Choosing the right inverter and battery size is one of the most important steps when setting up a reliable backup power system. Whether you want to power your home, shop, or office, understanding how to size your inverter and batteries correctly will help you avoid frequent power failures, overloads, and battery damage.
. Understand Your Power Needs
The first step is to calculate the total power (in watts) of the appliances you want to run during a power outage. Check the power rating of each appliance, usually written on the back or near the plug.
For example:
Television – 100W
Fan – 75W
Laptop – 60W
Light bulbs (4) – 40W each = 160W
Router – 20W
Total load: 415W
To be safe, add about 20% to cover future additions or minor power surges.