Sam Gorman

Find EV electricity cost per mile, 100 miles, month, year, public charging mix, gas savings, and break-even gas price.

Find the breaker size for an EV charger, or start with an existing breaker to find the safe charger amp setting.

Estimate EV charger wire size, breaker size, ground size, and voltage drop for a Level 2 home charger.

Size an EV charger circuit: breaker, safe charger amps, wire size, charging power, and long-run voltage drop.

Calculate a loaded resistor divider’s DC output voltage, loading loss, current, and resistor power.

Calculate series, parallel, or series-parallel speaker impedance and compare the nominal load with your amplifier minimum.

Estimate RV battery bank Ah, Wh, usable energy, and battery count for days off-grid, with reserve, battery type, and inverter loss.

Estimate RV solar array watts, panel count, and battery-bank amp-hours from daily energy use, sun hours, and backup days.

Estimate subpanel feeder breaker size, panel rating, spare room, and optional main service headroom from planned loads.

Estimate residential panel load, spare amps, and the largest added running load that may fit using a NEC-style dwelling method.