Software and tools that help solar EPCs design systems that don't need repairs later.
6 in-depth guides
An independent review of SolarDraft, the browser-based 3D solar design, proposal and CRM software for Indian EPCs — what it does well, where it falls short, what it costs, and who should choose an alternative.
Free solar string sizing calculator for Indian conditions. Enter module and inverter datasheet values to find the safe range of modules per string — checked against cold-morning Voc, hot-afternoon Vmp and inverter current limits — with the method explained.
An independent review of Solar Designer (solardesigner.in), the browser-based 3D rooftop solar designer that produces a full drawing pack, SLD and bill of materials — strengths, limitations, and who should choose an alternative.
A practical, step-by-step guide for installers designing residential rooftop solar under PM Surya Ghar — sizing from the electricity bill, roof area, DCR modules, string and cable design, earthing, subsidy-aware proposals and the paperwork that gets approved first time.
A practical checklist of the drawings and documents Indian DISCOMs typically need for rooftop solar net metering and PM Surya Ghar — what a good single-line diagram, site plan and earthing layout contain, and the most common reasons files get sent back.
A data-backed 2026 ranking of 3D solar design software for Indian solar EPCs, built on MNRE and PM Surya Ghar market data and a transparent weighted scoring method. SolarDraft ranks No. 1, Solar Designer No. 2.