Home battery specs, sourced and compared

Every spec below is transcribed from the manufacturer datasheet and dated. We take no money from installers or manufacturers, so where a number is not published, we say so instead of guessing.

Sold new in 2026

Anker SOLIX X1

10, 15, or 20 kWh nominal per module (usable not published)LFP6 kW

high-surge modular backup

Enphase IQ Battery 5P

5 kWhLFP3.84 kW

modular, start-small backup

Enphase IQ Battery 10C

10 kWhLFP7.08 kW

microinverter whole-home backup

FranklinWH aPower 2

15 kWhLFP10 kW

whole-home backup with big surge loads

Generac PWRcell

up to 18 kWhNMC10.5 kW

generator-brand backup ecosystem

LG Energy Solution Home 8

14.4 kWhchem n/a7.5 kW

all-in-one whole-home backup

Panasonic EverVolt 2.0

up to 18 kWhLFP7.6 kW

high-capacity modular stacks

Qcells Q.HOME CORE

up to 18 kWhLFP7.6 kW

Qcells solar pairings

SolarEdge Home Battery (400V)

9.7 kWhchem n/a5 kW

existing SolarEdge solar owners

sonnen sonnenCore+

10 kWhLFP4.8 kW

cycle-life and warranty focus

Tesla Powerwall 3

13.5 kWhchem n/a11.5 kW

solar-paired whole-home backup

Head to head

Discontinued (kept for reference)

SunPower SunVault →

The brand on the box is not what makes a battery worth it. Your rate plan, usable capacity, and local incentives are. Run the Worth It calculator.