Illustration

Hybrid inverterSRNE Solar

SRNE Solar SEI-16K-U3P

Name: SRNE Solar SEI-16K-U3P
Brand: SRNE Solar

Hybrid inverter, dc-coupled hybrid (pv + battery). 3 models, 14 kW–18 kW AC at 208 V.

UL 1741 SBCEC listed · Sep 21, 2026

Model

Rated AC power16 kW
CEC weighted efficiency97.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · 3 models

Model	Nominal AC	Grid voltage	CEC continuous	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
SEI-14K-U3P	14 kW	208 V	14 kW	96.5%	135–500 V	Sep 21, 2026	SB
SEI-16K-U3P	16 kW	208 V	16.1 kW	97.0%	150–500 V	Sep 21, 2026	SB
SEI-18K-U3P	18 kW	208 V	18.1 kW	97.0%	160–500 V	Sep 21, 2026	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)

CEC test DC voltages (min / nom / max)150 / 330 / 500 V

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026)

CEC weighted efficiency97.0%
Night-time standby (tare)37.19 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 — Intertek, certificate May 14, 2026
UL 1741 SA (SA8–SA13)No
Volt-VAr with reactive power priority (SA13)No
Freq-Watt / Volt-Watt (SA14–15)No
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceNo
Anti-islanding method groupsGroups 1 (manufacturer-reported)
CEC listedSep 21, 2026

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

Panel compatibility & string sizing

CEC Grid Support Inverter List (Oct 7, 2026) · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

SEI-16K-U3P: max DC 500 V · MPPT 150–500 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	5–10	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	5–10	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	6–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	6–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	6–12	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	6–12	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	6–12	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	6–12	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	4–7	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	6–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	6–12	—
Tesla TSP-420	420 W	43.4 V	27.7 V	6–11	—

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

Compare with similar 16 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits

Inverter	Power	CEC weighted eff.	DC test window	UL 1741 SB	Latest CEC	SoCal permits
SRNE Solar SEI-xxK-U3P	14 kW–18 kW	97.0%	150–500 V	Yes	2026	0
Shenzhen Lux Power Technology LXP-LB-US xK	8 kW–16 kW	97.0%	210–480 V	Yes	2025	1
SRNE Solar HEBP48150U320-H	15 kW–15 kW	96.5%	135–500 V	Yes	2026	—
SRNE Solar HEBP48160U340-H	16 kW–16 kW	96.5%	150–500 V	Yes	2026	—
SRNE Solar HEBP48180U380-H	18 kW–18 kW	96.5%	160–500 V	Yes	2026	—

Same type and grid voltage, power range covering this model; same fields from the same sources.

About SRNE Solar

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerSRNE Solar
Listed in CEC asSRNE Solar Co.,Ltd
Models on CEC lists88

Other series

HEBP48150U320-HHEBP48160U340-HHEBP48180U380-HSEI-xxK-UBPHEBP48100U240-ProHEBP48114U240-ProHEBP48120U240-ProHEBP4880U240-ProSEI-8K-UPROSEI-xxK-UPROHESP48100U200-HHESP48120U200-H

Questions & answers

How efficient is the SRNE Solar SEI-xxK-U3P?

The California Energy Commission lists a weighted efficiency of 96.5–97.0% for SRNE Solar SEI-xxK-U3P models, measured at six power levels and three DC voltages.

What sizes does the SRNE Solar SEI-xxK-U3P come in?

The CEC list includes 3 models from 14 kW to 18 kW AC: SEI-14K-U3P, SEI-16K-U3P, SEI-18K-U3P.

Is the SRNE Solar SEI-xxK-U3P certified to UL 1741 SB?

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

Can the SRNE Solar SEI-xxK-U3P be used with a battery?

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

What is the SEI-16K-U3P’s DC input voltage range?

CEC tested it at 150–500 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) — 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).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).