Illustration

MicroinverterQcells

Qcells Q.PEAK DUO BLK-G6+/AC 340

Name: Qcells Q.PEAK DUO BLK-G6+/AC 340
Brand: Qcells

Microinverter. 2 models, 340 W–345 W AC at 240 V.

CEC listed · Jul 13, 2020Installed in 1 SoCal permit

Model

Rated AC power340 W
CEC weighted efficiency97.0%

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
Q.PEAK DUO BLK-G6+/AC 340	340 W	240 V	290 W	290 W	97.0%	27–45 V	Jul 13, 2020	—
Q.PEAK DUO BLK-G6+/AC 345	345 W	240 V	290 W	290 W	97.0%	27–45 V	Jul 13, 2020	—

2 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)27 / 36 / 45 V
DC input at rated output (CEC test)299 W

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)0.03 W
Power to start converting1.9 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)V04.18.02
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 Jul 13, 2020)
CEC listedJul 13, 2020
Last CEC updateApr 2, 2024

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

Installed in Southern California

building permits

Permits name it

Feb 2021

Jurisdictions so far

LA County (unincorp.) (1)

6.8 kW

Typical system

median of 1 permits

Model named in permit

Q.PEAK DUO BLK-G6+/AC 340

Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Compare with similar 340 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.PEAK DUO BLK-G6+/AC	340 W–345 W	97.0%	27–45 V	—	2020	1
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.PEAK DUO BLK-G6+/AC?

The California Energy Commission lists a weighted efficiency of 97.0% for Qcells Q.PEAK DUO BLK-G6+/AC models, measured at six power levels and three DC voltages.

What sizes does the Qcells Q.PEAK DUO BLK-G6+/AC come in?

The CEC list includes 2 models from 340 W to 345 W AC: Q.PEAK DUO BLK-G6+/AC 340, Q.PEAK DUO BLK-G6+/AC 345.

Is the Qcells Q.PEAK DUO BLK-G6+/AC certified to UL 1741 SB?

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

What is the Q.PEAK DUO BLK-G6+/AC 340’s DC input voltage range?

CEC tested it at 27–45 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 — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Feb 2021). Equipment matched from permit descriptions by model number.