In-Depth Reviews of Top Solar Design Software

Good for India-focused residential teams needing built-in CRM, but limited electrical engineering and missing commercial structures hold it back for multi-market EPCs.

Industry-leading AI roof modeling and sales proposals for US residential installers, but expensive, US-centric, and missing automated electrical engineering for commercial EPCs.

AutoCAD is the industry-standard CAD platform adapted for solar through third-party plugins — unmatched for construction-document precision, but it requires manual SLD workflows (2–3 hours each), has no native shading or energy modeling, and costs $1,865–$3,120/year before plugins.

Capable Windows desktop PV software with solid SLD generation and a low one-time price, but desktop-only architecture, European focus, and near-zero public user reviews make it a niche choice in 2026.

Strong all-in-one platform for international installers with a unique customer app, but limited electrical engineering, no carport support, and higher per-user pricing make it a hard sell for US-focused commercial EPCs.

The gold standard for C&I solar-plus-storage financial modeling, but no design tools means you're always paying for a second platform.

Fast, accurate residential solar proposals with managed design — but residential-only scope, no electrical engineering, and per-proposal pricing that scales steeply make it a poor fit for commercial EPCs or growing teams.

Strong C&I simulation tool with DNV GL-validated accuracy and fast design iterations, but weak electrical engineering, a 15 MW cap, and a 10-project monthly limit make it a poor fit for high-volume EPCs.

The industry standard for microgrid and off-grid hybrid system optimization — powerful simulation rigor with a steep learning curve, Windows-only constraint, and no native design tools.

Fast, affordable residential permit package automation acquired by Aurora Solar in 2024 — ideal for small US installers, but limited to residential rooftop, US-only, and its standalone future is uncertain post-acquisition.

OpenSolar is the only major solar design platform that is genuinely free for residential and light commercial work, but U.S. users still need AutoCAD for SLD generation and the 500 kW design cap rules it out for utility-scale projects.

Solid free solar design tool for Australian residential installers, but beta status, missing electrical engineering, and residential-only scope make it unsuitable for commercial EPCs.

Pipe Solar is a fast, usage-based solar proposal and CRM platform built for residential installers — ideal for lower-volume teams avoiding monthly subscriptions, but too limited for commercial EPCs needing electrical engineering.

Engineering-grade solar simulation software with best-in-class hybrid system modeling, but desktop-only Windows architecture, no automated SLD generation, and a dated UI make it a poor fit for modern commercial EPCs.

PVCase is the leading AutoCAD-based solar design platform for utility-scale developers, delivering 80–90% design time savings, but its desktop dependency, steep learning curve, and missing electrical automation make it a poor fit for commercial EPCs needing a complete workflow.

Strong AutoCAD-native engineering for utility-scale developers, but the four-product portfolio, AutoCAD dependency, and near-zero review presence make it a poor fit for cloud-first commercial EPCs.

The bankability gold standard for utility-scale simulation — but Windows-only, simulation-only, and requiring 4–6 weeks to learn makes it a poor daily driver for commercial EPCs.

NREL's free government solar calculator is the best tool for quick preliminary estimates, but it has no design, electrical engineering, or proposal capabilities — making it insufficient for commercial EPCs.

Pylon (GetPylon) is the best pay-per-project solar design tool for Australian residential installers — but its limited electrical engineering and commercial depth make it a poor fit for EPCs handling projects above 100kW.

The best utility-scale solar design platform for teams running 5 MW+ projects — but it's expensive, opaque on pricing, and entirely wrong for commercial or residential work.

A powerful BIM platform for architects doing building-integrated solar, but a poor fit for solar EPCs needing production calculations, SLD generation, and proposals — at $3,030+/year with a 6–12 month learning curve.

SAM is the gold standard for free techno-economic simulation — NREL-backed, banker-accepted, and genuinely powerful — but it cannot design systems, generate SLDs, or produce proposals, so commercial EPCs need a separate design platform alongside it.

Scanifly is the best drone-first solar design platform for accuracy-sensitive projects, but its design-only scope means you'll need 3–4 additional tools to run a complete workflow.

The best 3D visualization tool in solar design — but it requires Skelion Pro, PVsyst, and AutoCAD to function as a complete workflow, making it a multi-tool stack rather than standalone software.

Fast, affordable residential permit software with a proven 700,000+ design track record — but the platform has largely transitioned to Lyra Solar, leaving its long-term availability uncertain. Ideal for budget-conscious residential installers needing quick permit packages.

Free, DNV GL-validated solar design tool that works well for SolarEdge-exclusive residential installers — but hardware lock-in, no SLD generation, and limited shading analysis make it unsuitable for multi-brand or commercial work.

Fast proposals and clean Enphase integration for residential sales teams, but shading inaccuracies, permit revision rates, and project-credit pricing make it a poor fit for commercial EPCs or high-volume operations.

A capable BIM-integrated solar design tool built for European engineering workflows, but its Windows-only desktop architecture, IEC-only electrical standards, and steep learning curve limit its value for cloud-first teams and US commercial EPCs.

Fast, user-friendly solar proposal software built for European residential installers — strong for quick quotes and multi-product sales, but Europe-only coverage and no advanced engineering limit its appeal outside that niche.

Capable Australian solar design platform with best-in-class AS/NZS compliance and a unique Smart Energy Simulator, but limited international coverage and a kW-credit pricing model make it a poor fit for US/India EPCs.

A solid proposal tool for Australian residential installers needing compliance and speed, but the Australia-only focus and missing electrical engineering features limit its use for commercial EPCs and international operations.

A capable all-in-one platform for EMEA/MENA solar teams needing lead generation and 4-in-1 feasibility analysis, but limited social proof, no mobile app, and per-project pricing that scales quickly hold it back.

Strong all-in-one CRM for solar door-to-door sales teams, but lacks electrical engineering, advanced design tools, and pricing transparency — limiting its appeal beyond residential field operations.

Solid European simulation tool with strong BIM integration and a free tier for small projects, but limited public reviews, annual-only billing, and a European-first focus make it a niche pick outside France and its neighboring markets.

A strong CAD-native tool for European utility-scale EPCs, but the AutoCAD dependency, steep learning curve, and ~$5,100/year total cost make it impractical for most commercial solar teams.