Inverter Size Calculator
Calculate the correct inverter size for your RV, home backup system, solar setup, camping equipment, and off-grid power needs.
Your Results
Enter your appliance load information and click the button to calculate the recommended inverter size.
What Is An Inverter Size Calculator?
An Inverter Size Calculator helps determine the correct inverter wattage required to safely operate your electrical appliances. Choosing the proper inverter size improves efficiency, prevents overload situations, and helps maximize battery performance in solar and off-grid systems.
How To Calculate Inverter Size
Add together the running wattage of all devices you plan to operate simultaneously. Then account for startup surge power and include a safety margin to ensure reliable performance during peak demand.
| Appliance | Typical Wattage |
|---|---|
| LED Light | 10W – 20W |
| Laptop | 60W – 100W |
| Television | 80W – 150W |
| Refrigerator | 150W – 400W |
| Microwave | 800W – 1500W |
Recommended Inverter Sizes
A 1000W inverter is generally suitable for lights, laptops, televisions, and small electronics. A 2000W to 3000W pure sine wave inverter is recommended for refrigerators, microwaves, coffee makers, and larger RV power systems.
Why Choosing The Right Inverter Matters
Selecting an inverter that is too small may cause shutdowns, overheating, or equipment damage. Oversizing an inverter can increase costs unnecessarily. A properly sized inverter ensures safe operation, longer battery life, and reliable off-grid power.