Direct answer
A home battery is worth it when you need outage backup, face high time-of-use rates, or get weak export credits. Size usable kWh to the loads you must keep on — not marketing names.
This hub groups every battery and whole-home independence guide on our site so readers can build topical depth: sizing → product shortlist → backup goals.
Core battery guides
- Best home solar batteries 2026
- Tesla Powerwall 2 review
- Can a house run 100% on solar?
- Battery backup calculator
Sizing checklist
- List critical loads (fridge, internet, medical devices, lights).
- Estimate watts × hours needed during an outage.
- Convert to kWh and add a 20–40% buffer.
- Confirm continuous power rating (starting large appliances is harder).
- Compare installed package price — not only battery MSRP.
Related hubs
Costs Hub · Buy Solar Hub · Start Here
Frequently asked questions
Do I need a battery for solar to work?
No for simple bill reduction on a stable grid. Yes for nighttime backup or weak export credit economics.
Can one battery run central AC?
Sometimes briefly — whole-home HVAC often needs a larger stack or load management.