Electricity Calculator Group

Solar Electricity Calculators

Estimate photovoltaic production, array layout, controllers, storage, and project economics.

Choose the electrical result you need

Use site-specific irradiance, temperature, shading, equipment limits, and measured system losses.

Open the calculator whose primary output matches the decision at hand. Each worksheet shows its formula, loaded example, input definitions, limitations, and related calculations.

Solar Electricity worksheets

Solar Irradiance PowerCalculate array power for a defined electrical case.Solar Panel Temperature LossCalculate adjusted panel power for a defined electrical case.Solar Daily EnergyCalculate daily solar energy for a defined electrical case.Solar Array ConfigurationCalculate total modules for a defined electrical case.Solar String VoltageCalculate string voltage for a defined electrical case.Solar Inverter SizeCalculate suggested inverter rating for a defined electrical case.Solar Charge ControllerCalculate controller output current for a defined electrical case.MPPT Voltage WindowCalculate available voltage margin for a defined electrical case.PWM Controller LossCalculate pWM power loss for a defined electrical case.Solar Battery ChargingCalculate charge time for a defined electrical case.Off-Grid Solar ArrayCalculate required array size for a defined electrical case.Off-Grid Battery BankCalculate required storage for a defined electrical case.Solar AutonomyCalculate autonomy duration for a defined electrical case.Solar Panel TiltCalculate seasonal tilt estimate for a defined electrical case.Solar Row SpacingCalculate minimum row spacing for a defined electrical case.Solar Shading LossCalculate energy after shading for a defined electrical case.Solar Azimuth LossCalculate azimuth-adjusted energy for a defined electrical case.Solar DC Cable LossCalculate dC cable loss for a defined electrical case.Solar Performance RatioCalculate performance ratio for a defined electrical case.Solar PaybackCalculate simple payback for a defined electrical case.

Use ratings and measurements deliberately

Keep voltage type, current path, frequency, phase arrangement, operating time, and temperature with the result. A value taken from a nameplate may describe a different condition from a meter reading.

These calculators support arithmetic and comparison. They do not replace electrical codes, equipment instructions, qualified design, safe isolation, or test procedures.