Check your PV string in 30 seconds — pick a solar panel and inverter, set the temperature range, and instantly see if the configuration is safe.
This calculator checks whether your solar panels and inverter are electrically compatible across real-world temperature conditions. It performs 7 safety and performance checks based on IEC 62548 and NEC 690.7 standards — the same methodology used by professional solar engineers and tools like PVsyst.
Checks include maximum DC voltage safety, MPPT voltage range verification, and short-circuit current limits. Temperature coefficients from the panel datasheet are used to calculate worst-case voltage at your coldest and hottest expected temperatures.
This solar string sizing calculator is designed for homeowners planning a DIY solar installation, self-builders who want to verify their design before purchasing equipment, and professional solar installers who need a quick compatibility check. Whether you are connecting 4 panels or 40, the calculator uses the same engineering methodology as professional design software — but with a simple, beginner-friendly interface that requires no electrical engineering background.
All calculations follow IEC 62548 (photovoltaic array design) and NEC 690.7 (solar PV systems) standards. Temperature-adjusted voltage and current values are computed using manufacturer-specified temperature coefficients from the panel datasheet. The methodology matches PVsyst-level accuracy: worst-case voltage is calculated at your coldest expected ambient temperature, and worst-case current at your hottest temperature with NOCT-based cell temperature adjustment. Advanced options include bifacial gain, panel tolerance, and orientation-aware current correction using solar geometry.
Enter your equipment specs above and get instant results — no registration required.
