Cox Solar Solutions · Illinois & St. Louis
Battery Storage & Backup Power
Duracell, Enphase, SolarEdge, and Tesla batteries, with new solar or added to the system already on your roof.
Equipment we install
- Tier-1 Solar Panels
- Enphase Microinverters
- Tesla, Enphase, SolarEdge & Duracell Batteries
- Smart Electrical Panels
Battery Storage
Why Illinois Homeowners Are Adding Batteries
Under Illinois' supply-only net metering, energy you use yourself is typically worth more than energy you send back to the grid. A battery stores your midday solar so you can use it in the evening — and keeps critical circuits running when storms knock out power.
Illinois utilities also offer a storage rebate of $300 per kWh of battery capacity for qualifying systems, which can significantly reduce the cost of adding storage.
Why Cox Solar
Benefits of Battery Storage
Outage Protection
Automatic backup for your fridge, sump pump, furnace blower, and lights.
Illinois Storage Rebate
$300 per kWh of capacity through the ComEd and Ameren Illinois DG rebate program.
Four Trusted Brands
We install Duracell, Enphase, SolarEdge, and Tesla batteries.
Add to Existing Solar
Standalone battery installs for homes that already have solar, even if someone else installed it.
Batteries We Install
We install four home battery brands. We recommend one based on the inverter you have or plan to use, what you want backed up, and where the battery will go.
- Tesla Powerwall
- Enphase IQ Battery
- SolarEdge Home Battery
- Duracell Power Center
Standalone Battery Installs for Existing Solar
Already have solar? We add batteries to existing systems, including systems installed by another company. We look at your inverter, electrical panel, and utility agreement, then recommend the battery that pairs cleanly with what is already on your roof.
A standalone battery install doesn't require new panels. We handle the design, permit, utility paperwork, installation, and app setup.
- Works with most existing solar systems, including other installers' systems
- No new panels required
- Essential-loads or whole-home backup designs
- Indoor or outdoor (garage, basement, exterior wall) placement
Illinois Incentives
Illinois Programs That Lower Your Cost
- $300per kW
ComEd & Ameren solar rebate (smart inverter)
- $300per kWh
Utility battery storage rebate
- 15years
Illinois Shines REC contract
- 50%upfront
Of small-system REC value paid at energization
FAQ
Battery Storage Questions
How long will a battery power my home during an outage?
It depends on battery capacity and what you run. A typical home battery can keep essentials — refrigerator, sump pump, lights, internet, furnace blower — running overnight, and recharges from your solar the next day.
Can I add a battery to my existing solar system?
Yes. We do standalone battery installs on existing solar systems, including systems another company installed. We review your inverter and electrical panel, then recommend the Duracell, Enphase, SolarEdge, or Tesla battery that pairs best with your setup.
Which battery brands do you install?
We install Tesla Powerwall, Enphase IQ Battery, SolarEdge Home Battery, and Duracell Power Center. The right choice depends on your existing or planned inverter, your backup goals, and your space.
Does a battery qualify for an Illinois rebate?
ComEd and Ameren offer a storage rebate of $300 per kWh of capacity for qualifying systems through December 31, 2029. Program requirements apply, and we handle the application.
More Services
Explore Other Solutions
Solar Panels
Custom-designed rooftop and ground-mount solar systems built to lower your electric bill and hold up to Midwest winters.
Learn more →
Solar Roofing
Replace an aging roof and go solar in one coordinated project — one crew, one schedule, one warranty.
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Solar Pergolas
Shade structures, pergolas, and carports topped with solar — ideal when your roof is shaded or limited.
Learn more →
Free solar quote
Get Your Free Customized Solar Plan
See your system design, Illinois incentives, and estimated savings — no pressure, no obligation.