Delta Electronics M80U_280

Name: Delta Electronics M80U_280
Brand: Delta Electronics

String inverter. 3 models, 60 kW–100 kW AC at 480 V.

CEC listed · May 11, 2022

Model

Rated AC power83 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
M60U_280	60 kW	480 V	60 kW	60 kW	98.5%	550–840 V	May 11, 2022	—
M80U_280	83 kW	480 V	80 kW	80 kW	98.5%	550–840 V	May 11, 2022	—
M100U_280	100 kW	480 V	100 kW	100 kW	98.5%	550–840 V	May 11, 2022	—

DC input (PV side)

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

CEC test DC voltages (min / nom / max)550 / 710 / 840 V
DC input at rated output (CEC test)81.4 kW

Efficiency

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

CEC weighted efficiency98.5%
Night-time standby (tare)3.05 W
Power to start converting257.7 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.)No
UL 1741 SA (SA8–SA13)Yes — Intertek
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 May 11, 2022)
CEC listedMay 11, 2022

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

M80U_280: max DC 840 V · MPPT 550–840 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	no fit	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	no fit	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	no fit	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	20–20	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	20–20	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	20–20	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	12–12	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	no fit	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	20–20	—
Tesla TSP-420	420 W	43.4 V	27.7 V	no fit	—

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 83 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 MxxU_280	60 kW–100 kW	98.5%	550–840 V	—	2022	0
SolarEdge SExKUS	9 kW–330 kW	99.0%	100–1,400 V	16 of 19	2025	14
Solis (Ginlong Technologies) Solis-xxK-5G-US	75 kW–100 kW	98.5%	550–850 V	No	2020	3
SMA STP xx-US-80	27.5 kW–70 kW	97.5%	300–850 V	Yes	2026	—
Yaskawa Solectria Solar PVI xxTL-480	36 kW–100 kW	98.5%	340–850 V	3 of 4	2025	—

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_260M10-4-TL-US

Questions & answers

How efficient is the Delta Electronics MxxU_280?

The California Energy Commission lists a weighted efficiency of 98.5% for Delta Electronics MxxU_280 models, measured at six power levels and three DC voltages.

What sizes does the Delta Electronics MxxU_280 come in?

The CEC list includes 3 models from 60 kW to 100 kW AC: M60U_280, M80U_280, M100U_280.

Is the Delta Electronics MxxU_280 certified to UL 1741 SB?

The CEC list does not show UL 1741 SB certification for these models.

What is the M80U_280’s DC input voltage range?

CEC tested it at 550–840 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).