Are you prepared for when the next storm strikes? Don’t be left in the dark with clean, affordable energy that puts you in control. Keep reading to see how Sunrun Brightbox can power you towards a brighter future, whatever the weather.

Sunrun Brightbox Battery Storage

Sunrun Brightbox Home Solar + Energy Storage

Keep the Lights On with Brightbox

As a Massachusetts homeowner, you’re no stranger to unpredictable weather and power outages. Over 320,000 homes lost power after last October’s windstorm whipped through Massachusetts, the most since Superstorm Sandy. In fact, there were 106 reported blackouts in 2016 alone. That’s thousands of families without power every three or four days.

The imperfect solution? Emergency generators that eat up gallons of fuel by the day. But it doesn’t have to be this way. Massachusetts is working hard on moving away from harmful fossil fuels and toward solar energy for a cleaner, more resilient community.

We, too, are hard at work creating a brighter future for our kids using clean energy and less fossil fuels. That’s where Brightbox steps in. 

Our BrightboxTM solar battery service is currently only available for new Sunrun customers.

1. Power Through Blackouts with Safe Solar Battery Storage

Your Brightbox battery kicks in during a power outage, keeping your lights on while you stay safely inside and in control. The alternative? Unruly generators that have to be kept outside to avoid carbon monoxide poisoning.

With Sunrun Brigthbox there are no harmful effects, no extra noise, and no gas or diesel. Our lithium-ion battery is charged by your solar panels, and powers on during an outage for up to 10 hours. When the sun comes back out, your panels start recharging again. And if you get sun almost everyday? Your battery has unlimited power potential.

2. Lock In Low Rates With Financing Options

You don’t have to be at the whim of one of the highest electricity rates in the nation. Save with Sunrun today and lock in rates with an upfront investment, monthly payments, or purchase the system outright. You choose—our flexible financial options are designed to offer long-term savings.

3. The Clean Alternative to Diesel or Natural Gas

Our home solar battery service solution is the clean alternative to diesel or natural gas generators. And unlike power generators, Brightbox can save you money all year long. The research is in—power from the sun is the clean way to energize our planet. Lights out in the neighborhood? Not a problem in your Brilliant Home.



Throughout the day, your solar energy system powers your home and keeps your battery charged. Now, if there is an outage in the night, Brightbox can power the things you care about most for up to 10 hours* or until the sun comes up again.


Keep your food cold, your lights on, and enjoy greater peace-of-mind during a power outage with Sunrun Brightbox.

Keep your
food fresh
Watch TV
Power your lights
Open your
garage door
Use the

* Backup time estimates are based on a fully charged battery and typical use of standard appliances, lights, and outlets.


Get Started

Receive your free solar battery storage quote today. Our team members are here to help you every step of the way.

Frequently Asked Questions

Brightbox is a home solar battery service that offers clean, reliable and affordable power. Brightbox can be used for backup when the grid is down, or give you better control over your home energy use and cost.

Brightbox stores the electricity your rooftop solar produces during the day for when you need it most, such as in the evening, at night, or when the electric grid fails.

Yes. Brightbox is part of Sunrun’s holistic solar as a service offering. When you choose to go solar with Sunrun, you can add a Brightbox home battery if it is offered in your market.

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.

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.

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.

Our BrightSave Monthly and Prepaid solar plans come with 24/7 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 having to lift a finger.

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

However, if you’re still interested in Brightbox please let us know—you’ll be the first to know when we’ve come up with a solution. We’re hard at work on optimizing our technology to provide an even more seamless customer experience.

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 8-12 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!

The electrical circuits in your home that power your lights and appliances are all connected to breakers, safely regulating the amount of power that feeds each circuit. Multiple appliances can be powered by one breaker. For instance, one breaker could power your refrigerator plus nearby outlets or lighting in your kitchen. While you can’t necessarily target individual appliances, with Sunrun Brightbox you can choose which breakers you’d like to back up. What you can back up depends on the current wiring of your home.

You can use a portable generator—however, Sunrun doesn’t offer backup 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.

Please note that Brightbox cannot be installed on homes that already have a standby generator.

Having a home solar battery service in Massachusetts will help you power through blackouts and get a clean alternative to loud and potentially dangerous diesel generators.

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

Massachusetts has several incentives for going solar. One of them is the Residential Renewable Energy Income Tax Credit, covering 15%—or up to $1000—of your solar system’s installation cost. Another major incentive is the Federal Solar Tax Credit, covering 30% of the total system cost.

For more information on Massachusetts solar incentives, click here.

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 backup your home until utility power is restored.

In the event of a power outage, your Brightbox automatically discharges power to your critical home appliances.

To learn more about how home solar batteries work, click here.

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 8-12 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. To learn more about how home solar batteries work, click here.

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

Be ready for the next power outage — view outages by utility.

MEMA Outages

MEMA Outage Map

National Grid Outages

National Grid MA Outage Map

Eversource Outages

Eversource Outage Map

Brightbox Solar Battery Storage Articles

Make your home a Brilliant Home with Sunrun Brightbox™

Find out if solar is right for you!

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