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
UL 1741 SB (IEEE 1547-2018)Yes
UL 1741 SA (Rule 21)No
CSIP (IEEE 2030.5)No
JA12 declaration (Title 24)No
Monitor Key Data schedulingNo
Compare with similar batteries
CEC Energy Storage System List
Battery
Energy
Continuous power
Chemistry
Warranty
SoCal permits
Enphase Energy ENCHARGE-10
10.1 kWh
3.84 kW
Lithium Iron Phosphate
10 years
197
Enphase Energy IQ Battery 10C
10 kWh
7.08 kW
Lithium Iron Phosphate
—
118
Enphase Energy ENCHARGE-10T
10.1 kWh
3.84 kW
Lithium Iron Phosphate
15 years
105
Qcells Q.HOME CORE Ax.xBx.x
13.1 kWh
7.6 kW
Lithium Ion
—
13
Qcells Q.HOME CORE Ax.xBx.x US.1
13.1 kWh
7.84 kW
Lithium Ion
—
4
Enphase Energy Q Battery 10C
10 kWh
7.08 kW
Lithium Iron Phosphate
—
—
Same segment, similar capacity; each row from the same sources.
Questions & answers
How much energy does the BST POWER (SHENZHEN) PBS-DG-ACxx store?
5.1–10.2 kWh nameplate, per the California Energy Commission list.
Is the PBS-DG-ACxx UL 9540 certified?
Yes — the CEC list shows UL 9540 certification (certified by intertek).
Sources
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).
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