Home batteries store electricity — from solar or the grid — to use during outages or expensive rate periods. Whether one's worth it depends on why you want it.
What a battery is good for
- Backup power during outages (keeps essentials running)
- Bill savings by storing cheap/solar power and using it during peak rates
- Solar self-use so extra daytime solar isn't wasted
When it pays off
Batteries make the most financial sense with time-of-use rates (big peak/off-peak gap), poor net-metering (so you'd rather store solar than export it cheaply), or frequent outages where backup has real value to you.
Sizing basics
Decide what you want to run and for how long. Backing up a few essentials during an outage needs far less capacity than running a whole home. Right-sizing avoids overpaying for capacity you won't use.
With or without solar
Batteries pair naturally with solar to store daytime production, but can also charge from cheap off-peak grid power on time-of-use plans.
The honest take
If you mainly want outage protection or you have a big peak/off-peak spread, a battery can be worth it. On flat rates with rare outages, the payback is weak — buy it for resilience, not just savings.
FAQ
Is a home battery worth it without solar?
It can be on time-of-use plans — charge from cheap off-peak power, use it during peak — or for outage backup. On flat rates with rare outages, the savings case is weak.
How big a battery do I need?
It depends on what you want to run and for how long. Backing up a few essentials needs far less capacity than powering a whole home.