How to Determine What Size of Permanent Generator Is Needed for a Home

A permanent standby generator provides a backup source of energy that is constantly connected. The size of the generator is one of the biggest decisions you'll need to make when buying the unit. A generator that is too small puts strain on the unit itself and on the motors of the appliances run by the generator. Knowing exactly what you want to run when the power is out helps you figure out which size of permanent generator is necessary.

Instructions

- 1
  Identify the essential items that you want to run even when the power is out. This typically includes appliances such as your stove and refrigerator, sump pump, heating system and lights. A permanent generator typically allows you to determine whether you want to back up all or just a few circuits.
- 2
  Add up the wattage of each of those items to get the total amount you need to run on the generator. The wattage general describes the amount needed to run the equipment once it is already started.
- 3
  Double the wattage total to account for the extra power required to start up appliances with motors. While most generators account for surges, buying a slightly larger generator gives you extra room as a buffer.
- 4
  Choose the permanent generator size that best fits the items you will have on the unit. Permanent generators generally range between 10,000 and 15,000 watts. The sizes are sometimes listed in kilowatts, which are equal to 1,000 watts. So, a 17-kilowatt generator can handle up to 17,000 watts.

How to Fix a Broken-Down Couch Cushion

How to Reglaze Epoxy Bathroom Tiles

Home Maintenance