Hoymiles HAXES-xx.xk-4P

Name: Hoymiles HAXES-xx.xk-4P
Brand: Hoymiles

53.6 kWh · 3.8–11.5 kW · Lithium Iron Phosphate · direct PV input · 6 configurations

UL 9540UL 1741 SBCEC listed · Jul 21, 2025

Overview

CEC Energy Storage System List

HAXES-xx.xk-4P: 53.6 kWh nameplate energy; 3.8–11.5 kW continuous; lithium iron phosphate; accepts solar panels directly (DC-coupled).

CEC Energy Storage System List · 6 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
HAXES-3.8k-4P	53.6 kWh	3.84 kW	240 V	—	Jul 21, 2025
HAXES-4.8k-4P	53.6 kWh	4.8 kW	240 V	—	Jul 21, 2025
HAXES-6.0k-4P	53.6 kWh	6 kW	240 V	—	Jul 21, 2025
HAXES-7.6k-4P	53.6 kWh	7.68 kW	240 V	—	Jul 21, 2025
HAXES-9.6k-4P	53.6 kWh	9.6 kW	240 V	—	Jul 21, 2025
HAXES-11.5k-4P	53.6 kWh	11.52 kW	240 V	—	Jul 21, 2025

CEC Energy Storage System List

NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List

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).

CEC Energy Storage System List

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

CEC Energy Storage System List

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
Sol-Ark L3 HVR	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	7
EG4 Electronics PP-16/280A3-18K1-AWLL	43 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-16/280A3-18K2-AWLL	43 kWh	20.8–24 kW	Lithium Iron Phosphate	10 years	—
Power Center Duracell	14–42 kWh	5 kW	Lithium Iron Phosphate	—	—
Sol-Ark L3 HV-xxKWH-xxK	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	—

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

How much energy does the Hoymiles HAXES-xx.xk-4P store?

53.6 kWh nameplate, per the California Energy Commission list.

Is the HAXES-xx.xk-4P UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by csa group).

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
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).