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Take Control of Your Energy With a Solar Battery Backup From Sunrun

Back up your whole home, or just the essentials, and lower electricity costs with Sunrun’s solar and battery service.
Tesla Powerwall

Clean Back-up Power and Rate Protection in California

Now, more than ever, is the time to take control of your solar panel power system. With Brightbox™, Sunrun’s solar and battery backup service, Californians can reclaim control over their energy amid rolling blackouts due to increasingly extreme weather and unpredictable electric rates. 

Enjoy customized home solar battery backup and Time-of-Use (TOU) rate protection in California. For as little as $0 down, take advantage of Sunrun’s industry-leading rooftop solar and home battery technology, superior service and flexible financing options so you can enjoy maximum peace of mind. Brightbox solar battery backup service is only available for new Sunrun consumers.

How Brightbox Powers You Forward

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Back up What You Want

Manufactured by industry leaders known for their legacies of quality and innovation, our lithium-ion solar-powered batteries are best-in-class. Choose reliable backup solar power storage for your whole home with Tesla Powerwall, or just the essentials (such as your refrigerator and wireless routers) with LG Chem.

sunrun logo with text The Sunrun Guarantee

24/7 Monitoring and Maintenance

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

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Protection From Time of Use Rates

During specific times when people use the most energy, like when everyone is cooking dinner or watching TV in the evenings, some electric companies charge more for electricity. This can be frustrating, but Sunrun has the solution! Brightbox solar batteries allow you to use your own home solar power system during these expensive times of peak usage and reduce the amount of electricity you buy from the electric company. This means that you can reduce your bills and not worry about the cost of using power when you need it most.

power through life

Extreme Weather Continues to Rise

As long as global temperatures continue to rise,1 droughts, wildfires and dangerous air pollution from fossil fuels will get worse. From January through July 2020 alone, 5,292 wildfires were reported covering a total of 78,823 acres.2 In the face of an aging power grid that requires billions of dollars in repairs,3 blackouts have become the new normal for Californians across the state.4 But as the leading solar state in the country,5 California’s unrivaled solar potential could be the key to a brighter and healthier today for all. Sunrun Brightbox is here to help you benefit from your slice of California sun.

Power Through Rising Energy Costs With a Solar Battery

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  • Keep the power on during outages
  • Best-in-class solar panels and batteries
  • 24/7 Monitoring and Free Maintenance
  • Learn about the 26% federal tax credit

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Frequently Asked Questions

California has several incentives for going solar, including the Self-Generation Incentive Program (SGIP). Depending on the size of the battery and when it’s purchased, solar battery owners can earn a rebate for as much as $250 for every kilowatt-hour (kWh) their battery stores. The rate will decrease as more Californians purchase solar batteries. 

Another major incentive for people who purchase a solar system is the federal solar investment tax credit, which covers 26% of the owner’s final cost of the solar system. Starting in 2023, the tax credit will step down to 22%, and after 2024, 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 California Solar Incentives.

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

Aside from very rare exceptions, Sunrun’s Brightbox service includes rooftop 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.

Brightbox works in tandem with the grid, and is not designed as an off-grid solution.

For most households, one solar battery is sufficient to power your most important appliances. In the event of a blackout, your Brightbox battery provides approximately 8-12 hours of backup power.

When the sun rises, your solar panels charge your battery so you can continue to back up your home until utility power is restored.

The amount of available backup power depends on what you choose to back up, what time of day and season the power outage happens, and how much energy your household uses. If the battery is fully charged, it can provide approximately 8 to 12 hours of backup. If your battery has been discharging throughout the day, it automatically holds a 20% reserve for a backup emergency, or about 3-4 hours for a blackout when the sun is down. When the sun comes back up, your Brightbox will start to charge again.

Brightbox installation is a relatively simple process. The battery itself is about the size of a water heater and easily mounted on a wall—usually inside your garage or outside of your home. The clearance required for a Brightbox battery and its accompanying components is 6.5’ H x 10’ W.

You can use a portable back-up generator, however, Sunrun doesn’t offer back-up generators. If you’re interested in installing a portable generator, you can contact a local electrician or renewable energy installation company. These experts can recommend a system that will be appropriate for your home.

Having a home solar battery service in California can save money by offsetting high Time-of-Use (TOU) rates and provides clean, reliable backup power during a blackout.

Your system is also covered by our Sunrun Guarantee, so we handle maintenance and repairs at no additional charge.

You can monitor your Brightbox battery’s performance on your mySunrun app. Sunrun also manages the battery remotely using proprietary software so we keep tabs on your system 24/7 to make sure it’s running as it should, and automatically updates your battery’s settings to save you as much money as possible.

Think of it as energy surge pricing. Time-of-Use rates, or TOU rates, are electricity rates in which utilities charge for both how much and when you use energy. Under these rates, energy tends to cost more during peak demand times, such as late afternoon and evening when demand is highest.

Brightbox helps manage TOU rates by optimizing your battery’s charge and discharge behavior to maximize savings. To learn more about TOU rates, click here.

Our expert electricians will take care of installing and configuring your battery for you. Batteries last anywhere between 10 and 15 years, and manufacturers typically offer a 10-year warranty.

Still, Brightbox is more than home batteries; it’s a holistic service that includes professional maintenance and monitoring during the life of your agreement. Customers who own their battery get Sunrun service for 10 years, while customers with a BrightSave Monthly or Prepaid contract get free battery maintenance replacement for the lifetime of their contract - generally 20 or 25 years.

In the event of a power outage, appliances like your refrigerator, electronics chargers for cell phones, laptops, and your TV can be backed up by Brightbox for approximately 8 to 12 hours. When the sun rises again, your solar panels will recharge your Brightbox. The most important rooms and appliances in your home will be powered by your home battery until the grid is up and running again. Learn more about how home solar batteries work.

Brightbox allows you to store the excess energy your solar energy system produces during the day and 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.

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.

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

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 shining or during the event of an outage. This is the most reliable and economical way to use your Brightbox system, and the one most strongly recommended by Sunrun’s service experts.

Our monthly and full-amount solar leasing options come with proactive monitoring and maintenance — on us. So if we notice that your Brightbox or solar panels aren’t working at their full capacity, we’ll send an expert over to fix it without you lifting a finger.

Brightbox offers two solar energy battery options: Tesla Powerwall and LG Chem. Both are industry-leading lithium-ion batteries. Compared to lead acid batteries, solar batteries that use lithium-ion technology are more efficient and have longer life cycles, making them one of the best home battery options when going solar.

Tesla Powerwall provides the potential for whole home backup while LG Chem backs up four circuits of your choice. There are also differences in the software and app functionality. 

Request a free quote to get connected with a Sunrun Solar Advisor and determine which back-up solution will best meet your energy needs.

Just like solar-only systems, the size of your rechargeable solar battery system is determined by your unique energy needs and habits. Factors, such as the amount of electricity you use at home and the devices and appliances you want to back up, will play a key role when selecting the right home battery solution for you.

The installation of Brightbox is a relatively simple process. It’s about the size of a water heater, and the home battery system is mounted on a wall — usually inside your garage or outside of your home.

Most residential batteries are installed and configured with baseline settings by your solar installer. Solar batteries last anywhere between 10 and 15 years, and manufacturers typically offer a ten-year warranty. But Brightbox is more than a home battery: It’s a holistic service that includes professional maintenance and monitoring for 25 years with select plans.

You can monitor your battery’s performance on your mySunrun app. Sunrun also manages the battery remotely using proprietary software to make sure it’s running as it should, and it automatically updates your battery’s settings to save you as much money as possible.

Control Your Energy during TOU (Time-of-Use) Electricity Surge Prices

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  • Solar
  • Solar +
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Planned power outages


Pacific Gas & Electric (PG&E) Outage Map


Southern California Edison (SCE) Outage Map


San Diego Gas & Electric Outage Map

Brightbox Solar Battery Storage Articles