Plug-in solarPlug-in solar savings calculatorHow much would a balcony solar kit save in your state? Uses NREL sunshine data and your electricity price, or an exact PVWatts estimate for your ZIP code.
Electric ratesBill calculatorEstimate your monthly electric bill from your kWh and your state's average price, and see what each 100 kWh you cut is worth.
Power stationsRuntime calculatorHow long will a power station run your fridge, router, CPAP or sump pump? Pick what you'll plug in and get runtime and an output check.
GeneratorsSizing calculatorWhat size generator do you need? Tick what must run at once and get running watts, starting watts and the size to shop for.
EV chargingCharging cost calculatorWhat does it cost to charge an EV at home in your state? Monthly cost, cost per 100 miles, charging time per day, and a comparison with gas.
Smart thermostatsSetback calculatorHow much does turning the thermostat down at night and while you're out save? Uses the Department of Energy's rule of thumb.
Space heatersSpace heaters cost calculatorWhat does a space heater cost to run per hour, day, month and winter in your state? Compare with a heated blanket or mattress pad.
Water heatingWater heating cost calculatorCompare the yearly cost of an electric resistance tank, a gas tank and a heat pump water heater at your state's prices.
Energy monitorsStandby calculatorWhat does always-on power cost per year in your state? Enter your idle watts and how much you could switch off.
CoolingRoom size calculatorHow many BTU do you need to cool a room? Based on ENERGY STAR's room air conditioner sizing chart, adjusted for sun, people and kitchens.
LED lightingLED lighting savings calculatorHow much does switching to LED bulbs save per year in your state? Enter the number of bulbs, old and new watts, and daily hours.
Pool pumpsPool pumps savings calculatorHow much would a variable-speed pool pump save over your single-speed pump? Uses pump affinity laws and your state's electricity price.
LaundryDryer cost calculatorWhat does your electric dryer cost per year in your state, and how much would line drying part of your laundry save?