Qcells Q.TRON BLK M-G2+/AC 420

Name: Qcells Q.TRON BLK M-G2+/AC 420
Brand: Qcells

Microinverter. 7 models, 405 W–445 W AC at 240 V.

UL 1741 SBCEC listed · Aug 1, 2024

Model

Rated AC power420 W
CEC weighted efficiency97.0%

Models & power ratings

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

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
Q.TRON BLK M-G2+/AC 405	405 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 410	410 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 415	415 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 420	420 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 425	425 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 430	430 W	240 V	349 W	349 W	97.0%	31–40 V	Aug 1, 2024	SB
Q.TRON BLK M-G2+/AC 445	445 W	240 V	349 W	349 W	97.0%	31–40 V	Dec 22, 2025	SB

7 more listings are microinverters sold only inside AC modules — not shown here.

DC input (PV side)

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

CEC test DC voltages (min / nom / max)31 / 34 / 40 V
DC input at rated output (CEC test)361 W

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)0.27 W
Power to start converting2.4 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 — UL, certificate Feb 29, 2024
UL 1741 SA (SA8–SA13)Yes — UL
Firmware tested (SA)MI10US0701
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 1, 2024)
Power control system (PCS)Stated in CEC listing (power control system)
Built-in meterYes
CEC listedAug 1, 2024
Last CEC updateDec 22, 2025

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)

Compare with similar 420 W 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
Qcells Q.TRON BLK M-G2+/AC	405 W–445 W	97.0%	31–40 V	Yes	2025	0
Enphase Energy IQ8 Series	240 W–633 W	97.5%	25–95 V	44 of 45	2025	1,104
Enphase Energy IQ7 Series	190 W–384 W	97.5%	22–64 V	114 of 119	2022	471
Hoymiles HM-xxxNT	295 W–1.44 kW	96.5%	29–48 V	11 of 12	2023	3
Enphase Energy IQ9 Series	405 W–440 W	97.5%	28–45 V	Yes	2026	—

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

About Qcells

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerQcells
Listed in CEC asQcells North America
Parent companyHanwha
Websiteq-cells.com
Models on CEC lists1504

Other series

Q.MI.380C-G2Q.MI.xxxB-P2Q.MICRO.380C-G2Q.MICRO.xxxB-P2

Questions & answers

How efficient is the Qcells Q.TRON BLK M-G2+/AC?

The California Energy Commission lists a weighted efficiency of 97.0% for Qcells Q.TRON BLK M-G2+/AC models, measured at six power levels and three DC voltages.

What sizes does the Qcells Q.TRON BLK M-G2+/AC come in?

The CEC list includes 7 models from 405 W to 445 W AC: Q.TRON BLK M-G2+/AC 405, Q.TRON BLK M-G2+/AC 410, Q.TRON BLK M-G2+/AC 415, Q.TRON BLK M-G2+/AC 420, Q.TRON BLK M-G2+/AC 425, Q.TRON BLK M-G2+/AC 430, Q.TRON BLK M-G2+/AC 445.

Is the Qcells Q.TRON BLK M-G2+/AC certified to UL 1741 SB?

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

What is the Q.TRON BLK M-G2+/AC 420’s DC input voltage range?

CEC tested it at 31–40 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).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.