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.
For solo installers doing residential 0-30 kW work, Diaz Editor (€99 lifetime founding) and OpenSolar (free with per-proposal fees) are the best fits. Aurora, Helioscope, and PVsyst are designed for larger teams or specialised work.
Diaz Editor founding beta at €99 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.
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.
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.
One-time. Lifetime. 3 seats. No subscription.
Built for self-employed tradespeople + small teams (1-10 people). Not for architects or utility-scale engineering — AutoCAD and Aurora are better at those.
Regular price (after founding):
€1.000 €99 today
100 spots total. Stripe checkout. Instant download after payment.