Quick answer
The practical explanation
A battery stores electricity for later use. A compatible inverter and control system decide when to charge, discharge, connect to the grid, or isolate selected loads during an outage.
What to know
Three points to keep in mind
- Battery capacity is measured in energy, while power rating limits simultaneous load.
- Backup behavior depends on system configuration and selected circuits.
- Reserve settings can balance everyday savings with outage preparedness.
For your home
A site-specific answer still matters
Solar results and service needs depend on the roof, equipment, shade, household electricity use, utility requirements, and the condition of the existing system. Use this guide as a starting point, then have the property and equipment evaluated before making a major decision.
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Authoritative references
This article summarizes general consumer information and is not tax, legal, insurance, engineering, or utility-rate advice.