Off-grid Energy Calculator

Sizing your Generator

Do you want to live off the grid but dont know where to start? Well you've come to the right place. Below, you can find 3 useful calculators that will give you a practical and quick summary your energy needs.

Properly sizing your generator, inverter, and battery bank can save you tons of money in the long run. Please look over these calculators carefully. The more information you put down, the better your results.

120/240V Starting Watts: Running Watts:
Properly sizing a generator can be difficult. We understand that not everyone's energy needs are the same. Just because your neighboor has a 20 kW diesel generator does not mean you need a 20 kW as well.
For example, if you have a shop with several 240V tools, you will definitely need a bigger generator. Also note that these high wattage appliances usually have a higher amp starting rate than their running amps. This means that even though your AC unit might use 5000 watts continuously, it might need 12,000 to start so a 10 kW generator will not be enough and it wont be able to start your AC unit. With this in mind, we have listed the 240 loads first. You can switch between 120V and 240V to see the actual running wattage for individual items.
Air Conditioner
Water Heater
Electric Washer
Clothes Dryer
Well Pump
Booster Pump
Inverter Qty * If your inverter is not listed, please include it below
Inverter model: Qty Voltage AC Input Current Max
Please add additional items below (Don't forget to write the name and input the wattage.)
Use our watt calculator for easy conversion ~>Volts x Amps = Watts
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Kitchen Appliances:
Refrigerator Combo
Standalone Freezer
Stove
Oven
Toaster Oven
Microwave
Include Standard Coffee maker
Include Blender
Include Juice Maker
Please add additional appliances below (Name and Wattage required.)
Use our watt calculator for easy conversion ~>Volts x Amps = Watts
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Lighting:
# of Bulbs Type
# of Bulbs Type
# of Bulbs Type
# of Bulbs Type
# of Bulbs Type
If you have additional types of bulbs, list them below.
Use our watt calculator for easy conversion ~>Volts x Amps = Watts
# of Bulbs Type Wattage
# of Bulbs Type Wattage
# of Bulbs Type Wattage
# of Bulbs Type Wattage
# of Bulbs Type Wattage
Household Items:
Include Clock Radio
Include Computer(s) and / or Laptop(s)
Include Home theater Audio
Include Satellite Dish
Include Ceiling Fan
Portable Fan
LCD TV
Vacuum Cleaner
Please add additional items that might be in use while generator is running.
Use our watt calculator for easy conversion ~>Volts x Amps = Watts
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Quantity Name: Wattage
Generator Sizing Results:
Thank you for taking the time to complete our Generator Sizing Calculator.

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