The Sunrun Brightbox is a wall-mounted solar battery using LG Chem’s Lithium ion technology, that can be connected with existing solar energy production infrastructure. It is designed to be integrated into a wider network of energy storage devices and function as a micro grid during blackouts.
SDG 7: Affordable and Clean Energy
SDG 13: Climate Action
Market Suggested Retail Price
Target Users (Target Impact Group)
Distributors / Implementing Organizations
This product is distributed by Sunrun, through an online quote
Direct competitors include Tesla's Powerwall.
The Sunrun Brightbox uses a LG Chem RESU battery and is mass produced in South Korea utilizing LG Chem's battery technology.
Intellectural Property Type
User Provision Model
Users can obtain this product through direct sales from the manufacturer.
Distributions to Date Status
As of the end of 2018, Sunrun had installed over 5,000 Brightbox units with numbers expecting to double by the end of 2019.
Description of power outputs
1 AC outlet discharging 14.3 A @ 350 VDC
Description of light points
Battery only, no light points
Total lighting service (lumen-hours per solar-day)
Peak power rating (Wp)
Battery capacity (kWh; mAh)
Nominal battery voltage (V)
User replaceable battery (yes/no)
Remote system diagnostics (yes/no)
Purchased outright or leased
Mobile service required (yes/no)
The Sunrun Brightbox is a solar energy storage system, designed to be integrated into a larger network of storage devices to provide power to homes in periods of blackouts. The system utilizes LG Chem's Lithium ion battery technology and is available with a 5 kW capacity; with a total energy rating of 9.8 kWh. The unit is wall mounted and can operate in most environments and temperatures with an IP55 rating. The unit has the following dimensions: 744 x 907 x 206 mm, and weighs 97 kg. The data sheet can be found here
Provided by the manufacturer
Replaceable components include the battery, inverter, solar panels, mounts and wiring connections
The battery is rated to last 6,000 cycles, and comes with a 10 year warranty. Users that purchase the Brightsave service package receive free full servicing.
Manufacturer Specified Performance Parameters
The battery is designed to provide 8 - 12 hours of power for household overnight or in a blackout or power outage.
Vetted Performance Status
Testing performed by the Australian Renewable Energy Agency has reported that the battery under test experienced an accelerated capacity fade relative to the LG data sheets, which may be attributed to its lack of active cooling systems.
LG Chem has some safety guidelines for installing and operating the battery system used in the Sunrun Brightbox.
Complementary Technical Systems
The Sunrun brightbox requires solar production infrastructure to operate, and can be incorporated into existing solar system or installed with a new system.
Academic Research and References
Alnaser, W. and Alnaser, N., 2019, The Impact of the Rise of Using Solar Energy in GCC Countries, Renewable Energy and Sustainable Buildings, pp. 167-183.
Attanasio, D., 2017, Conference Proceedings Report: Transforming the U.S. Electric System: Where State and Federal Initiatives Meet, George Washington Journal of Energy and Environmental Law, p. 121.
Sandoval, C., 2018, Net Neutrality Powers Energy and Forestalls Climate Change, San Diego Journal of Climate and Energy Law.
Spector, J., 2019, Sunrun Puts Up Strong Deployment and Sales Growth as It Prepares for ITC Stepdown, Greentechmedia
Compliance with regulations
This product has been evaluated for capacity degradation by certified third-party laboratories.