Updated on January 4, 2024


Created on September 26, 2019

Sunrun Brightbox

Upcoming Update

The Sunrun Brightbox is a solar battery system.

Developed By
  1. Sunrun
Tested By
  • Australian Renewable Energy Agency (ARENA)
Content Partners


Product Description

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.

Target SDGs

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

Competitive Landscape

Direct competitors include Tesla's Powerwall.

Manufacturing/Building Method

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)

7,000 Wp

Battery capacity (kWh; mAh)

9.8 kWh

Nominal battery voltage (V)

350 VDC

Battery type

Lithium ion

User replaceable battery (yes/no)


Remote system diagnostics (yes/no)


Payment structure

Purchased outright or leased

Mobile service required (yes/no)


Design Specifications

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

Product Schematics

Technical Support

Provided by the manufacturer

Replacement Components

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


Evaluation methods

This product has been evaluated for capacity degradation by certified third-party laboratories.

Other Information

LG has released an installation manual for the Energy Storage System (ESS) used in the Sunrun Brightbox. Battery Test Report

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