home with solar panels on roof

Back up Your Whole Home With Sunrun Brightbox™ Solar Battery Storage in Illinois

We know how to prepare for the unpredictable. Power through unexpected outages in Illinois with clean, renewable back-up electricity from Sunrun’s Brightbox.

Tesla Powerwall

Affordable, Complete Backup

Historic derechos. Record heat waves. Damaging winter storms. While Illinois’ extreme weather events contribute to these increasingly uncertain times, we’re here to put the power back in your hands. Go solar with Sunrun and enjoy renewable, clean energy storage that puts you in control. 



Through Sunrun’s affordable Brightbox rechargeable solar energy system, you can now get complete home backup with Tesla Powerwall for as little as $0 down. As America’s leading residential solar company, Sunrun is committed to providing industry-leading solar products, superior service and flexible financing options so you can enjoy maximum peace of mind.

Brightbox solar battery service is only available for new Sunrun consumers.

How Brightbox Powers You Forward


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Uninterrupted Power for the Entire Home

Now you have the option to power your entire home through a blackout.* In the event of a power outage, Tesla Powerwall can provide complete, continuous power and recharges daily when the sun rises.

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Control and Energy Independence

We make the power of solar accessible. Our flexible financing options offer low, predictable rates and a customized agreement to meet your family’s energy needs.

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24/7 Monitoring and Maintenance

We do the work so you don’t have to. Our financing options come with 24/7 monitoring. If your solar panels or Tesla Powerwall aren’t working at their full capacity, we’ll send an expert over to fix it.

power through life

Power Through the Unpredictable

Increasingly extreme weather events like Illinois’ unprecedented derecho have left thousands without vital power for days.1 While standby generators can offer temporary relief, they can seriously endanger you and your family without the proper precautions.2 In a country where power outages are more frequent than any other developed nation, reliable energy solutions like solar energy storage are more important than ever.3

That’s where Sunrun steps in. When you choose Sunrun, you’ll not only enjoy resilient, renewable energy, but you’ll also be paving the way towards clean energy for all.

Do you own your home?

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Frequently Asked Questions

Brightbox is a holistic solar battery service that offers you clean, safer, reliable back-up power to have better control over your home energy use and cost.

Brightbox allows you to store the solar power that your solar energy system produces during the day so that you can use it when you need it most — such as in the evening, at night or when the electric grid fails due to an extreme weather event or physical damage to the equipment.

Aside from very rare exceptions, Sunrun’s Brightbox service includes residential solar panels. Brightbox stores 100% clean, renewable, home-grown solar so you don’t have to pay your electric company for extra power to charge your battery system.

Just like a solar panel, the number of Tesla Powerwalls you need will be determined by your unique energy needs and habits — for some consumers, one Tesla Powerwall may be sufficient. Your Solar Advisor will help you evaluate your energy usage to customize a solar home battery system that sufficiently backs up your entire home. Request a free quote today.

Sunrun Brightbox offers uninterrupted back-up power for your entire home. 

The amount of available back-up power depends on how much energy your household uses. If your Tesla Powerwall battery is fully charged, it can provide approximately one full day of backup for your entire home. When the sun comes out, your battery will start to charge again.

A Tesla Powerwall installation is a relatively simple process. One Tesla Powerwall itself is about the size of a water heater and easily mounted on a wall by our professional installers — usually inside your garage or outside of your home.

Through Sunrun’s Brightbox service, your Tesla Powerwall will automatically disconnect from the power grid in the event of a grid outage and restore power to your home in a matter of seconds. Your rooftop solar panels will continue to recharge your Tesla Powerwall until the grid is up and running again.

Our certified electricians will install and configure your Tesla Powerwall for you. Batteries last anywhere between 10 and 15 years, and manufacturers typically offer a ten-year warranty.

Still, Brightbox is more than just a home battery: It’s a holistic service that includes professional maintenance and monitoring during the life of your agreement. Consumers who own their Tesla Powerwall get Sunrun service for ten years, while consumers with a monthly plan or a full-amount plan get free Tesla Powerwall maintenance and replacement for the lifetime of their contract.

You can monitor your Tesla Powerwall’s performance on your mySunrun app. Sunrun also manages the home battery system remotely through the use of proprietary software to make sure it’s running as it should and automatically updates your battery’s settings to save you as much money as possible.

Our monthly and full amount solar plan options come with proactive monitoring and maintenance — on us. So if we notice that your Tesla Powerwall or solar panels aren’t working at their full capacity, we’ll send an expert over to fix it so you don’t have to lift a finger.

Illinois has solar incentives and rebates for people who purchase their own solar system, including a solar rebate from ComEd, a property tax exemption and the Solar Renewable Energy Credit (SREC) through the state’s Adjustable Block Program.

Another major incentive for people who buy home solar batteries is the federal solar investment tax credit, which covers 26% of the final cost for the owner of the solar system. Starting in 2021, the solar tax credit will step down to 22%, and after 2021, the tax credit for home solar ends. 

We recommend contacting a tax professional to most accurately determine the impact of the federal solar tax credit and local tax credits on your taxes. 

Learn more about Illinois Solar Incentives.

You can use a portable generator — however, Sunrun doesn’t offer back-up generators. If you want to install a back-up generator, you can contact a local electrician or solar energy installation company. These experts can recommend a system that will be appropriate for your home.

Please note that Tesla Powerwall cannot be installed in homes that already have a standby generator.

Our rechargeable solar battery systems are designed to keep you on-grid during normal service times while still providing reliable backup when the sun isn’t out or during the event of an outage. This is the most reliable and economical way to use your Brightbox system, and it’s the one most strongly recommended by Sunrun’s service experts.

At this time, Brightbox is only available to new Sunrun consumers. We can’t install rooftop solar panels or Tesla Powerwall if you already have an existing solar installation or if it isn’t offered in your area.