EPC Power 50-100181

Name: EPC Power 50-100181
Brand: EPC Power

Hybrid inverter, dc-coupled hybrid (pv + battery). 3 models, 1,043 kW–1,500 kW AC at 480 V / 600 V / 690 V.

UL 1741 SBCEC listed · Sep 3, 2024

Model

Rated AC power1,300 kW
CEC weighted efficiency98.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 3 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
50-100181	1,043 kW	480 V	1,044.2 kW	1,044.2 kW	98.0%	720–1,500 V	Sep 3, 2024	SB
50-100181	1,300 kW	600 V	1,304.2 kW	1,304.2 kW	98.5%	925–1,500 V	Sep 3, 2024	SB
50-100181	1,500 kW	690 V	1,504.9 kW	1,504.9 kW	98.5%	1,100–1,500 V	Sep 3, 2024	SB

Some models are also on the CEC Battery Inverter list — one product, two listings.

DC input (PV side)

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library

CEC test DC voltages (min / nom / max)925 / 1,225 / 1,500 V
DC input at rated output (CEC test)1,331.8 kW

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library

CEC weighted efficiency98.5%
Night-time standby (tare)248 W
Power to start converting2,569.4 W

CEC weighted efficiency is measured by an accredited lab at six power levels and three DC voltages — the number to compare between inverters.

Grid & smart-inverter certification

CEC Grid Support Inverter List (Oct 7, 2026)

UL 1741 SB (3rd ed.)Yes — TUV Rheinland, certificate Mar 4, 2024
UL 1741 SA (SA8–SA13)Yes — TUV Rheinland of North America
Firmware tested (SA)fe924e5
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)Yes
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedSep 3, 2024
Last CEC updateSep 3, 2024

UL 1741 SB is required for new interconnections in California (Rule 21) since 2026.

Panel compatibility & string sizing

NLR SAM inverter library · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

50-100181: max DC 1,500 V · MPPT 925–1,500 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold	Vmp hot	Panels per string	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 V	30.6 V	31–31	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	31–31	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	37–38	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	37–38	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	35–36	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	34–36	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	34–36	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	34–36	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	20–21	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	37–38	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	34–36	—
Tesla TSP-420	420 W	43.4 V	27.7 V	34–34	—

Voltage check only, from CEC panel data and NLR weather for the city. Final design must follow the inverter manual and NEC 690.7.

Questions & answers

How efficient is the EPC Power 50-100181?

The California Energy Commission lists a weighted efficiency of 98.0–98.5% for EPC Power 50-100181 models, measured at six power levels and three DC voltages.

What sizes does the EPC Power 50-100181 come in?

The CEC list includes 3 models from 1,043 kW to 1,500 kW AC: 50-100181, 50-100181, 50-100181.

Is the EPC Power 50-100181 certified to UL 1741 SB?

Yes — the CEC Grid Support Inverter List shows UL 1741 SB for all models.

Can the EPC Power 50-100181 be used with a battery?

The CEC lists it as a dc-coupled hybrid (pv + battery).

What is the 50-100181’s DC input voltage range?

CEC tested it at 925–1,500 V DC.

Sources

California Energy Commission — Grid Support Inverter List (solar and battery inverters), data as of Oct 7, 2026. Manufacturer-reported, confirmed by CEC against certificates and test reports.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
California Energy Commission — PV Module List (module electrical data for the compatibility check).
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).