Calculate DC power, energy and running cost from voltage and current.
DC power is a straight product of voltage and current with no power factor to consider. Amp-hours are shown because battery capacity is specified in charge rather than energy. Sizing a battery needs amp-hours at the system voltage, not watt-hours, which is why both are given.
DC Power
P = V I; energy = P × hours
P = V I; energy = P × hours DC power is a straight product of voltage and current with no power factor to consider. Amp-hours are shown because battery capacity is specified in charge rather than energy.
Sizing a battery needs amp-hours at the system voltage, not watt-hours, which is why both are given.
This calculator takes 4 inputs: DC voltage, Current, Hours of operation per day, Energy price per kWh. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.