OpenSolar Pricing in 2026: The Free Sticker and Hidden Transaction Fees

A US residential installer running 220 systems per year picks OpenSolar at month one because the sticker says free. By month nine, the finance lead notices that 0.8 to 1.5 percent of every financed system ticket is routing back to OpenSolar through the partner-lender network. On a 65 percent finance attach rate at a $25,000 average system price, the platform that was supposed to be free has invoiced the business between $42,000 and $94,000 in the same year. That is roughly the cost of a full-time designer, paid not in cash but in lost margin on every deal that closed.

Direct answer. OpenSolar pricing in 2026 is published as $0 per user per month on the standard tier. The real all-in cost is a function of transaction fees collected on financed deals routed through the OpenSolar partner-lender network (0.8 to 1.5 percent of system price), hardware referral commissions on linked distributors, and paid add-ons that gate email support and white-label proposal features. A 220-system installer with a 65 percent financing rate pays between $42,000 and $94,000 per year in fees. The same workload on a flat-fee platform like SurgePV at $1,299 per user per year for a five-seat tier costs $6,495 total, with no percentage-of-revenue tax on closed deals.

This guide is for the US residential installer running between 80 and 500 systems per year who is either on OpenSolar today and wants to model the true cost, or is shopping a replacement and needs the real number, not the marketing number. It is written by the Heaven Designs engineering bench, which audits installer tool stacks across 38 US states as part of the permit design intake.

Why the Free Sticker Is Not the Real Price

OpenSolar’s headline price is genuinely $0 per user per month for the standard tier. The platform is not lying when it says that. What it does not lead with on the homepage is that the business model is not freemium SaaS. It is a transaction-fee marketplace. The design tool is the loss leader. Revenue comes from the lender attach and the hardware partner attach on the deals that close inside the platform.

That structure is not unusual in finance-adjacent SaaS. It is unusual in solar design software, where most competitors charge a per-seat flat fee. The asymmetry matters because the cost of the platform scales with success. The more systems an installer closes, the more they pay. Above roughly 80 systems per year, the math flips. OpenSolar becomes the most expensive design tool in the comparison set, not the cheapest.

The pricing page reads $0. The MSA reads otherwise.

The master service agreement governing the partner-lender integration is where the fee schedule lives. Installers who route a financed deal through one of the integrated lenders inside OpenSolar accept a referral fee structure that ranges between 0.8 and 1.5 percent of the financed amount. On a $25,000 residential system at the median fee of 1.15 percent, that is $287.50 per deal. Multiply by 220 deals per year at a 65 percent finance attach, and the platform invoices $41,096. At the top of the range it is closer to $94,000.

Hardware referral fees stack separately

OpenSolar’s distributor partner integrations route hardware bills of materials through preferred suppliers. The exact commission structure is not published, but installer reports on procurement forums describe a hardware referral premium of 1 to 3 percent of materials cost on routed orders. On a $14,000 materials BOM with a 2 percent premium, that is $280 per system. The number is smaller than the financing fee but it is additive. An installer who routes both finance and hardware through OpenSolar pays between $500 and $700 per system in implicit fees.

OpenSolar Pricing Tiers, Broken Down

There are three pricing motions to understand. The published per-seat sticker. The transaction-fee schedule. The paid add-on tiers.

Standard tier (the free one)

The standard tier carries the $0 per user per month sticker. It includes the design canvas, the AI 3D roof modeling that ships out of a satellite image, a basic proposal, and access to the integrated lender and distributor partners. Email support is community-driven (forum-based) rather than direct. The platform retains the right to route the financing or hardware attach on closed deals through its partner network, which is where the implicit fee lives.

Paid tiers (Exclusive and beyond)

The paid tiers add direct email support, the white-label proposal feature with a removable OpenSolar logo, custom CRM integrations, and priority feature requests. Public reporting and installer chatter put the paid tier price between $50 and $200 per user per month depending on team size and feature mix. The paid tiers do not eliminate the transaction fee schedule. The lender attach percentages still apply on routed deals.

Enterprise

Enterprise pricing is custom-negotiated and typically includes a guaranteed lender attach rate, dedicated account management, and an SSO integration. For installers running over 500 systems per year, enterprise becomes a real conversation because the implicit fees on a $20 million in routed financing reach into six figures.

The Free-Tier True Cost Test

Every installer evaluating OpenSolar asks the same question with the wrong framing. “Is it really free?” is the wrong question. The right question is “what is the all-in cost of moving 100 systems from address to permit-ready packet through this platform versus a flat-fee competitor?” The Free-Tier True Cost Test names the four hidden costs that turn the free sticker into a five-figure annual invoice.

Add the four together for a fair comparison. The 220-system installer pays a sticker of $0, an implicit transaction-fee load of $42,000 to $94,000, optional paid add-ons of $1,800 to $7,200, and a permit packet line that runs either as a salaried designer or a per-project Heaven Designs intake. On the same volume, SurgePV pricing at the five-seat tier is $6,495 total for the year with no transaction-fee tax. The crossover point is around 60 to 80 systems per year. Above that, OpenSolar costs more on a fully-loaded basis.

The 220-System Worked Example

Take a concrete installer profile and run the numbers. The installer closes 220 residential systems per year at an average system price of $25,000. Sixty-five percent of deals finance, which is roughly the US market average per SEIA market data. The average hardware BOM is $14,000 per system.

The financed system volume is 143 deals at $25,000 each, totaling $3.575 million in financed origination. The lender fee at the midpoint of 1.15 percent is $41,113 per year. At the low end of 0.8 percent it is $28,600. At the high end of 1.5 percent it is $53,625.

The hardware referral on routed BOMs is layered on top. If the installer routes 50 percent of hardware purchases through OpenSolar distributor partners (a conservative attach rate), the routed materials are 110 systems times $14,000 equals $1.54 million. A 2 percent referral premium is $30,800.

Total implicit fees for the year sit between $59,400 (low end, partial attach) and $84,425 (midpoint, partial attach) and up to $111,000 at the high end with full hardware attach. The marketing page still reads $0 per user per month.

What OpenSolar Does Well

The criticism of the pricing model is real. The platform itself is genuinely capable in several areas. A fair comparison names the strengths before naming the gaps.

For a deeper feature-by-feature view, the published OpenSolar vs SurgePV comparison covers shading accuracy, proposal motion, and permit-output quality side by side.

Where OpenSolar Falls Short on Permit Packets

The 8,760-hour simulation is the threshold question for any installer that takes bankability seriously on commercial projects. OpenSolar’s shading model is competitive on the residential canvas but does not produce a full 8,760-hour simulation with module-level mismatch in a format that a financing engineer accepts on a C&I project. For sub-50 kW residential that constraint rarely matters. For 100 kW commercial and above it always matters.

The single-line diagram is the second pinch point. OpenSolar auto-generates a residential SLD but the output is not consistently NEC 2023-compliant on edge cases (services with line-side taps, three-phase systems, complex rapid-shutdown layouts). The NFPA NEC evolves on a three-year cycle and most AHJs in 38 US states reject SLDs that do not carry the right 690.12 labeling. The result is a designer manually reworking the auto-output before submission, which is exactly the workflow OpenSolar promises to eliminate.

The structural calculation is the third gap. A roof-mounted system in a high-wind AHJ jurisdiction needs ASCE 7-22 wind load calculations and either a stamped letter or a full structural sheet. OpenSolar does not produce stamped calculations. That work routes either to an in-house engineer or to an external bench like Heaven Designs.

The Flat-Fee Alternative

For installers running above the 80-system-per-year crossover, the flat-fee math is the cleaner business decision. SurgePV at $1,299 per user per year on the five-seat team tier covers every job the OpenSolar workflow buys, on a fixed cost rather than a percentage of revenue.

The feature set on the standard SurgePV tier includes AI 3D roof design from address, shadow analysis with module-level mismatch, NEC 2023 single-line diagrams, AutoCAD DXF export, white-label solar proposals with e-signature, and Clara AI design assistant. No transaction tax on closed deals.

For a head-to-head workflow comparison and a fast migration path off the OpenSolar lender lock-in, the OpenSolar to SurgePV migration guide walks through the cutover step by step. Most installers complete the switch inside a single sales cycle.

For installers who want to stay on OpenSolar but reduce exposure to the transaction fees, the practical path is to route financing through a direct lender relationship outside the platform’s integrated network. That preserves the design and proposal motion while removing the implicit fee on every closed deal.

How Heaven Designs Helps

The OpenSolar question and the SurgePV question both point at the same underlying bottleneck for a US installer. The design tool is solved (or solvable). The permit packet is the constraint that determines weekly install volume. That is where the Heaven Designs engineering bench plugs in.

• Solar Permit Design. PE-stamped plan sets in 4 to 7 business days across 38 US states, NEC 2023 compliant, 96.2 percent first-pass AHJ approval on residential, 94.1 percent on C&I.
• Solar Rooftop Detailed Engineering Design. Full IFC pack including GA, SLD, structural, and BOQ.
• Solar 3D Pre-Design. Sales-stage 3D and shading model delivered in 48 hours.
• Download a sample permit packet. Redacted Riverside County residential install pack.

The variable-cost permit bench plus a flat-fee design tool removes both the OpenSolar transaction tax and the in-house designer salary line at the same time. For a working quote on a state and AHJ where the team is currently running, contact us and the turnaround on a quote is under four business hours. The companion guide OpenSolar alternatives for 2026 ranks the full field for installers shopping a replacement, and Aurora Solar alternatives covers the parallel decision for installers on the Aurora stack. For a category-wide view across every platform, the solar design software pillar and the AI solar design software review go deeper. For the Indian market, the solar design software India and solar design software USA regional guides cover the same field.

FAQ

Is OpenSolar really free for solar installers?

The standard tier sticker is $0 per user per month and the platform is genuinely usable at that price for design, AI 3D roof modeling, and basic proposal. The implicit cost is the transaction fee on financed deals routed through the integrated partner lenders, which runs 0.8 to 1.5 percent of system price. An installer who finances zero deals through the platform pays nothing. An installer at typical US finance attach rates pays tens of thousands per year on volume.

How much does OpenSolar’s paid tier cost?

Public reporting puts the paid tier between $50 and $200 per user per month depending on team size and feature mix. The paid tier adds direct email support, a clean white-label proposal, custom CRM integrations, and priority feature requests. It does not eliminate the transaction-fee schedule on routed financing.

What are the hidden fees in OpenSolar?

Three categories. First, the lender transaction fee of 0.8 to 1.5 percent on financed deals routed through integrated partner lenders. Second, the hardware referral commission of 1 to 3 percent on materials BOMs routed through preferred distributors. Third, the paid add-on tier for support and white-label features. The first two are implicit (paid out of margin on closed deals). The third is direct cash.

At what volume does OpenSolar become more expensive than SurgePV?

Roughly 60 to 80 systems per year is the crossover, depending on finance attach rate and average system price. Below that, the $0 sticker on OpenSolar beats the $6,495 five-seat SurgePV team tier. Above that, the implicit fees on routed financing exceed the flat-fee SurgePV license. For a 220-system installer, SurgePV is between $35,500 and $87,500 cheaper per year on a fully-loaded basis.

Can OpenSolar produce a permit-ready packet?

Partially. The platform generates a residential single-line diagram and a design canvas that exports to PDF. The output is not consistently NEC 2023-compliant on three-phase services, line-side taps, or complex rapid-shutdown layouts. Structural calculations are not produced. For full PE-stamped permit packets across 38 US states, most OpenSolar shops either employ an in-house designer or route to an external bench like Heaven Designs at 4 to 7 business day turnaround.

Does OpenSolar work for commercial solar projects?

The platform is residential-first. C&I projects above 100 kW typically need commercial solar design features like full 8,760-hour module-level simulation, three-phase SLD with relaying, and ASCE 7-22 structural output, none of which are OpenSolar strengths. For utility-scale work the platform is not in the consideration set at all.

How do I migrate off OpenSolar without losing my project history?

The practical migration approach is to leave in-flight OpenSolar deals on OpenSolar until close, route new leads to the replacement platform from day one, and retire the lender attach inside OpenSolar at the end of the quarter. Standard inputs (module library, inverter library, brand assets) migrate cleanly on the first onboarding call with most replacement platforms. The OpenSolar to SurgePV migration guide walks through the lender deattach and the proposal rebuild step by step. Book a SurgePV demo to see the cutover live.

Does OpenSolar include 8,760-hour shading analysis?

The shading model on the residential canvas is competitive for sub-50 kW projects. For C&I work above 100 kW that requires a full 8,760-hour module-level simulation in a format a P50 report reviewer or a PVsyst peer review accepts, OpenSolar is not the right tool. SurgePV and HelioScope both ship the full simulation on their standard tier.