Cali-GrafCali-Graf
For pros Sign in
15.4 kWh
Home battery systemDeye

Deye SE-G3-xxK-US

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

UL 9540UL 1741 SBCEC listed · Oct 1, 2024
  • Nameplate energy15.4 kWh
  • Continuous power5–15 kW
  • ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

SE-G3-xxK-US: 15.4 kWh nameplate energy; 5–15 kW continuous; lithium iron phosphate; accepts solar panels directly (DC-coupled).

Models & configurations

CEC Energy Storage System List · 3 listings
ModelEnergyPowerGrid voltageRound tripCEC listed
SE-G3-5K-US15.4 kWh5 kW240 V—Oct 1, 2024
SE-G3-8K-US15.4 kWh8 kW240 V—Oct 1, 2024
SE-G3-15K-US15.4 kWh15 kW240 V—Oct 1, 2024

Capacity & power

CEC Energy Storage System List

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List
CityDecemberJune
Los Angeles4.8 kW2.8 kW
Palmdale4.4 kW2.6 kW
Chula Vista4.1 kW2.9 kW
Huntington Beach4.5 kW3.1 kW
Riverside4.6 kW2.7 kW
Santa Clarita4.5 kW2.7 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).

Safety listings

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.

California grid & code compliance

CEC Energy Storage System List

Compare with similar batteries

CEC Energy Storage System List
BatteryEnergyContinuous powerChemistryWarrantySoCal permits
Tesla Powerwall 313.5 kWh5–11.5 kWLithium Ion, Lithium Iron Phosphate10 years2,115
Tesla AC Powerwall13.5 kWh5 kWLithium Ion—394
Tesla Powerwall +13.5 kWh5 kWLithium Ion10 years264
Qcells Q.HOME CORE Ax.xBx.x13.1 kWh7.6 kWLithium Ion—13
Generac PWRcell8.6–17.1 kWh3.4–6.7 kWLithium Ion—8
Qcells Q.HOME CORE Ax.xBx.x US.113.1 kWh7.84 kWLithium Ion—4
Same segment, similar capacity; each row from the same sources.

Questions & answers

How much energy does the Deye SE-G3-xxK-US store?

15.4 kWh nameplate, per the California Energy Commission list.

Is the SE-G3-xxK-US UL 9540 certified?

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

Sources

  1. California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
  2. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
  3. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).