OpenSolar Review: Features, Pricing & Pros vs Cons (2026)

TL;DR: OpenSolar is the only major solar design platform that is genuinely free forever — no seat fees, no project limits, no contracts. Based on TrustRadius reviews and direct research, users praise the fast proposals and zero cost, but U.S. teams still need AutoCAD for SLD generation (adding roughly $2,000/year and hours of manual work per project). For residential installers and budget-conscious teams, OpenSolar delivers serious value. For U.S. commercial EPCs who need complete electrical documentation, SurgePV — the leading solar design software — provides automated SLD generation, LiDAR shading, and full electrical engineering in one platform at $1,499/user/year.

Author: Keyur Rakholiya Title: Contributing Writer, SurgePV | MD & CEO, Heaven Green Energy Limited Expertise: 1+ GW solar projects delivered, 20+ design software platforms tested, 10+ years EPC operations Published: March 8, 2026 Last Updated: March 8, 2026 Review Methodology: Official OpenSolar documentation, TrustRadius verified reviews, competitive testing, independent research (Jan–Mar 2026)

Who This Review Is For

This OpenSolar review helps:

• Residential solar installers evaluating free alternatives to Aurora or SurgePV
• Budget-conscious startups building their first design workflow
• International teams (outside the U.S.) where SLD generation is not a blocker
• Commercial EPCs assessing whether OpenSolar handles their project sizes
• Teams comparing OpenSolar vs Aurora Solar, OpenSolar vs SurgePV, or looking for an OpenSolar alternative

Who should skip this review:

• U.S. commercial EPCs regularly designing above 500 kW (OpenSolar is not suitable)
• Utility-scale developers (see PVsyst or RatedPower)
• Teams requiring LiDAR-level precision for bankable project financing

What Is OpenSolar?

OpenSolar is a cloud-based solar design, simulation, and proposal platform founded in 2017 by Andrew Birch (CEO) and Adam Pryor (CTO) in Sydney, Australia. The company’s core differentiation is its free-forever business model: installers pay nothing, and OpenSolar earns revenue from hardware distributors and lenders who pay for access to the installer network.

As of 2026, OpenSolar serves more than 28,000 solar professionals across 185 countries and has supported the design of over 6 million systems, enabling roughly $10 billion in solar sales. In October 2025, Google led a $20M Series B investment, bringing total funding to $45M.

The January 2026 launch of OS 3.0 — marketed as “the world’s first free AI-powered solar operating system” — introduced Ada, an AI assistant with voice-activated design capabilities.

Company Background

Revenue Model — How “Free” Works

OpenSolar’s free model is not venture-funded altruism. Hardware distributors, financing companies, and equipment lenders pay OpenSolar for preferred placement and access to the installer network. Installers get a full-featured platform; partners get a distribution channel.

This creates an important question about data privacy: if your customer data and project pipeline are inside a platform that monetizes partner relationships, understand what data is shared and with whom before committing to OpenSolar as your primary CRM.

OpenSolar Pricing

OpenSolar Pricing 2026

OpenSolar does not charge per seat. Every team member gets full access at no cost.

The realistic hidden cost for U.S. teams: Single Line Diagram generation is not available for U.S. projects. Most U.S. commercial installers will still need AutoCAD or equivalent software to produce permit-ready electrical drawings.

Total Cost of Ownership for U.S. Commercial EPCs

Is OpenSolar Free?

Yes. OpenSolar is 100% free for standard use. There are no per-seat fees, no project caps on the free tier, and no feature gates. The platform includes design tools, CRM, proposal generation, e-signatures, and payment collection — all at no cost.

The revenue model is partner-funded: hardware distributors and lenders pay OpenSolar for distribution access. Installers pay nothing.

Optional paid extras exist:

• HD Premium Imagery: Higher-resolution aerial imagery for markets where Google Maps resolution is insufficient. Pricing is not publicly disclosed.
• Enterprise White-Label: Custom pricing for large installers or distributors wanting a branded platform.

The practical free tier limitation for U.S. users: Single Line Diagrams are only available for projects in Australia, the UK, and Germany. U.S. installers need external software (typically AutoCAD, ~$2,000/year) to produce permit-ready SLDs. This is the most significant cost OpenSolar does not advertise.

Core Features & Capabilities

3D Design Studio

OpenSolar’s design engine uses photogrammetry-based Digital Surface Models (DSM) — not LiDAR. This distinction matters. Photogrammetry derives 3D models from overlapping 2D imagery, while LiDAR uses laser pulses to measure distances directly. LiDAR produces more accurate obstruction mapping, particularly for complex roof structures or dense vegetation.

OpenSolar’s production accuracy has been validated by a U.S. government agency and PVEL, which is a meaningful endorsement. But the photogrammetry approach means shading accuracy in dense tree environments or unusual roof geometries may be less reliable than LiDAR-based platforms like Aurora Solar or SurgePV.

Key design capabilities:

• 3D roof modeling with automatic panel placement
• Real-time raytracing shading analysis
• Inverter stringing and tracking system support
• Battery storage integration
• 500 kW maximum in 3D mode (2D mode available up to 1 MW with reduced functionality)
• Equipment library covering modules, inverters, and BOS components

Ada AI — Voice-Activated Design (OS 3.0)

The January 2026 OS 3.0 release introduced Ada, OpenSolar’s AI assistant. Ada supports voice-activated design commands, auto-generates multiple system configurations in seconds, and includes AI-powered lead generation tools. This is a genuine industry first — no competitor currently offers voice-activated solar design at comparable maturity.

Electrical Engineering — Critical Gap for U.S. Market

This is OpenSolar’s most significant limitation for the U.S. market.

For Australian, UK, and German teams, OpenSolar does generate SLDs natively. U.S. installers designing commercial systems with permit requirements are producing their electrical documentation in AutoCAD or similar tools alongside OpenSolar.

Proposals — The “Sales Machine”

OpenSolar calls its proposal system the “Sales Machine.” It generates interactive, lifestyle-oriented web-based proposals with real-time pricing updates, e-signature collection, and mobile-responsive display. The system supports multiple financial models: cash, loan, lease, and PPA.

Design-to-signed-contract in under one hour is a realistic claim for experienced users on straightforward residential systems. The 2-minute proposal generation figure refers to the time from completed design to a shareable proposal link.

Payment types supported:

• Cash purchase
• Solar loans (via financing partner integrations)
• Lease
• PPA (Power Purchase Agreement)

CRM and Project Management

OS 3.0 added a Kanban-style CRM view with task management and pipeline tracking. This is built natively into the platform — no third-party CRM integration required for basic lead management.

For larger teams with enterprise CRM needs, OpenSolar integrates with Salesforce and HubSpot via Snapfrozen (a third-party connector), and with Zapier for broader workflow automation.

Integrations

Mobile Apps

Full iOS (iOS 10.0+) and Android (5.0+) apps support complete design workflows, sales presentations, e-signature collection, and material ordering. This is a genuine advantage over platforms where mobile access is limited to viewing.

User Reviews & Feedback

OpenSolar’s formal review presence is limited compared to Aurora or Arka360. TrustRadius lists an 8.0/10 rating from a small sample. The platform does not appear on Capterra. G2 has a listing but detailed aggregate scores are not publicly accessible.

What Users Praise

One TrustRadius reviewer notes: “Easy to use, quick to design and calculations are accurate. We have never found it easier to train new hires than with OpenSolar.”

Top Criticisms

OpenSolar Ratings

The limited review count on public platforms makes it harder to draw statistically meaningful conclusions. The consistent praise across independent blog reviews and the platform’s 28,000-user base suggest overall satisfaction among its target market (residential residential + light commercial).

Pros & Cons

Pros

1. Genuinely Free — No Hidden Seat Fees

OpenSolar is the only major solar design platform at $0 for the full feature set. Aurora Solar runs $135–$220 per user per month. PVsyst costs $647/year. For startups or solo installers, the cost difference is material. No contracts, no feature gating, no seat counts.

2. Ada AI — Industry-First Voice Design

The OS 3.0 Ada AI assistant is a genuine product differentiator. Voice-activated design commands and auto-generation of multiple system options in seconds have no direct equivalent in the solar design software market as of early 2026. For sales-oriented teams, this cuts design time on standard residential systems from minutes to seconds.

3. All-in-One Platform

Design, CRM, proposals, e-signatures, and payment collection in a single system. Competitors often require three to four separate tools to cover the same workflow. For residential-focused installers, OpenSolar eliminates the tool-switching cost and integration complexity.

4. Fast Sales Cycle

The claim of “first contact to signed contract in under 1 hour” is credible for straightforward residential systems. The combination of fast design (Ada AI), instant interactive proposals, and built-in e-signature makes this achievable in practice.

5. Proven Global Scale

28,000+ users across 185 countries with 6 million designs created and $10B in solar sales enabled. The platform’s accuracy is validated by a U.S. government agency and PVEL — meaningful third-party endorsements. The Google-led Series B provides financial stability most free platforms lack.

Cons

1. No U.S. SLD Generation

The most significant limitation for U.S. commercial work. SLDs (Single Line Diagrams) are available for Australia, UK, and Germany — but not the U.S. market. U.S. EPCs producing permit packages still need AutoCAD or equivalent software, adding both software cost and hours of manual drawing work per project.

2. 500 kW Project Cap (3D Mode)

OpenSolar’s 3D design engine degrades above 500 kW. Users report slow simulations, calculation errors, and system instability on larger projects. Projects from 500 kW to 1 MW can use 2D design mode with significantly reduced functionality. The platform is not suitable for utility-scale or megawatt-class projects.

3. Photogrammetry, Not LiDAR

OpenSolar uses photogrammetry-based DSM, not LiDAR. For most residential systems with clear roof geometry, this is adequate. For complex shading scenarios with irregular obstructions, dense trees, or unusual roof angles, LiDAR-based platforms like Aurora Solar or SurgePV will produce more accurate production estimates. The difference is most pronounced in projects where shading losses materially affect financial viability.

4. Data Privacy and Partner Model

OpenSolar’s revenue comes from hardware distributors and financing companies who pay for access to the installer network. This means the platform has a financial interest in presenting certain products and financing options to installers. Understand what customer and project data is shared with these partners before committing your full CRM and pipeline to the platform.

5. Web-Only, No Offline Mode

OpenSolar requires an active internet connection. Field assessments in areas with poor connectivity are not supported. This is a genuine operational constraint for installers doing on-site work in rural or low-coverage areas.

6. One Module Manufacturer Per Project

OpenSolar does not support mixed module manufacturers within a single project design. This limits flexibility for large commercial projects where panel specifications might change partway through or require alternatives from different manufacturers.

OpenSolar vs SurgePV

Both platforms serve solar installers, but they target different ends of the market.

Head-to-Head Feature Comparison

Workflow Time Comparison — 100 kW Commercial Rooftop (U.S.)

At scale (50 commercial projects/month):

• Monthly time saved: 75–125 hours
• Annual labor value (at $75/hour): $67,500–$112,500
• Software cost saved: $2,000/year (no AutoCAD)

Annual Cost Comparison

For residential-only teams: OpenSolar at $0 clearly wins on cost. For U.S. commercial EPCs needing SLD documentation: SurgePV at $1,499/user/year is less expensive than the OpenSolar + AutoCAD + labor stack.

When OpenSolar Wins

OpenSolar is the stronger choice for:

• Residential-only installers who do not produce permit-ready electrical documentation
• Teams outside the U.S. where SLD generation is available natively (AU, UK, DE)
• Budget-constrained startups where $0 cost is the primary constraint
• International markets across the 185 countries OpenSolar serves

When SurgePV Wins

SurgePV is the stronger choice for:

• U.S. commercial EPCs requiring permit-ready SLD documentation
• Teams regularly designing above 500 kW
• Projects requiring carport design, trackers, or East-West racking
• Teams needing bankable accuracy documentation (±3% vs PVSyst)
• EPCs where the AutoCAD + manual electrical labor cost exceeds $1,499/year

OpenSolar Alternatives

Aurora Solar

Aurora Solar is OpenSolar’s closest direct competitor for residential design, but at a substantially higher price ($135–$220/user/month). Aurora uses proprietary aerial imagery and LiDAR-based shading, producing more accurate results for complex residential shading. It generates SLDs for the U.S. market. Best for residential-focused teams willing to pay for precision and proposal polish. See our Aurora Solar review for a full comparison.

SurgePV

SurgePV targets commercial EPCs and installers who need complete electrical engineering alongside design and proposals. Automated U.S. SLD generation, LiDAR shading, native carport and tracker support, and a full solar proposals system make it the most comprehensive all-in-one platform for commercial work. At $1,499/user/year, it costs less than the OpenSolar + AutoCAD stack for U.S. commercial teams. Read how solar design software compares across platforms at SurgePV.

HelioScope

HelioScope (acquired by Folsom Labs, now part of Aurora Solar) is a simulation-first platform with strong accuracy for commercial-scale projects. It uses bankable energy modeling and integrates well with PVsyst. Less sales-focused than OpenSolar but better for engineering-grade commercial simulation. Best for engineers who need rigorous energy modeling rather than rapid residential proposals. See the HelioScope review for details.

PVsyst

PVsyst is the industry standard for bankable energy simulation — used by project financiers, independent engineers, and utility-scale developers. At $647/year, it is narrowly focused on simulation (no proposals, no CRM, no SLD generation). OpenSolar and PVsyst serve completely different use cases. See the PVsyst review.

Arka360

Arka360 is an all-in-one platform with a native built-in CRM — the only major competitor with this feature. It is primarily India-focused. It does not generate U.S. SLDs. For India-based residential installers, Arka360 is a strong alternative to OpenSolar. For U.S. teams, neither platform addresses the SLD gap without AutoCAD. See the Arka360 review.

SolarEdge Designer

SolarEdge Designer is a free, manufacturer-specific design tool best used for projects specifying SolarEdge inverters. It provides inverter and optimizer sizing, system performance simulation, and basic proposal output. The key limitation: it is tied to SolarEdge equipment and not suitable for multi-brand or multi-inverter projects.

Who Should Use OpenSolar?

Best Fit for OpenSolar

Residential Installers Outside the U.S. Teams in Australia, the UK, Germany, and other international markets where SLD generation is available natively. OpenSolar’s free model eliminates software cost entirely for these teams.

Budget-Constrained Startups New solar businesses that need a full-featured platform immediately at zero cost. OpenSolar’s free tier includes everything needed to go from site assessment to signed contract without spending on software.

Sales-First Teams Prioritizing Speed Teams where the sales cycle is the primary bottleneck. OpenSolar’s Ada AI and Sales Machine proposals are purpose-built for speed — from first contact to signed contract in under an hour is a real, achievable metric.

International Installers Needing Global Coverage 28,000+ users across 185 countries, multi-currency support, and a platform maintained for diverse international regulatory environments. No competing free platform comes close in global reach.

Small Residential Teams Without Existing CRM The OS 3.0 Kanban CRM gives small teams basic pipeline management without a separate CRM subscription.

Not a Good Fit for OpenSolar

U.S. Commercial EPCs (above 100 kW with permit requirements) The SLD gap is a genuine operational blocker. These teams will spend more on AutoCAD and manual SLD labor than a paid platform costs.

Projects Above 500 kW The design cap is a hard constraint, not a soft one. Performance issues above this threshold affect both workflow speed and calculation reliability.

Teams Requiring Bankable Precision LiDAR-based platforms produce more reliable shading results for complex sites. If a project financier will independently verify production estimates, photogrammetry-based modeling may not meet their accuracy standard.

Utility-Scale Developers OpenSolar is explicitly designed for residential and light commercial work. Utility-scale projects need dedicated tools like PVCase, RatedPower, or PVsyst.

Frequently Asked Questions

Is OpenSolar really free?

Yes. The core platform is 100% free with no time limit, no seat cap, and no feature gating. The business model relies on payments from hardware distributors and lenders, not from installers. Optional paid add-ons include HD Premium Imagery bundles (pricing not disclosed) and an Enterprise white-label tier.

The practical limitation for U.S. users: OpenSolar does not generate SLDs for U.S. projects. Most U.S. commercial installers need AutoCAD (around $2,000/year) for permit-ready electrical documentation.

What is OpenSolar pricing in 2026?

OpenSolar has no paid subscription tier for standard use. All core features are free. Compare to competitors: Aurora Solar at $135–$220 per user per month ($1,620–$2,640/year), PVsyst at $647/year, or SurgePV at $1,499/user/year with full electrical engineering included.

Does OpenSolar work for commercial solar projects?

For light commercial work under 500 kW, yes. OpenSolar handles projects up to 500 kW in 3D mode with acceptable performance. Above this threshold, performance degrades noticeably, with users reporting slow simulations and calculation errors.

OpenSolar does not support carport solar design, solar trackers, or East-West racking — structures that are common in commercial portfolios. U.S. commercial projects also require external tools for SLD generation.

How does OpenSolar compare to Aurora Solar for residential design?

Aurora Solar uses higher-resolution proprietary aerial imagery and LiDAR-based shading, providing more accurate production estimates for complex residential shading scenarios. It also generates U.S. SLDs natively. OpenSolar is free; Aurora costs $135–$220/user/month. For teams where design accuracy and SLD generation justify the cost, Aurora has a technical edge. For teams where zero cost and speed are the priorities, OpenSolar wins.

What is the OpenSolar 500 kW limit?

The 3D design studio handles projects up to 500 kW. Above this threshold, simulations slow significantly and calculation accuracy becomes unreliable. Projects from 500 kW to 1 MW can be completed in 2D design mode with reduced functionality. OpenSolar is not rated or recommended for utility-scale projects.

Is OpenSolar safe for customer data?

OpenSolar’s revenue comes from partners — hardware distributors and lenders — who pay for access to the installer network. Before using OpenSolar as your primary CRM and customer database, review OpenSolar’s privacy policy and data sharing agreements to understand what project and customer data flows to commercial partners.

Can I switch from OpenSolar to SurgePV?

Yes. The migration path is straightforward for design data and customer information. SurgePV provides dedicated onboarding support. Teams moving from OpenSolar to SurgePV typically complete the transition in 2–3 weeks.

The workflow improvement for U.S. commercial EPCs is immediate: automated SLD generation replaces manual AutoCAD work, LiDAR shading replaces photogrammetry, and carport and tracker design become available natively.

What is the best OpenSolar alternative for U.S. commercial EPCs?

For U.S. commercial work requiring permit-ready SLD documentation, SurgePV is the most direct alternative. At $1,499/user/year, it costs less than the OpenSolar + AutoCAD + SLD labor stack for teams doing more than a handful of commercial projects per month. Full solar design software comparison is available on the SurgePV platform page.

Final Verdict

OpenSolar Executive Summary

Strengths:

• 100% free with no seat limits or feature gates — genuine market differentiation
• Ada AI voice-activated design: industry first, meaningful for residential sales teams
• All-in-one platform eliminating CRM, proposals, and e-signature tool costs
• Strong global reach: 185 countries, 28,000+ users, multi-currency support
• Google-backed with $45M in funding and Deloitte Fast 50 recognition
• Third-party validated accuracy (U.S. government agency + PVEL)

Limitations:

• No U.S. SLD generation — AutoCAD required for U.S. permit packages
• 500 kW hard cap in 3D mode — not suitable for medium-large commercial
• Photogrammetry DSM, not LiDAR — less accurate for complex shading
• Data privacy considerations from partner-funded revenue model
• One module manufacturer per project
• Web-only, no offline mode

The Decision Framework

Choose OpenSolar when:

• You are operating outside the U.S. (or doing residential-only work without SLD requirements)
• Budget is the primary constraint and $0 vs $1,500+/year is a real business decision
• Your team is residential-focused and proposal speed is the main productivity lever
• You want fast onboarding with minimal training investment

Choose SurgePV when:

• You are a U.S. commercial EPC that produces permit packages with SLDs
• Projects regularly exceed 500 kW or include carport, tracker, or East-West designs
• Bankable accuracy documentation is required for project financing
• The OpenSolar + AutoCAD + labor cost exceeds $1,499/user/year (it will for most teams doing 10+ commercial projects/month)

Value Analysis

For residential-only teams, OpenSolar’s value proposition is strong. Zero cost, fast proposals, built-in CRM, and AI design tools deliver real value without a software budget.

For U.S. commercial EPCs, the math changes. A U.S. team producing permit-ready packages needs AutoCAD (~$2,000/year) alongside OpenSolar. Each SLD requiring manual AutoCAD work adds 2+ hours of engineering time. At 50 projects per month and $75/hour labor cost, that is roughly $7,500/month in manual SLD labor — $90,000/year in productivity cost from a “free” tool.

SurgePV at $1,499/user/year automates SLD generation in 5–10 minutes per project, adds LiDAR shading, and covers carport and tracker design. For commercial teams, the return on $1,499/year is straightforward.

Take the Next Step

See how SurgePV’s automated electrical engineering, LiDAR shading, and commercial structure support compare to OpenSolar for your project types.

• Book a demo — Walk through a commercial project with SLD generation and carport design
• Compare platforms — See all software reviews and comparisons
• Solar shadow analysis software — LiDAR shading vs. photogrammetry: what the accuracy difference means for your projects
• Solar proposal software — How SurgePV proposals compare to OpenSolar’s Sales Machine
• Generation and financial tool — Full ROI and financial modeling for your solar projects

Related Resources

Platform Comparisons:

• Aurora Solar Review — LiDAR precision vs. OpenSolar’s photogrammetry
• PVsyst Review — Bankable simulation for larger projects
• Arka360 Review — India-focused alternative with built-in CRM

Feature Deep Dives:

• Solar Designing — Complete solar design software guide
• Shadow Analysis — LiDAR shading tools explained
• Solar Proposals — Proposal platform comparison
• Generation and Financial Tool — Financial modeling for solar projects

This OpenSolar review was written by Keyur Rakholiya, Contributing Writer at SurgePV and MD & CEO of Heaven Green Energy Limited, with 1+ GW of solar project experience and hands-on testing of 20+ design software platforms. All OpenSolar information is sourced from official OpenSolar documentation (opensolar.com), TrustRadius verified reviews, and independent research conducted January–March 2026. We maintain editorial independence and disclose our company affiliation transparently.

Review last updated: March 8, 2026 | Next review: June 2026