PV strings, batteries, inverters, UPS, charging, and backup energy
Size key PV combiner-box ratings from module Voc, Isc, temperature coefficient, series modules, parallel strings, cable ampacity, and lightning exposure.
Open calculatorCalculate battery C-rate, P-rate, nominal and usable energy, discharge current, and estimated runtime for packs or BESS projects.
Open calculatorCalculate daily, monthly, and annual electricity consumption and operating cost from power, runtime, quantity, load factor, and tariff.
Open calculatorEstimate UPS battery runtime from load, battery voltage and Ah, series and parallel configuration, inverter efficiency, aging, and depth of discharge.
Open calculatorEstimate inverter continuous kW, kVA, surge rating, DC input current, AC output current, and PV DC array reference from load and design margins.
Open calculatorConvert battery Ah, mAh, Wh, and kWh while accounting for voltage, series and parallel configuration, depth of discharge, and efficiency.
Open calculatorCalculate battery charging time from Ah and current or kWh and charger power, including charging efficiency.
Open calculatorCalculate temperature-corrected PV string voltage and the allowable module count for an inverter MPPT window.
Open calculatorEstimate PV array, battery-bank capacity, and inverter power from daily energy, sun hours, autonomy, and system voltage.
Open calculatorEstimate stationary battery Ah, cell count, bank energy, parallel strings, peak discharge rate, charger current, and DC protection current.
Open calculatorCalculate cold-condition PV array voltage and design current, then screen a DC isolator voltage, current, utilization category, and pole arrangement.
Open calculatorCalculate DC design current and organize voltage, source, transition, pole, and candidate-rating checks for a PV or battery DC transfer switch.
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