

What US Solar Proposals Have To Get Right In 2026

A US proposal carries more regulatory and financial weight than a proposal in almost any other market. Four things have to be correct or the document is worse than useless.

Federal ITC treatment. The residential credit and the commercial credit now follow different timelines. The 30% Residential Clean Energy Credit under Section 25D ended for expenditures made after 31 December 2025 under Public Law 119-21, according to the IRS Residential Clean Energy Credit page, so a 2026 residential proposal should not apply it. Commercial claims run under Section 48E (with 45Y for production credits), where the credit can reach 50% by stacking a 10% domestic content bonus and a 10% energy community bonus. For solar, those credits continue only if construction began by 4 July 2026 or the facility is placed in service by 31 December 2027 (IRS Notice 2025-42). Systems above 1 MW AC must satisfy prevailing wage and apprenticeship requirements to earn the full rate rather than the 6% base. SurgePV’s financial modelling engine applies these as separate toggles, and the full mechanics are covered in SurgePV’s IRA solar tax credit guide.

Depreciation on commercial deals. MACRS five-year depreciation, with bonus depreciation where it still applies, changes after-tax IRR substantially on C&I projects. A proposal that shows a commercial buyer only the ITC is understating the return, which sounds harmless until a competitor shows the full picture and wins the deal on arithmetic you left out.

State incentive layers. SREC markets operate in New Jersey (SREC-II), Massachusetts (SMART), Illinois (Illinois Shines), Maryland, Pennsylvania, Ohio, and DC. Program caps, block pricing, and adders move several times a year. A maintained library beats a hand-built template the moment you sell across a state line.

Export compensation reality. This is where most tools fall short, and it deserves its own section.

The NEM 3.0 Problem Most Proposal Software Still Ignores

Under California’s NEM 3.0, exported energy earns roughly $0.05 to $0.08 per kWh while imported energy costs close to $0.40 per kWh at peak. That is a spread of five to eight times. New York’s VDER runs on a formula rather than retail rate. Arizona credits excess energy near $0.09 per kWh. New Jersey still pays close to full retail under NEM Plus, and so the old model survives in pockets.

The metric that matters now is self-consumption, which means the share of generated energy the household uses at the moment it is produced. Raising it requires an hourly model, and raising it deliberately requires battery dispatch logic. A proposal tool that runs on annual kWh totals cannot compute it at all.

This creates a specific test you can run on any vendor demo. Ask them to show you the hourly load and generation overlay for a California address with a battery, then ask for the self-consumption percentage. Tools built on an 8,760-hour engine answer in seconds. Tools built on annual offset change the subject. The engineering side of that capability is covered in our solar plus storage design software comparison, and SurgePV’s California NEM 3.0 guide sets out the rate mechanics.

The commercial consequence is real. Customers who signed on an offset headline and then saw a bill that did not match are the source of a meaningful share of US solar complaints. A proposal that models self-consumption honestly closes at a slightly lower rate and cancels far less.

The Seven US Solar Proposal Platforms Worth Evaluating

1. SurgePV, the integrated pick

The proposal is generated from the same project record as the design, so the engineering numbers and the customer numbers cannot drift. Ships 8,760-hour module-level shading, bankable P50, P75, P90 output, hourly self-consumption with battery dispatch, the commercial ITC with both bonus adders, MACRS, maintained SREC libraries, and white-label proposals with e-signature. Flat $1,299 to $1,899 per user per year, with no separate sales module to buy.

2. Aurora Sales Mode

The strongest residential proposal experience on its home turf, and the deepest US integration set. Sales Mode is a separate purchase on top of the design seat, so the real cost is the stack rather than the headline. Genuinely good at the interactive customer-facing document. See our Aurora Solar alternative comparison for the plan-by-plan breakdown.

3. Solargraf

Enphase-owned, which makes it a natural fit for crews standardised on Enphase microinverters. Fast residential templates, solid e-signature, priced around $1,200 to $2,400 per user per year. Shading is simplified rather than bankable, so it pairs with a design tool rather than replacing one. More detail in our Solargraf alternative review.

4. Pylon

Built for speed in sales-led residential teams. Dynamic pricing and quick quote turnaround. Per-feature pricing means the quoted number and the used number differ. Limited engineering depth, so C&I work needs another tool. Covered further in our Pylon alternative comparison.

5. Enact Solar

Strong on financing presentation and homeowner-facing clarity, with decent ITC handling. Smaller US installed base than Aurora or Solargraf. See our Enact Solar alternative review.

6. OpenSolar Pro

The proposal layer on top of OpenSolar’s free design tier. Genuinely capable for simple residential, and hard to beat on entry cost. Add-ons stack quickly at C&I scale, and shading is simplified. Our OpenSolar alternative breakdown covers where the free tier stops paying off.

7. Sighten

Historically strong on financing workflows and TPO structures. Its position has narrowed as integrated platforms absorbed the same capability. Worth evaluating if lease and PPA structures dominate your mix.

US Solar Proposal Software Comparison

The pattern is consistent. Two platforms generate the proposal from a real engineering record and model the post-NEM-3.0 economics properly. The rest either sit downstream of a design tool or run on annual offset arithmetic.

Worked Example: 8.4 kW Plus Battery In San Diego

This is an illustrative calculation, not a specific customer project. The inputs are stated so you can check the arithmetic.

Inputs: 8.4 kW DC array, 11.5 kWh battery, south and west roof planes, 1,750 kWh per kW annual specific yield, retail import averaging $0.38 per kWh, NEM 3.0 export credit at $0.06 per kWh, installed cost $31,000 before incentives.

The offset-led proposal overstates year one savings by about $1,364, roughly 32%. That gap does not show up at signing. It shows up on the first summer bill, and it is the reason the customer calls. Note also that the battery is what lifts self-consumption to 71%; without it the same array would land nearer 45% on these load assumptions.

Pricing For A Five-Seat US Team

The full plan comparison sits on the SurgePV pricing page. The number worth focusing on is not the license line. A two-tool stack costs an hour of re-entry per deal, and at 30 deals a month that is a headcount question rather than a software question.

Who Should Choose What

• Choose SurgePV if you want one license covering design and proposals, you sell in more than one state, or you need commercial ITC and MACRS modelling alongside residential work.
• Choose Aurora Sales Mode if you are US residential only, already committed to Aurora for design, and the upper-tier spend is already approved.
• Choose Solargraf if you are an Enphase-standardised residential crew that already owns a design tool and wants a fast, clean customer document.
• Choose Pylon if proposal velocity in a small sales-led residential team is the only priority and engineering lives elsewhere.
• Choose Enact if financing presentation is your differentiator and your volume is residential.
• Choose OpenSolar Pro if you are early, price-sensitive, and your project mix is simple residential.
• Choose Sighten if lease, PPA, and TPO structures are the majority of your book.

Once the proposal is signed, the pipeline and follow-up sit in a CRM rather than the design tool. QuickEstimate is the sister product built for that handoff, and SurgePV passes the signed project across by API.

A proposal tool only earns its place inside a working stack. The wider solar software picture in the USA covers what sits either side of it.

The Bottom Line

US proposal software is a mature category solving a problem that changed underneath it. Offset percentage was the right headline when export paid retail. It is the wrong headline in a NEM 3.0 world, and the tools that still lead with it are helping you write a document your customer will dispute.

• Test any vendor on self-consumption, not offset. Ask for the hourly overlay and the self-consumption percentage on a California address with a battery. The answer separates the field in about a minute.
• Check commercial credit depth before you buy. Section 48E, the domestic content and energy community bonuses, MACRS, and the prevailing wage threshold above 1 MW AC either exist in the financial engine or they do not.