Five top options on the home battery market

EnergySage is an online database that helps consumers identify average energy battery-storage system costs by size, top battery models and nearby storage system installers. The database was launched in 2013 with help from the U.S. Department of Energy to provide consumers with a platform to do comparison shopping for a solar energy system. Get information on energysage.com, and type in your ZIP code to find the nearest installers. Estimated battery prices do not include installation, but you can find an installer to get a custom quote through EnergySage’s website (scroll to Marketplace).

The five most frequently referenced batteries in the EnergySage database are:

Enphase Energy IQ 10

A lithium-ion phosphate battery with a 10.5 kilowatt-hour capacity that can provide 3.84 kilowatts of continuous power, enough to operate an air-conditioning system for one hour. It comes with a 10-year warranty. The 346-pound battery is about 26 inches tall, 42 inches wide and has a depth of 12½ inches. Battery cost ranges from $7,000 to $9,000.

Tesla Powerwall 2

A lithium-ion battery with a 14.04 kilowatt-hour capacity that can provide 5 kilowatts of continuous power. It also has a 10-year warranty. The 250-pound battery is approximately 45 inches tall, 30 inches wide and has a depth of 6 inches. It costs $11,500, but all Bluebonnet members are eligible for a $500 Tesla backup switch discount. The switch makes the installation process easier.

Generac PWRcell Battery (M3)

A lithium-ion battery with an 11.6 kilowatt-hour capacity. It can provide 3.4 kilowatts of continuous power and has a 10-year warranty. The battery is about 68 inches tall, 22 inches wide and has a depth of 10 inches. It sells for $12,435 from Generac.

LG Energy Solution Resu Prime 16H

A lithium-ion battery with a 16 kilowatt-hour capacity that can provide 7 kilowatts of continuous power. It also has a 10-year warranty and weighs 352 pounds. It’s about 43 inches tall, 20 inches wide and has a depth of 12 inches. Battery cost ranges from $10,000 to $13,000.

Sonnen ecoLinx 12

A lithium-ion battery with a 12 kilowatt-hour capacity. The battery can provide 8 kilowatts of continuous power and comes with a 15-year warranty. It measures approximately 84 inches tall, 26 inches wide, and has a depth of 19 inches. Five authorized dealers sell these batteries in Texas for approximately $36,000, before installation. The batteries lose their charging efficiency more slowly than competing products and have the ability to integrate with smart home devices, such as a Google Nest.

The Tesla backup switch — designed to simplify installation of the company’s Powerwall solar battery storage system — was tested by Bluebonnet Electric Cooperative in 2021.

Bluebonnet reviewed the device for use in conjunction with Bluebonnet meters. It switches automatically between using stored renewable electricity and Bluebonnet-distributed electricity. Bluebonnet approved the backup switch for use on its system last year.

The use of the backup switch cuts Powerwall installation time from 10 hours to about one hour by avoiding the need to extensively rewire the connection from a home's breaker panel, according to Tesla’s website. Since October 2021, every Tesla Powerwall whole-home backup system (which costs $11,500 before installation) comes with a Tesla backup switch.

The switch also provides greater safety to Bluebonnet’s line workers. If a power outage is detected, the switch automatically disconnects the battery-stored electricity from Bluebonnet’s lines. That prevents the stored power from being pushed back onto the lines, keeping line workers who are restoring power safe.

Licensed electric battery storage installers can find specifications for installing Tesla backup switches here.