Quick answer
The practical explanation
Battery size depends on which loads must run, their starting and continuous power, expected outage duration, available solar charging, and budget. A whole-home label does not guarantee every appliance can operate simultaneously or indefinitely.
What to know
Three points to keep in mind
- List essential loads before selecting capacity.
- Separate energy capacity from maximum power output.
- Discuss heating, cooling, pumps, and motor-starting loads specifically.
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.