Why ranked: Its own site says: “Residential solar design and sales solutions that are accurate at every stage, from design to signed permit, with physics-based accuracy.” We placed it 1st of 5 on fit for this task. No free plan confirmed; paid from Premium $259/user/mo billed monthly ($220 annual).
Why ranked: Its own site says: “OpenSolar connects homeowners, solar professionals, and partners with free software to design, sell, and manage fast, accurate solar projects.” We placed it 2nd of 5 on fit for this task. Pricing unverified.
Fit 8.5 · value 5.0 · breadth 6 · availability 10 (how we score) · no readable pricing page · site live
Why ranked: Its own site says: “Solargraf helps solar professionals design systems, create interactive proposals, manage financing and automate permitting from one powerful platform.” We placed it 3rd of 5 on fit for this task. No free plan confirmed; paid from Starter $2,799/yr (as listed).
Why ranked: Its own site says: “Enerflo is the operating system for residential solar — connecting your solar CRM, design tools, financing, contracting, and project management into one infrastructure layer.” We placed it 5th of 5 on fit for this task. Pricing unverified.
Fit 4.0 · value 5.0 · breadth 6 · availability 10 (how we score) · no readable pricing page · site live
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FAQ
What is the best AI tool to solar design and proposals?
By TaskRanking's published rubric, Aurora Solar ranks first, followed by OpenSolar and Solargraf (Enphase).
Is there a free AI tool to solar design and proposals?
None of the top 5 had a confirmed free tier when we checked on 2026-10-13.
How are these tools ranked?
Score = 50% fit, 25% value (from vendor pricing pages), 15% breadth, 10% availability. Sponsorship never affects rank.