12.8 kWh

Battery moduleEG4 Electronics

EG4 Electronics WM48314AWXX

16 kWh · 10.2 kW · Lithium Iron Phosphate

UL 1973CEC listed · Feb 2, 2026

Usable energy12.8 kWh
Continuous power10.2 kW
Warranty10 years
ChemistryLithium Iron Phosphate

Overview

CEC Battery List

WM48314AWXX: 12.8 kWh usable energy; 10.2 kW continuous; lithium iron phosphate; 10 years warranty.

Capacity & power

CEC Battery List

Nameplate energy (CEC)16 kWh
Total energy (datasheet)16 kWh
Usable energy12.8 kWh
Depth of discharge80%
Max continuous discharge (CEC)10.2 kW
Peak power12.8 kW 3 sec
Full-power discharge timeabout 1.2 h at full power
Round-trip efficiency (datasheet)95%
ChemistryLithium Iron Phosphate
Battery voltage (DC, nominal)51.2 V

How long can it power your home?

Cali-Graf calculation

Average home load	Runtime from full
0.5 kW	≈ 25.6 h
1 kW	≈ 12.8 h
2 kW	≈ 6.4 h
3 kW	≈ 4.3 h
10.24 kW (full continuous power)	≈ 1.2 h

Runtime = 12.8 kWh usable (datasheet) ÷ load. A typical home averages 1–2 kW; air conditioning and EV charging use much more. Inverter and wiring losses shorten it.

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation

City	December	June
Los Angeles	4 kW	2.4 kW
Palmdale	3.7 kW	2.1 kW
Chula Vista	3.4 kW	2.4 kW
Huntington Beach	3.8 kW	2.6 kW
Riverside	3.8 kW	2.3 kW
Santa Clarita	3.8 kW	2.2 kW

Solar array size that refills the battery from empty in one average day, before the home uses any of it (NLR PVWatts v8, 20° south roof).

Installation & environment

CEC Battery List · EG4 Electronics datasheet

Ingress protectionIP67
Mountingfloor
Weight per kWh1 kWh

Warranty

CEC Battery List · EG4 Electronics datasheet

Warranty term10 years
Rated cycle life (spec, not warranty)10,000 cycles

Safety listings

CEC Battery List

UL 1973 (stationary battery)Certified by Intertek
Certificate date & editionDec 18, 2025 · Ed. 3 : 2022
UL 9540A (fire propagation test)Yes
Other standards on datasheetUL 9540A, UL 9540, UL 1973

UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

Full specifications

CEC Battery List · EG4 Electronics datasheet

Communicationrs485
Manufacturer websiteeg4electronics.com

Compare with similar batteries

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
LG Energy Solution RESU 10H Prime	9.6–16 kWh	5 kW	Lithium Ion	—	127
Qcells Q.SAVE	9–18 kWh	5.5–11.1 kW	Lithium Iron	10 years	30
EG4 Electronics WP-16/280-1AWLL	14.3 kWh	10.2 kW	Lithium Iron Phosphate	10 years	5
Tigo Energy TSB	9 kWh	3.5–5.2 kW	Lithium Iron Phosphate	11 years	2
FOXESS ECS4000-H5	25 kWh	14.4 kW	Lithium Iron Phosphate	—	1
RNG International Renogy X	20 kWh	10 kW	Lithium Iron Phosphate	10 years	1

Same segment, similar capacity; each row from the same sources.

Documents

manufacturer documents

PDF
EG4 WallMount 314Ah All Weather Battery – Spec Sheet
Datasheet · Feb 2026

Questions & answers

How much energy does the EG4 Electronics WM48314AWXX store?

12.8 kWh usable, per the manufacturer datasheet.

How long can the WM48314AWXX power a home?

About 12.8 hours at an average 1 kW load from a full charge (12.8 kWh usable); higher loads shorten it.

What warranty does the WM48314AWXX have?

10 years (datasheet).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
California Energy Commission — Battery List, data as of Oct 7, 2026.
EG4 Electronics — datasheet EG4 WallMount 314Ah All Weather Battery – Spec Sheet.
EG4 Electronics — document library on the manufacturer’s website (links above).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).