sts calculator
STS Calculator – Solar Thermal System Efficiency & Sizing Tool STS Calculator Professional Solar Thermal System Performance Estimator Average Solar Irradiance (kWh/m²/day) Standard range: 3.0 to 7.5 depending on location. Please enter a positive value. Total Collector Area (m²) Net aperture area of all solar collectors. Value must be greater than 0. System Efficiency (%) … Read more