There are two different ways to determine which circuits are backed up by the battery system if you are unsure what is backed up and what isn't.
- Locate your backup load center (electrical panel) and see which breakers are inside.
- Simulate a grid failure by turning off your main breaker (sometimes call the service disconnect). This most likely be in your main electrical panel where you utility meter is located. Anything that is still powered is backed up by the battery system. Anything that is not powered is not backed up by the battery system.
If you have a single battery, you probably have a partial home backup (i.e. only the most important circuits are backed up). If you have two batteries, you may have a partial-home backup or a whole-home backup. If you have three or more batteries, you probably have a whole-home backup. However, this is just a general guideline as everyone's home is different. Some homes have many more circuits (and larger circuits) than other homes. You may have 3 batteries and a partial-home backup. You may have a single battery and a whole-home backup. Therefore it is always best to either locate your backup load center or test the system. You can read more about partial-home and whole-home backups here.