Home batteries
Battery storage for backup power and time-of-use arbitrage.
Buyer's guide: Home batteries: continuous power, not usable kWh, is the spec buyers get wrongWe hold full sourced data on 11 home batteries, each with a specification traced to its source and cross-checked against owner reports.
All the home batteries we have data on
Sorted by data completeness.
Anker SOLIX X1X1-B5-H
Modular LFP battery, 5 kWh per module scaling to 180 kWh across up to 6 modules and multiple parallel systems, 6 kW on-grid / 6.6 kW backup continuous power per single-module system, up to 90.2% round-trip efficiency.
Enphase IQ Battery 5P
Modular 5 kWh LFP battery, stacked in multiples, with a 15-year / 6,000-cycle warranty.
FranklinWH aPower 2
15 kWh LFP battery with 10 kW continuous output and a 15-year / 60 MWh throughput warranty.
Generac PWRcell 2APKE00076
Modular NMC battery, 3 kWh per module up to 6 modules (18 kWh usable max), with an integrated hybrid inverter and up to 10.5 kW continuous output.
LG RESU16H Prime
16 kWh DC-coupled high-voltage (400V) NMC battery, 7 kW continuous / 11 kW peak, requiring a separately purchased compatible hybrid inverter (SolarEdge, Outback Power, SMA).
SolarEdge NexisK-5BLCK-UNX-01A-K-5BLCK
Modular high-voltage LFP battery, 4.65 kWh per block up to 4 blocks (18.6 kWh usable in a single stack), 93% DC peak round-trip efficiency, launched for US orders 2026-07-13.
Tesla Powerwall 3
13.5 kWh LFP battery with an integrated solar inverter and 11.5 kW continuous output.
Owners: 1 watch-out 2 reports →sonnen sonnenCore+ 10SCORE-P10
10 kWh AC-coupled LFP battery (two 5 kWh sonnenModule4 units), 4.8 kW continuous, UL 9540 / UL 9540A / UL 1741 / UL 1973 certified.
Bluetti EP900 + 2xB500EP900+2B500
9 kW continuous LFP whole-home backup system built from a fixed EP900 power hub plus stackable B500 battery modules (4.464 kWh usable each; this configuration uses two, 8.928 kWh total), 10-year warranty.
EcoFlow OCEAN ProEF-BATTERYPACK-10kWh-US
10 kWh LFP battery module, 10 kW DC continuous discharge per module, IP67-rated, stackable to 80 kWh with a 15-year warranty.
Lithion Stack'dHG-2-STACK
14.4 kWh LFP battery bank (3x 4.8 kWh modules), rated up to 14.4 kW continuous output, stackable to 38.4 kWh per stack and further in parallel, with a 10-year warranty. Manufactured by Lithion Battery Inc., marketed under the HomeGrid consumer brand.
What the specifications mean
Usable capacity (kWh)
Energy actually available to the house, after depth-of-discharge limits.
Always compare usable capacity, not nameplate. The gap between the two can be 10%.
Continuous power output (kW)
Sustained power the battery can deliver.
Capacity determines how long you can run; continuous power determines what you can run at once. A well pump or a heat pump starting up needs real power, not just energy.
Cell chemistry
The lithium chemistry used in the cells.
LFP (lithium iron phosphate) is now standard for home storage: longer cycle life and far better thermal safety than the NMC chemistry used in older products.
Parts warranty (yr)
Standard parts warranty term with registration.
Solar modules carry 25-40 year terms; mechanical equipment rarely exceeds 12. Check whether the term requires registration within a deadline — many do, and missing it silently drops you to a much shorter base warranty.