Helioscope Software Free ^hot^
Good for practice, not for production.
Take advantage of the 14-day trial for HelioScope to learn high-level skills, then apply them to free tools. Conclusion helioscope software free
The solar industry is moving toward open data. NREL continues to release free tools (like REopt for battery storage). Meanwhile, OpenSolar is aggressively challenging paid incumbents by offering core features for free. Good for practice, not for production