Load Calculator

Knowing your daily electricity consumption in kilowatt-hours (kWh) is crucial for properly sizing a solar power system, and our kWh Calculator makes it easy.

Fill in your appliances & loads here or use our default values in the 'Help!' section below.
Appliance/Load Name
On at Same Time*
AC Watts
AC Surge*
DC Watts*
Hours On per Day
Watt-Hours / Day
Total Watt-Hours/Day: 0    

*Values only needed if you want a system which operates with batteries (e.g. an off-grid solar system)

Help! I'm not sure of the wattage of my appliances.

Select the appliances from this drop down menu. To the right will appear typical wattage values for the appliance you selected. However, for the most accurate information look on your appliance to find its wattage rating (or it amperage rating and then multiply that by its voltage to approximate its wattage).

Add to Calculator

Also, see our Kill-a-watt database with real world power consumption data on a
variety of appliances collected by our own staff and customers like you.

Other Useful Information

If You're Sizing an Off-Grid System...
Your off-grid inverter needs to be rated for at least 0 Watts and support a power surge of at least 0 Watts.
Your average DC only energy consumption is 0 watt-hours.

If You're Sizing a Grid-Tie System...
Your average daily watt-hours usage is 0 watt-hours.

Want to save your data?

Your Name

Now that you know the load you want to handle, why not give our Specialists a call at 877-878-4060? Let us help you design a system optimized for your needs.

Solar Calculators

Or, you can use one of our additional calculators to get more sizing information

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