Deye SE-G1-xK-US

Name: Deye SE-G1-xK-US
Brand: Deye

5.1 kWh · 5–15 kW · Lithium Iron Phosphate · direct PV input · 3 configurations

UL 9540UL 1741 SBCEC listed · Oct 1, 2024

Overview

CEC Energy Storage System List

SE-G1-xK-US: 5.1 kWh nameplate energy; 5–15 kW continuous; lithium iron phosphate; accepts solar panels directly (DC-coupled).

CEC Energy Storage System List · 3 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
SE-G1-5K-US	5.1 kWh	5 kW	240 V	—	Oct 1, 2024
SE-G1-8K-US	5.1 kWh	8 kW	240 V	—	Oct 1, 2024
SE-G1-15K-US	5.1 kWh	15 kW	240 V	—	Oct 1, 2024

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
Enphase Energy IQ Battery 5P	5 kWh	3.33–3.84 kW	Lithium Iron Phosphate	15 years	788
Fortress Power eFlex	5.4 kWh	5 kW	Lithium Iron Phosphate	—	—
Villara Energy Systems VillaGrid	5.8 kWh	8 kW	Lithium Titanate Oxide	20 years	—
Villara Energy Systems VillaGrid	5.8 kWh	8 kW	Lithium Titanate Oxide	20 years	—
Shanghai PYTES Energy E-BOX-48100R	5.1 kWh	2.56 kW	Lithium Ion	10 years	1
APsystems (Altenergy Power System) APbattery	5.2 kWh	5 kW	Lithium Iron Phosphate	—	—

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

How much energy does the Deye SE-G1-xK-US store?

5.1 kWh nameplate, per the California Energy Commission list.

Is the SE-G1-xK-US UL 9540 certified?

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

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).