Physics

Estimate one EV charging session cost from charger kWh or battery charge details and your electricity rate.

Estimate EV charging time from battery size, charge percent, charger power, efficiency, and optional vehicle power limit.

Estimate solar payback years, first-year bill savings, net project cost, and simple 25-year net savings from your quote.

Estimate a fixed solar panel tilt from latitude, view seasonal angles, and compare your optional roof pitch.

Find a simple solar panel tilt from latitude and season, then compare it with your roof pitch or current panel angle.

Estimate solar battery bank capacity in kWh and Ah from bill data, daily energy use, appliances, backup days, and battery limits.

Convert voltage and Ah or mAh to Wh and kWh, find needed capacity, estimate runtime, and check lithium-ion flight limits.

Find battery C-rate, current, run time, capacity, and a buffered label current check from common battery specs.

Estimate battery backup time or battery size from load watts, voltage, efficiency, usable battery percent, and battery count.

Convert Ah, mAh, Wh, kWh, and volts, then estimate usable battery energy and runtime from load watts.