39.4″ · 1,000 mm wide · 1.38″ (35 mm) frame · 51.8 lb (23.5 kg)

Solar panelQcells

Qcells Q.PEAK DUO L-G7.2 400

Name: Qcells Q.PEAK DUO L-G7.2 400
Brand: Qcells

144 half-cut cells (6 × 24). Power classes 385–415 W in the CEC list; datasheet covers 385–405 W.

CEC listed · Jan 13, 2020UL 61730, UL 170312-yr product + 25-yr performance warrantyMade in ChinaSeen in 1 SoCal permit

Power class

Power (STC)400 WCEC nameplate
Efficiency≥19.9%datasheet minimum
%/°C Pmax−0.35CEC test: −0.346
Degradation / yr0.54%after year 1 (warranty)

Power classes

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

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Q.PEAK DUO L-G7.2 385	385 W	48.17	10.05	40.24	9.57	≥19.1%	358 W	Jan 13, 2020
Q.PEAK DUO L-G7.2 390	390 W	48.44	10.10	40.57	9.61	≥19.4%	363 W	Jan 13, 2020
Q.PEAK DUO L-G7.2 395	395 W	48.70	10.14	40.90	9.66	≥19.6%	368 W	Jan 13, 2020
Q.PEAK DUO L-G7.2 400	400 W	48.96	10.19	41.23	9.70	≥19.9%	373 W	Jan 13, 2020
Q.PEAK DUO L-G7.2 405	405 W	49.22	10.23	41.56	9.75	≥20.1%	378 W	Jan 13, 2020
Q.PEAK DUO L-G7.2 410	410 W	49.48	10.28	41.88	9.79	≈20.3%	382 W	Sep 1, 2020
Q.PEAK DUO L-G7.2 415	415 W	49.74	10.32	42.20	9.83	≈20.6%	387 W	Sep 1, 2020

≈ efficiency = Pmax ÷ panel area 2.015 m² (datasheet size) for classes outside the datasheet.

CEC note: Formerly listed under Hanwha Q CELLS

Build & dimensions

Qcells datasheet · Cali-Graf calculation

Dimensions79.3 × 39.4 × 1.38 in2,015 × 1,000 × 35 mm
Module area2.02 m² (21.7 ft²)length × width
Weight51.8 lb (23.5 kg)
Cells144 half-cut cells (6 × 24)
Front glass3.2 mm thermally pre-stressed glass with
Back coverComposite film
FrameAnodised aluminium
Junction box53–101 mm × 32–60 mm × 15–18 mm
Cable / connector4 mm² Solar cable; (+) ≥ 1350 mm, (-) ≥ 1350 mm · Stäubli MC4-Evo2: IP68
Made inMade in China

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.35 %/°C	−0.346 %/°C
Voc coefficient β	−0.27 %/°C	−0.270 %/°C
Isc coefficient α	+0.04 %/°C	+0.034 %/°C
Vmp coefficient	≈ −0.39 %/°C	—
Operating cell temperature	NMOT 43 ± 3 °C	NOCT 45.6 °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	288.3	45.42	8.10	38.29	7.53
390 W	292.1	45.67	8.14	38.60	7.57
395 W	295.8	45.92	8.17	38.92	7.60
400 W	299.6	46.17	8.21	39.23	7.64
405 W	303.3	46.41	8.24	39.54	7.67

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
385 W	280.4 W	37.1 V × 7.56 A	71.4 W	93%
390 W	283.8 W	37.41 V × 7.59 A	72.3 W	93%
395 W	287.6 W	37.71 V × 7.63 A	73.3 W	93%
400 W	291.2 W	38.02 V × 7.66 A	74.1 W	93%
405 W	295 W	38.32 V × 7.7 A	75.1 W	93%
410 W	298.5 W	38.62 V × 7.73 A	76 W	93%
415 W	302 W	38.91 V × 7.76 A	76.9 W	93%

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

Electrical & strength ratings

Qcells datasheet

Max system voltage1,500 V (UL)
Max reverse current20 A
Fire rating (UL 61730)Type 1
Design load push / pull75 psf3,600 Pa
Module temperature−40 °F to +185 °F−40 °C to +85 °C

Packaging: 30 per pallet

Certifications

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

UL 61730, UL 1703UL 1703IEC 61215IEC 61730Fire rating Type 1 (UL 61730)

UL 61730, UL 1703CEC listing
UL 1703datasheet
IEC 61215datasheet
IEC 61730datasheet
Fire rating Type 1 (UL 61730)datasheet

Warranty & degradation

Qcells datasheet

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

Product warranty12 years
Performance warranty25 years, linear
Then≤ 0.54% / year
Year 25≥ 85%

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

PVEL Scorecards

Qcells named Top Performer, 2016–2026

2023, 2026

RETC Overall Highest Achiever

Qcells, manufacturer level

This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

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

52 V

Voc when cold

per panel

33.4 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	2–11
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–11
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–9

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	52 / 33.4 V	✓ Within range	1.38
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	52 / 33.4 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	52 / 33.4 V	✓ Within range	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	52 / 33.4 V	✓ Within range	1.23
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	52 / 33.4 V	✓ Within range	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.

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 L-G7.2 400	400 W	≥19.9%	−0.346	48.96	10.19	brand 11×	1
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 L-G7.2 400?

The Qcells datasheet guarantees at least 19.9% module efficiency for the 400 W class (up to 20.1% for 405 W). 400 W over 2.02 m² equals about 199 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 = −0.35 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.1% 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 2–11 panels per string (Voc at 2 °C = 52 V, Vmp at 74 °C cell = 33.4 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 52 V vs max input 60 V; Vmp when hot 33.4 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?

12 years on the product and 25 years linear on performance: at least 85% after 25 years (manufacturer datasheet).

How big and heavy is it?

79.3 × 39.4 × 1.38 in (2,015 × 1,000 × 35 mm), 51.8 lb (23.5 kg).

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Qcells was named a Top Performer in 11 Scorecards (2016–2026). RETC named Qcells Overall Highest Achiever in 2023, 2026.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.PEAK DUO L-G7.2 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 2022). Equipment matched from permit descriptions by model number.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).