Off-Grid & Solar Power System Sizing Calculator
Estimate the inverter size, battery capacity, and solar panel wattage
needed for your backup, RV, off-grid, or portable power setup.
Primary Use Case
Selecting a use case replaces the appliance list with a recommended starter set. You can edit, remove, or add any item.
Appliances / Devices
Choose the appliances and devices you expect to power. Review the
estimated wattage for each item, then adjust the hours used per day and
quantity as needed. Select Add Another Item to include
additional loads, or select Remove to delete an item you
will not use.
Important:
This calculator provides an estimate only. Actual appliance wattage,
operating time, duty cycle, starting surge, weather, panel orientation,
wiring losses, and system efficiency can affect the final system size.
Verify appliance labels and manufacturer specifications before purchasing.
For critical backup power, contact us for a detailed sizing review.