Illustration

String inverterABB

ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U

Name: ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U
Brand: ABB

String inverter. 2 models, 5 kW AC at 208 V / 240 V.

CEC listed · Aug 21, 2020Rapid shutdown

Model

Rated AC power5 kW
CEC weighted efficiency96.5%

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
UNO-DM-5.0-TL-PLUS-US-SZ-RA-U	5 kW	208 V	4.6 kW	4.6 kW	96.5%	240–480 V	Aug 21, 2020	—
UNO-DM-5.0-TL-PLUS-US-SZ-RA-U	5 kW	240 V	5 kW	5 kW	96.5%	200–480 V	Aug 21, 2020	—

DC input (PV side)

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

CEC test DC voltages (min / nom / max)200 / 355 / 480 V
DC input at rated output (CEC test)5.17 kW

Efficiency

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

CEC weighted efficiency96.5%
Night-time standby (tare)1 W
Power to start converting30.8 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.)No
UL 1741 SA (SA8–SA13)Yes — TUV Rheinland of North America
Firmware tested (SA)1913B
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 21, 2020)
Built-in meterYes
CEC listedAug 21, 2020

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

Safety & protection

CEC Grid Support Inverter List (Oct 7, 2026)

Rapid shutdown (NEC 690.12)Yes (per CEC listing description)
Arc-fault protection (UL 1699B)Yes (per CEC listing description)

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

UNO-DM-5.0-TL-PLUS-US-SZ-RA-U: max DC 480 V · MPPT 200–480 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	7–9	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	7–9	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	8–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	8–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	8–11	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	8–11	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	8–11	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	8–11	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	5–6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	8–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	8–11	—
Tesla TSP-420	420 W	43.4 V	27.7 V	8–11	—

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 5 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
ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U	5 kW–5 kW	96.5%	200–480 V	—	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 GWxxxx-MS-US30	4.33 kW–9.6 kW	97.0%	143–500 V	Yes	2022	—
GoodWe GWxxxxA-MS	5 kW–9.6 kW	97.5%	210–480 V	Yes	2021	—

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

About ABB

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerABB
Listed in CEC asABB
Models on CEC lists212

Other series

PVS-xx-TL-R-USPVS-xx-TL-S-R-USPVS-xx-TL-SC-R-USUNO-DM-x.x-TL-PLUS-US-SB-RA-QUNO-DM-x.x-TL-PLUS-US-SB-RA-QU

Questions & answers

How efficient is the ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U?

The California Energy Commission lists a weighted efficiency of 96.5% for ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U models, measured at six power levels and three DC voltages.

What sizes does the ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U come in?

The CEC list includes 2 models from 5 kW to 5 kW AC: UNO-DM-5.0-TL-PLUS-US-SZ-RA-U, UNO-DM-5.0-TL-PLUS-US-SZ-RA-U.

Is the ABB UNO-DM-5.0-TL-PLUS-US-SZ-RA-U certified to UL 1741 SB?

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

What is the UNO-DM-5.0-TL-PLUS-US-SZ-RA-U’s DC input voltage range?

CEC tested it at 200–480 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).