Illustration

MicroinverterQcells

Qcells Q.MI.349B-G1

Name: Qcells Q.MI.349B-G1
Brand: Qcells

Microinverter. 1 model, 349 W AC at 240 V.

UL 1741 SBCEC listed · May 1, 2024Installed in 69 SoCal permits

Rated AC power349 W
CEC weighted efficiency97.0%

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

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power349 W
CEC-measured continuous output349 W
Grid voltage240 V
Phasesplit-phase 120/240 V

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)
CEC listedMay 1, 2024
Last CEC updateFeb 21, 2025

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

Battery & storage pairings

building permits

Batteries installed with it in SoCal

Tesla Powerwall 3

Qcells Q.HOME

Tesla Powerwall 3 Expansion

What it's installed with

building permits

Panels

Qcells Q.TRON

Qcells Q.PEAK DUO

Batteries

Tesla Powerwall 3

Qcells Q.HOME

Tesla Powerwall 3 Expansion

Gateways & interfaces

Qcells Q.HOME Hub

Tesla Backup Switch

Tesla Backup Gateway

IronRidge (model not specified)

Permits naming both; 69 of 69 permits list other equipment.

Installed in Southern California

building permits

Permits name it

Aug 2025 – Sep 2026

Jurisdictions so far

Palmdale (31), LA County (unincorp.) (25), Chula Vista (12), San Diego

1,030

Units listed

median 15 per permit

6.5 kW

Typical system

median of 61 permits

Permits over time

Model named in permit

Q.MI.349B-G1

Top ZIP codes

ZIP 9355015
ZIP 9355113
ZIP 935523
ZIP 917483
ZIP 910013
ZIP 910072
ZIP 910062
ZIP 935102
Other ZIP codes14

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.

Who installs Q.MI.xxxB-G1 in SoCal

building permits · CSLB License Master

Qcells For New Homes

Irvine · CSLB #1090641

33 installsMay 2026 – Sep 2026Palmdale, Chula Vista

Lgcy Electric

Lehi · CSLB #1099095

8 installsJun 2026 – Sep 2026Chula Vista

Capital Energy LLC

Tempe · CSLB #1142165

1 installSep 2026Palmdale

Compare with similar 349 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.MI.xxxB-G1	349 W–349 W	97.0%	31–40 V	Yes	2024	68
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.MI.xxxB-G1?

The California Energy Commission lists a weighted efficiency of 97.0% for Qcells Q.MI.xxxB-G1 models, measured at six power levels and three DC voltages.

Is the Qcells Q.MI.xxxB-G1 certified to UL 1741 SB?

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

Can the Qcells Q.MI.xxxB-G1 be used with a battery?

In Southern California permits it was installed with Tesla Powerwall 3, Qcells Q.HOME, Tesla Powerwall 3 Expansion.

What is the Q.MI.349B-G1’s DC input voltage range?

CEC tested it at 31–40 V DC.

Who installs it in Southern California?

Building permits name this series 69 times (Aug 2025 – Sep 2026). The most active licensed installers are Qcells For New Homes, Lgcy Electric, Capital Energy LLC.

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 — City of Palmdale (May 2026 – Sep 2026); Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Aug 2025 – Sep 2026); City of Chula Vista (Jun 2026 – Sep 2026); San Diego County (May 2026). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.