Illustration · 132 half-cut cells (6 × 22)

Solar panelQcells

Qcells Q.PEAK DUO BLK ML-G10+/t 395

Name: Qcells Q.PEAK DUO BLK ML-G10+/t 395
Brand: Qcells

132 half-cut cells (6 × 22). Power classes 395–400 W in the CEC list.

CEC listed · Apr 3, 2023UL 6173025-yr product + 25-yr performance warrantyInstalled in 12 SoCal permits

Power class

Power (STC)395 WCEC nameplate
Efficiency≈20.6%calculated from area
%/°C Pmax−0.34CEC test: −0.374
Degradation / yr0.5%after year 1 (warranty)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 2 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Q.PEAK DUO BLK ML-G10+/t 395	395 W	45.52	11.04	37.81	1.45	≈20.6%	362 W	Dec 2, 2024
Q.PEAK DUO BLK ML-G10+/t 400	400 W	45.55	11.07	38.09	10.50	≈20.8%	367 W	Apr 3, 2023

≈ 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) · Qcells datasheet

Module area1.92 m² (20.7 ft²)CEC-listed area
Weight48.5 lb (22 kg)
Cells132 half-cut cells (6 × 22)
Front glass0.13 in (3.2 mm) thermally pre-stressed glass
Back coverTransparent composite film with black grid
FrameBlack anodised aluminium
Junction box2.09–3.98 in × 1.26–2.36 in × 0.59–0.71 in
Cable / connector4 mm² Solar cable; (+) ≥ 72.04 in (1830 mm), (-) ≥ 72.04 in (1830 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	−0.374 %/°C
Voc coefficient β	−0.27 %/°C	−0.281 %/°C
Isc coefficient α	+0.04 %/°C	+0.041 %/°C
Vmp coefficient	≈ −0.38 %/°C	—
Operating cell temperature	—	NOCT 48.1 °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
395 W	296.3	42.93	8.89	36.10	8.21
400 W	300.1	42.96	8.92	36.33	8.26

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
395 W	38.8 W	34.06 V × 1.14 A	—	—
400 W	283.1 W	34.31 V × 8.25 A	74.7 W	93%

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

Straight line from 100% to the end-of-warranty value — linear, per datasheet.

Product warranty25 years
Performance warranty25 years, linear
Then≤ 0.5% / year
Year 25≥ 86%

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2022, 2023

PVEL Top Performer

closely related product name

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+ (closely related product name)	LID+LETIDPID
2023	Q.PEAK DUO BLK ML-G10+ (closely related product name)	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

48.3 V

Voc when cold

per panel

30.8 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	48.3 / 30.8 V	✓ Within range	1.36
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	48.3 / 30.8 V	✗ Not a match: module voltage below MPPT range	1.04
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	48.3 / 30.8 V	✓ Within range	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	48.3 / 30.8 V	✓ Within range	1.22
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	48.3 / 30.8 V	⚠ Works; below MPPT at peak heat	1.13

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	662	11,916	6.08
Palmdale	1,835	725	13,047	6.69
Chula Vista	1,696	670	12,059	6.11
Huntington Beach	1,643	649	11,682	5.89
Riverside	1,696	670	12,059	6.21
Santa Clarita	1,724	681	12,258	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+/t panels in SoCal

building permits · CSLB License Master

Permits naming this series

Apr 2024 – Sep 2025

Licensed installers

CSLB license on the permit

Jurisdictions so far

Palmdale (7), LA County (unincorp.) (5)

Dutchmen Construction Incorporated

Hemet · CSLB #1070131

1 installSep 2025Palmdale

Permits over time

Power class named in permit

395 W

400 W

Top ZIP codes

ZIP 935524
ZIP 905023
ZIP 935502
Other ZIP codes3

Typical system

median 5.9 kW, 15 panels (n = 10)

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 IQ8+

Batteries

Enphase IQ Battery 5P

Number of permits naming both this panel series and the product; 12 of 12 permits list other equipment.

Compare with similar 395 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+/t 395	395 W	≈20.6%	−0.374	45.52	11.04	brand 11×	12
JA Solar JAM54S31-395/MR	395 W	≈20.8%	−0.329	36.98	13.7	product 2023, 2024	152
REC Group REC395AA Pure	395 W	≈22%	−0.256	48.7	10.2	brand 9× (2016–2025)	66
LONGi LR5-54HABB-395M	395 W	≈20.8%	−0.342	36.81	13.65	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+/t 395?

Calculated from the panel area (1.92 m²): about 20.6% for the 395 W class. 395 W over 1.92 m² equals about 206 W per square meter.

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

PVWatts v8 with typical-year weather gives about 662 kWh per year per 395 W panel in Los Angeles and about 725 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 = 48.3 V, Vmp at 74 °C cell = 30.8 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 48.3 V vs max input 60 V; Vmp when hot 30.8 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 86% after 25 years (manufacturer datasheet).

Has this panel been reliability-tested?

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

What fire rating does it have?

UL 61730 fire rating Type 2 per datasheet.

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+ SERIES 390–410 Wp”.
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 — City of Palmdale (Apr 2024 – Sep 2025); Los Angeles County Public Works (EPIC-LA, unincorporated areas) (May 2024 – Jun 2024). 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).