Which solar design software fits you?

5 questions, honest recommendation. We show Aurora, Helioscope, PVsyst, OpenSolar, SketchUp, and Diaz Editor — if a specialist fits better, we'll say so. Also doing non-solar (HVAC / electrical / structural)? Then you're in Diaz Editor's bucket — no other tool covers all 9 disciplines.

Frequently asked questions

Which solar design software is best for solo installers?

For solo installers doing residential 0-30 kW work, Diaz Editor (€197 lifetime Licence, 3 seats) and OpenSolar (free with per-proposal fees) are the best fits. Aurora, Helioscope, and PVsyst are designed for larger teams or specialised work.

What's the cheapest professional solar design software in 2026?

Diaz Editor Licence at €197 lifetime is currently the lowest total-cost option. OpenSolar is free upfront but charges per accepted proposal. PVsyst Premium is €744/year. Aurora Solar starts at $156/month.

Do I need PVsyst for permit applications?

For utility-scale or bank-financed projects: yes. For residential and small commercial in EU markets: no — Diaz Editor's PDF permit pack covers standard requirements.

Can I use multiple tools together?

Yes, and many installers do. A common stack: Diaz Editor for daily design + occasional PVsyst report for utility-scale yield validation. Tools complement each other; you don't have to pick one.

See the individual comparisons

vs Aurora Solar vs Helioscope vs PVsyst vs OpenSolar vs SketchUp Solar

What you get for €197

One-time. Lifetime. 3 seats. No subscription.

  • Diaz Editor Pro — lifetime license for your full workday
  • 3 seats — you + your foreman + your work-prep ✓
  • All trades in one tool — building, carpentry, electrical, plumbing, mechanical, solar 4 tools saved
  • DXF export — works with any architect, contractor, or installer Included
  • 1-click PDF export — quote, work-drawing, and BOM in one pack Included
  • DXF + CNC export for the workshop — cut lists, sheet layouts, mill paths Included
  • All future updates — v0.4, v0.5, v0.6... Included
  • Feedback form that reaches the developer directly Included

Built for self-employed tradespeople + small teams (1-10 people). Not for architects or utility-scale engineering — AutoCAD and Aurora are better at those.

Introductory price — goes up at v0.5:

€197 today

Buy the licence — €197 →

Stripe checkout. Instant download after payment.

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