First-principles electrical engineering calculators calibrated with real-world inverter conversion efficiency, motor inrush multipliers, and cold-temperature solar coefficients.
Calculate real-world battery backup runtime for refrigerators, CPAP, Starlink, sump pumps, and medical gear with inverter loss modeling.
Model cycling compressor draw (30%โ40% duty cycle) plus defrost heater surge spikes to determine how many days your food stays safe.
Calculate Locked Rotor Amps (LRA) and 3xโ5x inductive startup current to prevent catastrophic inverter overload shutdowns.
Determine winter temperature open-circuit voltage spikes to protect expensive MPPT controllers from being destroyed by array overvoltage.
Measure how much battery energy is wasted by simply leaving the AC inverter turned on overnight with zero load connected.
Calculate the total wattage of solar panels needed to recharge your power station within your local peak sun hours.