Solar Panel Sizing Calculator
Array kW = annual kWh / (365 × peak sun hours × 0.80 derate).
About this tool
Solar Panel Sizing Calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Trade & Construction Calculators. Browse more Trade & Construction Calculators tools.