41.1″ · 1,045 mm wide · 1.26″ (32 mm) frame · 48.5 lb (22 kg)

Solar panelQcells

Qcells Q.PEAK DUO BLK ML-G10+ 400

Name: Qcells Q.PEAK DUO BLK ML-G10+ 400
Brand: Qcells

132 half-cut cells (6 × 22). Power classes 380–415 W in the CEC list; datasheet covers 385–405 W.

CEC listed · Aug 2, 2021UL 6173025-yr product + 25-yr performance warrantyPVEL Top Performer 2022, 2023Installed in 221 SoCal permits

Power class

Power (STC)400 WCEC nameplate
Efficiency≥20.4%datasheet minimum
%/°C Pmax−0.34CEC test: −0.362
Degradation / yr0.5%after year 1 (warranty)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · Qcells datasheet · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Q.PEAK DUO BLK ML-G10+ 380	380 W	45.16	11.01	36.09	10.53	≈19.4%	352 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 385	385 W	45.19	11.04	36.36	10.59	≥19.6%	357 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 390	390 W	45.23	11.07	36.62	10.65	≥19.9%	362 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 395	395 W	45.27	11.10	36.88	10.71	≥20.1%	367 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 400	400 W	45.30	11.14	37.13	10.77	≥20.4%	372 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 405	405 W	45.34	11.17	37.39	10.83	≥20.6%	376 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 410	410 W	45.37	11.20	37.64	10.89	≈20.9%	386 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10+ 415	415 W	45.41	11.23	37.89	10.95	≈21.1%	391 W	Sep 3, 2024

≈ efficiency = Pmax ÷ panel area 1.964 m² (datasheet size) for classes outside the datasheet.

CEC note: Formerly listed under Hanwha Q CELLS

Build & dimensions

Qcells datasheet · Cali-Graf calculation

Dimensions74 × 41.1 × 1.26 in1,879 × 1,045 × 32 mm
Module area1.96 m² (21.1 ft²)length × width
Weight48.5 lb (22 kg)
Cells132 half-cut cells (6 × 22)
Front glass0.13 in (3.2 mm) thermally pre-stressed glass with
Back coverComposite film
FrameBlack anodized aluminum
Junction box2.09–3.98 in × 1.26–2.36 in × 0.59–0.71 in
Cable / connector4 mm² Solar cable; (+) ≥ 49.2 in (1250 mm), (-) ≥ 49.2 in (1250 mm) · Stäubli MC4; IP68

Heat & cold behaviour

Qcells datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	Datasheet	CEC listing test
Pmax coefficient γ	−0.34 %/°C	−0.362 %/°C
Voc coefficient β	−0.27 %/°C	−0.270 %/°C
Isc coefficient α	+0.04 %/°C	+0.041 %/°C
Vmp coefficient	≈ −0.38 %/°C	—
Operating cell temperature	NMOT 43 ± 3 °C	NOCT 45.7 °C

Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

At normal operating conditions (NMOT, 800 W/m²) — datasheet

Class	Pmax, W	Voc, V	Isc, A	Vmp, V	Imp, A
385 W	288.8	42.62	8.90	34.59	8.35
390 W	292.6	42.65	8.92	34.81	8.41
395 W	296.3	42.69	8.95	35.03	8.46
400 W	300.1	42.72	8.97	35.25	8.51
405 W	303.8	42.76	9.00	35.46	8.57

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
380 W	280.7 W	34.21 V × 8.21 A	73.2 W	96%
385 W	284.4 W	34.46 V × 8.25 A	74.2 W	96%
390 W	288.1 W	34.71 V × 8.3 A	75.1 W	96%
395 W	291.8 W	34.96 V × 8.35 A	76.1 W	96%
400 W	295.4 W	35.19 V × 8.39 A	77 W	96%
405 W	299.1 W	35.44 V × 8.44 A	78 W	96%
410 W	290.7 W	35.05 V × 8.29 A	74.5 W	91%
415 W	295.2 W	35.46 V × 8.32 A	75.4 W	91%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

Max system voltage1,000 V (UL)
Max series fuse20 A
Fire rating (UL 61730)Type 2
Protection classClass II
Design load push / pull75 / 56 psf3,600 / 2,660 Pa
Test load push / pull113 / 84 psf5,400 / 4,000 Pa
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Certifications

CEC PV Module List (Oct 7, 2026) · Qcells datasheet

UL 61730IEC 61215IEC 61730Fire rating Type 2 (UL 61730)

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet
Fire rating Type 2 (UL 61730)datasheet

Warranty & degradation

Qcells datasheet

Product warranty25 years
Performance warranty25 years, linear
Year 1≥ 98%
Then≤ 0.5% / year
Year 10≥ 93.5%

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2022, 2023

PVEL Top Performer

this series

Tests passed as Top Performer

LID+LETID, PID

PVEL Scorecards

Qcells named Top Performer, 2016–2026

2023, 2026

RETC Overall Highest Achiever

Qcells, manufacturer level

PVEL Top Performer tests

Year	Product	Tests
2022	Q.PEAK DUO BLK ML-G10+	LID+LETIDPID
2023	Q.PEAK DUO BLK ML-G10+	LID+LETIDPID

Tested bill of materials

PVEL-tested factorySouth Korea
Cell technology (tested BOM)p-type PERC
Module design (tested BOM)Monofacial - glass//backsheet
Power class range tested355-400W

Details describe the tested sample, not every module of the series.

RETC PV Module Index — Qcells

Year	Recognition
2023	Overall Highest Achiever; High Achievement in Performance (Module efficiency, Pan file performance); High Achievement in Reliability (Damp heat test, Pid resistance, Thermal cycle test)
2024	High Achievement in Performance
2025	Performance High Achiever
2026	Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Conversion efficiency, Iam, Letid, Lid, PTC-to-STC, Temperature coefficient); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Sdml, Tc, Uvid, Budt, Damp heat, Hdt, Pid)

Inverter compatibility & string sizing

Qcells datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

48.1 V

Voc when cold

per panel

30.2 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

Min panels / string

MPPT from 60 V

Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.

String inverters most named in SoCal permits

Inverter	Max DC input	MPPT	Window source	Panels per string
Tesla 1538000-xx-y	600 V	60–480 V	datasheet	2–12
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–12
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–12
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–10

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	48.1 / 30.2 V	✓ Within range	1.38
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	48.1 / 30.2 V	✗ Not a match: module voltage below MPPT range	1.05
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	48.1 / 30.2 V	✓ Within range	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	48.1 / 30.2 V	✓ Within range	1.23
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	48.1 / 30.2 V	⚠ Works; below MPPT at peak heat	1.15

Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.

SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	670	12,067	6.08
Palmdale	1,835	734	13,212	6.69
Chula Vista	1,696	678	12,211	6.11
Huntington Beach	1,643	657	11,830	5.89
Riverside	1,696	678	12,211	6.21
Santa Clarita	1,724	690	12,413	6.28

Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Who installs Q.PEAK DUO BLK ML-G10+ panels in SoCal

building permits · CSLB License Master

221

Permits naming this series

Sep 2021 – Sep 2026

Licensed installers

CSLB license on the permit

Jurisdictions so far

LA County (unincorp.) (193), Palmdale (15), Huntington Beach (5), Chul

Lgcy Electric

Lehi · CSLB #1099095

5 installsFeb 2025 – Apr 2026San Diego County, Chula Vista

Livsmart

Henderson · CSLB #1111959

2 installsSep 2025 – Oct 2025Palmdale

Semper Solaris

El Cajon · CSLB #978152

2 installsNov 2023 – Mar 2024Palmdale

Aveyo

American Fork · CSLB #1110238

1 installFeb 2026Palmdale

Dutchmen Construction Incorporated

Hemet · CSLB #1070131

1 installJul 2025Palmdale

Ecosolar Usa Electrical LLC

Garden Grove · CSLB #1045300

1 installJun 2024Huntington Beach

Empower Home Services

Clovis · CSLB #1057693

1 installSep 2025Huntington Beach

Esp Contracting

Torrance · CSLB #619149

1 installJun 2026Palmdale

Los Angeles Solar Pros

Los Angeles · CSLB #1033488

1 installMay 2022Los Angeles

Semper Solaris Electric Inc

Oceanside · CSLB #1054537

1 installSep 2026Chula Vista

Solar Shoppers Construction

Palmdale · CSLB #1019939

1 installApr 2024Palmdale

Solar Tech Energy Systems Inc

El Cajon · CSLB #1106777

1 installApr 2026Chula Vista

Sun Solar Energy Solutions

Bakersfield · CSLB #1065395

1 installOct 2025Palmdale

Sunrun

Lehi · CSLB #750184

1 installSep 2026Huntington Beach

Permits over time

Power class named in permit

400 W

117

410 W

405 W

395 W

415 W

Top ZIP codes

ZIP 9100119
ZIP 9029019
ZIP 9172212
ZIP 917459
ZIP 917448
ZIP 935518
ZIP 935367
ZIP 912147
Other ZIP codes22

Typical system

median 7.6 kW, 19 panels (n = 147)

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

Installed together with

building permits

Microinverters

Enphase IQ8M

Enphase IQ8+

Enphase IQ7+

Enphase (model not specified)

Enphase IQ8D

Inverters

SolarEdge SE…H (HD-Wave)

Qcells Q.VOLT

Tesla Tesla Solar Inverter

Generac (model not specified)

SolarEdge (model not specified)

Optimizers

SolarEdge Power Optimizer

Generac (model not specified)

Batteries

Tesla Powerwall 3

Enphase IQ Battery 5P

Tesla Powerwall 2

Qcells Q.SAVE

Tesla Powerwall 3 Expansion

Number of permits naming both this panel series and the product; 198 of 221 permits list other equipment.

Compare with similar 400 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · building permits

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Qcells Q.PEAK DUO BLK ML-G10+ 400	400 W	≥20.4%	−0.362	45.3	11.14	product 2022, 2023	221
JA Solar JAM54S31-400/MR	400 W	≈21.1%	−0.329	37.07	13.79	product 2023, 2024	152
REC Group REC400AA Pure	400 W	≈22.3%	−0.256	48.8	10.25	brand 9× (2016–2025)	66
LONGi LR5-54HABB-400M	400 W	≈21.1%	−0.342	37.05	13.72	brand 9× (2017–2026)	64

Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.

About Qcells

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · RETC PV Module Index · building permits

ManufacturerQcells
Listed in CEC asHanwha Qcells (Qidong) Co. Ltd., Qcells North America
Parent companyHanwha
Websiteq-cells.com
PVEL Top Performer (manufacturer)11 Scorecards (2016–2026)
RETC PV Module Index2023, 2024, 2025, 2026
Current panel series in CEC list81

Other series by SoCal permits

Q.PEAK DUO BLK ML-G10.C+ · 124Q.TRON BLK M-G2+ · 40Q.TRON BLK M-G2.H+ · 33Q.TRON BLK M-G2.C+ · 24Q.TRON M-G2+ · 20Q.PEAK DUO-G8+ · 20

Questions & answers

How efficient is the Qcells Q.PEAK DUO BLK ML-G10+ 400?

The Qcells datasheet guarantees at least 20.4% module efficiency for the 400 W class (up to 20.6% for 405 W). 400 W over 1.96 m² equals about 204 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.34 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.6% below the STC rating.

How many panels fit on one string?

With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 2–12 panels per string (Voc at 2 °C = 48.1 V, Vmp at 74 °C cell = 30.2 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with Enphase IQ8PLUS-72-2-US microinverters?

Voltage check against the Enphase datasheet: Voc when cold 48.1 V vs max input 60 V; Vmp when hot 30.2 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

What does the warranty cover?

25 years on the product and 25 years linear on performance: at least 98% of rated power in year 1, then no more than 0.5% per year — at least 93.5% after 10 years (manufacturer datasheet).

How big and heavy is it?

74 × 41.1 × 1.26 in (1,879 × 1,045 × 32 mm), 48.5 lb (22 kg).

Has this panel been reliability-tested?

Q.PEAK DUO BLK ML-G10+ was a PVEL Top Performer in 2022, 2023 (LID+LETID, PID).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2016–2026.
RETC — PV Module Index reports 2023–2026.
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, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Sep 2021 – Aug 2026); City of Palmdale (Nov 2023 – Jun 2026); City of Huntington Beach (Mar 2024 – Sep 2026); City of Chula Vista (Apr 2026 – Sep 2026); San Diego County (Feb 2025 – Apr 2025); LADBS, City of Los Angeles (May 2022); LADBS, City of Los Angeles (Nov 2025). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).

Qcells Q.PEAK DUO BLK ML-G10+ 400

Power classes

Build & dimensions

Heat & cold behaviour

At normal operating conditions (NMOT, 800 W/m²) — datasheet

Away from lab conditions — CEC listing test points

Electrical & strength ratings

Certifications

Warranty & degradation

Independent reliability testing

PVEL Top Performer tests

Tested bill of materials

RETC PV Module Index — Qcells

Inverter compatibility & string sizing

String inverters most named in SoCal permits

Microinverters (one per panel)

Expected production in Southern California

Who installs Q.PEAK DUO BLK ML-G10+ panels in SoCal

Permits over time

Power class named in permit

Top ZIP codes

Typical system

Installed together with

Microinverters

Inverters

Optimizers

Batteries

Other versions of this panel

Compare with similar 400 W panels

About Qcells

Other series by SoCal permits

Questions & answers

Sources