What a battery does for you
Backup when the power goes out
Your battery switches on automatically and keeps the things that matter running: refrigerator, freezer, internet, lights and more.
Use more of your own solar
Store the solar you make during the day and use it at night. Utilities usually credit the power you send back at a lower rate than they charge you, so using it yourself stretches your system further.
Safe, automatic switchover
During an outage the system disconnects your home from the grid, which protects utility crews and lets your solar keep producing while the sun is up.
A battery isn't right for every home
When it makes sense, it's a valuable addition. When it doesn't, we'll say so. Here's when it usually earns its place:
- You want power to stay on during outages
- You want to use more of your own solar in the evening
- Your utility plan has time-of-use rates
- You work from home or rely on equipment that can't lose power
Battery backup has limits. Runtime depends on the battery's size and what you're powering, and we'll explain exactly what to expect for your setup.
Batteries we install
Tesla Powerwall
Tesla's home battery, monitored and controlled from the Tesla app.
Enphase IQ Battery
A modular battery that pairs naturally with Enphase microinverter systems.
EG4
Lithium iron phosphate batteries paired with EG4 hybrid inverters, a strong value for larger backup systems.
We'll recommend the right fit based on your home, your existing equipment and what you want to keep running.
Whole-home backup, in his words
He wanted everything except the pool to keep running in an outage. Our lead installer worked through the design with him, load by load, and the inverters and batteries mount on the garage wall.
“Literally, you don't give up any space, which is really nice if you think about a generator.”
Essentials or whole home?
Essential loads backup
Keeps your critical circuits on, like the fridge, internet, lights and a few outlets. Smaller system, smaller investment.
Whole-home backup
Keeps most or all of your home running, including bigger loads. Takes more battery capacity and sometimes a panel upgrade.
Add a battery to the system you already have
Most grid-tied solar systems shut off during an outage. Adding a battery with the right equipment changes that. Compatibility depends on your inverter and electrical setup, so we start by looking at what's on your home, even if we didn't install it.
- We evaluate your existing inverter and panel
- We tell you what's compatible and what isn't
- We handle permits, install and app setup
From first call to backup power
Tell us what you want to keep running
Essentials only, or the whole house? We'll talk through your outage priorities.
We size it to your home
We look at your usage, your electrical panel and any existing solar, then recommend a system.
Installed and ready
Permitted, installed to code by our electricians, and set up in your monitoring app.
Prefer a generator? We install standby generators too. See standby generators
Clean, organized and backup-ready
“Appreciated working with this company's professional crew that went above and beyond to work out a solar system of my choice! The solar system turned out so clean and organized with all the safety features and backup components that other companies never offered! Couldn't thank them enough for a 5 star plus plus job done!”
Battery backup questions
How long will a battery run my house?
It depends on the battery's capacity and what you're powering. Running essentials stretches a battery much further than running the whole house. We size the system around the loads you care about most.
Do I need solar to get a battery?
No. A battery can be installed on its own and charged from the grid. It's most useful paired with solar, which can recharge it during an outage.
Will my solar keep working during an outage without a battery?
Usually not. Most grid-tied systems shut down when the grid goes down, for safety. A battery with the right equipment lets your system keep running.
Can you add a battery to solar another company installed?
Often, yes. We'll evaluate your inverter and electrical setup and tell you what's compatible.
Is there a tax credit for home batteries?
The federal residential credit that covered home batteries ended for systems installed after December 31, 2025. We'll give you straight numbers without counting on it.
Related services
Talk to us about your project
Get a battery backup quote
Tell us what you want to keep running and we'll take it from there.
- Call
- 435 767 1082
- info@zionsolar.org
- Hours
- Mon to Fri: 9:00 AM to 5:00 PMSat and Sun: Closed
- Based in
- St. George, Utah. Locally owned and operated. Serving Southern Utah and Southern Nevada.