Illustration

String inverterDelta Electronics

Delta Electronics M10-4-TL-US

Name: Delta Electronics M10-4-TL-US
Brand: Delta Electronics

String inverter. 2 models, 8.32 kW–9.6 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Aug 11, 2020

Model

Rated AC power9.6 kW
CEC weighted efficiency97.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 2 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
M10-4-TL-US	8.32 kW	208 V	8.38 kW	8.38 kW	97.5%	280–480 V	Aug 11, 2020	SB
M10-4-TL-US	9.6 kW	240 V	9.67 kW	9.67 kW	97.5%	280–480 V	Aug 11, 2020	SB

DC input (PV side)

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

CEC test DC voltages (min / nom / max)280 / 380 / 480 V
DC input at rated output (CEC test)9.95 kW

Efficiency

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

CEC weighted efficiency97.5%
Night-time standby (tare)1.38 W
Power to start converting22.8 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 — CSA Group, certificate Jun 2, 2022
UL 1741 SA (SA8–SA13)Yes — CSA Group
Firmware tested (SA)1.6.2
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)Yes (attested Aug 11, 2020)
Built-in meterYes
CEC listedAug 11, 2020
Last CEC updateFeb 1, 2023

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

Monitoring & communication

CEC Grid Support Inverter List (Oct 7, 2026)

Built-in production meterBuilt-in meter (CEC listing)

Panel compatibility & string sizing

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

CityColdest air, °CHottest cell, °C

M10-4-TL-US: max DC 480 V · MPPT 280–480 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	no fit	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	no fit	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	12–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	11–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	11–11	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	11–11	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	11–11	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	11–11	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	6–6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	12–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	11–11	—
Tesla TSP-420	420 W	43.4 V	27.7 V	11–11	—

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 9.6 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
Delta Electronics M10-4-TL-US	8.32 kW–9.6 kW	97.5%	280–480 V	Yes	2020	0
Tesla 1538000-xx-y	6.66 kW–7.68 kW	98.0%	270–480 V	Yes	2021	74
GoodWe GEPx.x-1-US30	4.33 kW–11.4 kW	97.0%	143–500 V	Yes	2022	—
GoodWe GW11K4-MS-US30	9.88 kW–11.4 kW	97.0%	217–500 V	Yes	2022	—
GoodWe GWxxxx-MS-US30	4.33 kW–9.6 kW	97.0%	143–500 V	Yes	2022	—

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

About Delta Electronics

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerDelta Electronics
Listed in CEC asDelta Electronics
Websitedelta-americas.com
Models on CEC lists138

Other series

DPxxxU-US-XXMxxU_260MxxU_280

Questions & answers

How efficient is the Delta Electronics M10-4-TL-US?

The California Energy Commission lists a weighted efficiency of 97.5% for Delta Electronics M10-4-TL-US models, measured at six power levels and three DC voltages.

What sizes does the Delta Electronics M10-4-TL-US come in?

The CEC list includes 2 models from 8.32 kW to 9.6 kW AC: M10-4-TL-US, M10-4-TL-US.

Is the Delta Electronics M10-4-TL-US certified to UL 1741 SB?

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

What is the M10-4-TL-US’s DC input voltage range?

CEC tested it at 280–480 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).
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).