Editor In Chief Estimate the converted generator output when changing between single-phase and three-phase service using voltage, current, power factor, and efficiency. The calculator returns the target phase real power in kilowatts.
Estimate the required generator output circuit current based on generator power, voltage, power factor, phase type, and continuous load sizing. This helps size the output circuit for generator-fed loads using common electrical calculation practices.
Estimate the required three-phase generator size in kVA based on total load, line voltage, power factor, future expansion margin, and motor starting allowance.
Estimate the minimum recommended split-phase generator capacity in watts based on 120/240V load, motor starting surge, and a safety margin.
Estimate the required generator wattage for a 240V load using current, power factor, efficiency, and a startup surge multiplier. Useful for sizing generators for motors, pumps, compressors, welders, and other 240-volt equipment.
Estimate the running wattage needed for a 120-volt generator based on the appliances you plan to power, their quantity, and startup surge requirements.
Estimate generator wattage for a 50 amp electrical service based on voltage, continuous load percentage, power factor, and safety headroom. This calculator helps size a generator for RV, home backup, or jobsite applications by converting amps and volts into recommended running wattage.
Estimate running wattage for a 30 amp generator based on voltage, power factor, and a recommended surge margin for startup loads. This helps determine continuous and practical generator output capacity.
Estimate the available amperage from a generator outlet based on generator running watts, outlet voltage, power factor, and a continuous load safety factor. This helps determine how many amps an outlet can supply for typical sustained use.
Estimate the total electrical load on a generator receptacle by combining running wattage, starting surge, and a continuous-load safety factor. Use this to compare connected equipment demand against a generator receptacle’s practical load level.
Estimate the recommended propane tank size for a generator based on electrical load, generator efficiency, desired runtime, and reserve capacity. The calculation converts expected power draw into propane gallons needed and adds a reserve margin for practical tank sizing.
Estimate the recommended automatic transfer switch size in amperes based on system voltage, phase, load, continuous load factor, and future capacity margin.
Estimate the minimum equipment grounding conductor size for a generator installation based on generator output current, overcurrent protection rating, conductor material, insulation temperature rating, and installation conditions. This calculator provides an estimated grounding wire size in circular mils for comparison and planning.
Calculate estimated voltage drop for a generator cable run based on load current, one-way cable length, system voltage, conductor material, and cable size resistance factor.
Calculate estimated voltage drop for a generator-fed circuit using load current, one-way cable length, conductor size, conductor material, and system voltage. The calculation uses standard resistivity values and returns the voltage drop as a percentage of system voltage.
Estimate the minimum extension cord wire gauge needed for a generator based on running wattage, cord length, supply voltage, and allowable voltage drop.
Estimate the required copper generator cable cross-sectional area based on generator load, system voltage, phase type, cable run length, and allowable voltage drop.
Estimate the minimum copper conductor size needed for a generator feeder based on generator output, voltage, phase, one-way run length, and allowable voltage drop.
Estimate the recommended generator fuse size based on generator power, voltage, phase, power factor, and continuous load margin. The calculation converts generator kW to current and applies a safety margin to help size the fuse.
Calculate a recommended generator output breaker size in amps based on generator capacity, voltage, phase, continuous load factor, and code sizing margin.
Estimate the minimum transfer switch amp rating needed for a generator installation based on generator output, voltage, phase, continuous loading, and safety margin.
Estimate the battery capacity in watt-hours needed for a portable power station based on device wattage, quantity, daily runtime, days of use, and efficiency reserve.
Estimate the recommended generator size needed to support an inverter system based on inverter continuous power, surge load, inverter efficiency, and desired headroom. This calculator helps size a generator in watts so it can reliably supply the inverter and connected loads.
Estimate the minimum generator size needed to run a battery charger based on battery bank voltage, charger current, charger efficiency, and desired generator headroom.
Estimate how long it will take a generator to charge a battery based on battery capacity, current state of charge, charger output, battery chemistry, and charging efficiency losses.
Estimate the time required to charge a battery bank with a generator based on battery capacity, current state of charge, target state of charge, charger current, and charging efficiency.
Estimate how long it will take to charge a solar generator based on battery capacity, current battery level, solar panel input, charging efficiency, and average sun hours factor.
Estimate how long a solar generator can power your devices based on battery capacity, device wattage, inverter efficiency, battery depth of discharge, and solar input.
Estimate the recommended solar generator battery capacity based on your daily energy use, desired backup duration, depth of discharge, and inverter efficiency.
Estimate the required battery backup system size in watt-hours based on your essential load, desired runtime, inverter efficiency, and backup reserve.