Calculators

See how well your roof is suited for solar power.

Find out how and when an investment in solar will pay off.

Determine what kind of monthly power a typical solar array can expect in your area.

List your electrical devices to calcuate required inverter size.

Size your MPPT or PWM charge controller based on panel specs, wiring, and temperature.

Find solar panels for a solar generator, inverter, or charger.

Find the best angle for your solar panels at your location.

Calculate voltage and current for different series / parallel wiring.

Calculate proper wire gauge for safe, efficient electrical installations.

Calculate your fridge's annual energy cost and compare to ENERGY STAR averages.

Calculate your annual EV charging costs at home and on the road. Compare to gas and see your potential savings.

Compare the total cost of ownership between electric and gas vehicles. See savings over 5-10 years including fuel, maintenance, and incentives.

Calculate how many solar panels you need to charge your electric vehicle. Size your solar system for your EV and driving habits.

Calculate your household's carbon footprint from electricity, transportation, and appliances.