Illustration · 132 half-cut cells

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. Power classes 380–410 W in the CEC list.

CEC listed · Aug 2, 2021UL 61730PVEL Top Performer 2022, 2023Installed in 8 SoCal permits

Power class

Power (STC)400 WCEC nameplate
Efficiency≈20.8%calculated from area
%/°C Pmax−0.362CEC listing test
PTC / STC92.9%PTC 372 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 7 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	≈19.8%	352 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 385	385 W	45.19	11.04	36.36	10.59	≈20.1%	357 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 390	390 W	45.23	11.07	36.62	10.65	≈20.3%	362 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 395	395 W	45.27	11.10	36.88	10.71	≈20.6%	367 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 400	400 W	45.30	11.14	37.13	10.77	≈20.8%	372 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 405	405 W	45.34	11.17	37.39	10.83	≈21.1%	376 W	Aug 2, 2021
Q.PEAK DUO BLK ML-G10 410	410 W	45.37	11.20	37.64	10.89	≈21.4%	381 W	Aug 2, 2021

≈ efficiency = Pmax ÷ CEC-listed area 1.92 m².

CEC note: Formerly listed under Hanwha Q CELLS

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area1.92 m² (20.7 ft²)CEC-listed area
Cells132 half-cut cells
Back coverBlack backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.362 %/°C
Voc coefficient β	−0.270 %/°C
Isc coefficient α	+0.041 %/°C
Operating cell temperature	NOCT 45.7 °C

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

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	302.8 W	35.68 V × 8.49 A	79 W	96%

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

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2022, 2023

PVEL Top Performer

this series

2

Tests passed as Top Performer

LID+LETID, PID

11

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

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · NLR PVWatts v8 · 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

29.8 V

Vmp when hot

per panel

12

Max panels / string

max DC 600 V

3

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. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

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	3–12
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 / 29.8 V	✓ Within range	1.38
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	48.1 / 29.8 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 / 29.8 V	✓ Within range	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	48.1 / 29.8 V	⚠ Works; below MPPT at peak heat	1.23
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	48.1 / 29.8 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

8

Permits naming this series

Oct 2021 – Mar 2026

1

Licensed installers

CSLB license on the permit

2

Jurisdictions so far

LA County (unincorp.) (5), Palmdale (3)

SW

South West Builders

Simi Valley · CSLB #1012298

1 installMar 2026Palmdale

Permits over time

Power class named in permit

400 W

4

410 W

3

395 W

1

Typical system

median 7 kW, 17 panels (n = 8)

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.

Installed together with

building permits

Microinverters

Enphase IQ8HC

3

Enphase IQ8M

2

Batteries

Enphase IQ Battery 5P

2

Number of permits naming both this panel series and the product; 8 of 8 permits list other equipment.

Other versions of this panel

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

Qcells Q.PEAK DUO ML-G10

Color version · 380–415 W · listed 2021

Qcells Q.PEAK DUO ML-G10+

Color version · 380–415 W · listed 2021 · 8 SoCal permits

Qcells Q.PEAK DUO BLK ML-G10.D+

Same product line · 395–415 W · listed 2026

Qcells Q.PEAK DUO BLK ML-G10.C+

Same product line · 395–415 W · listed 2025 · 124 SoCal permits

Qcells Q.PEAK DUO BLK ML-G10+

Same product line · 380–415 W · listed 2024 · 221 SoCal permits

Qcells Q.PEAK DUO BLK ML-G10.a+

Same product line · 380–410 W · listed 2021 · 9 SoCal permits

Qcells Q.PEAK DUO ML-G10.a+

Same product line · 380–415 W · listed 2021 · 1 SoCal permits

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	≈20.8%	−0.362	45.3	11.14	product 2022, 2023	8
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+ · 221Q.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+ · 20

Questions & answers

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

Calculated from the panel area (1.92 m²): about 20.8% for the 400 W class. 400 W over 1.92 m² equals about 208 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 = −0.362 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.8% 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 3–12 panels per string (Voc at 2 °C = 48.1 V, Vmp at 74 °C cell = 29.8 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 29.8 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

Has this panel been reliability-tested?

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

Who installs it in Southern California?

Building permits name this series 8 times (Oct 2021 – Mar 2026). The most active licensed installers are South West Builders.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
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) (Oct 2021 – Nov 2022); City of Palmdale (Dec 2025 – Mar 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.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).