Illustration · 156 half-cut cells (6 × 26)

Solar panelQcells

Qcells Q.PEAK DUO XL-G10.2 485

Name: Qcells Q.PEAK DUO XL-G10.2 485
Brand: Qcells

156 half-cut cells (6 × 26). Power classes 460–505 W in the CEC list; datasheet covers 470–495 W.

CEC listed · Jul 1, 2021UL 6173012-yr product + 25-yr performance warrantyPVEL Top Performer 2023Seen in 1 SoCal permit

Power class

Power (STC)485 WCEC nameplate
Efficiency≥20.9%datasheet minimum
%/°C Pmax−0.34CEC test: −0.340
Degradation / yr0.5%after year 1 (warranty)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · Qcells datasheet · 10 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Q.PEAK DUO XL-G10.2 460	460 W	53.48	11.16	43.73	10.52	≈20.7%	428 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 465	465 W	53.51	11.18	44.00	10.57	≈20.9%	433 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 470	470 W	53.54	11.21	44.27	10.62	≥20.3%	438 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 475	475 W	53.58	11.24	44.54	10.66	≥20.5%	442 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 480	480 W	53.61	11.26	44.81	10.71	≥20.7%	447 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 485	485 W	53.64	11.29	45.07	10.76	≥20.9%	452 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 490	490 W	53.68	11.31	45.33	10.81	≥21.2%	457 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 495	495 W	53.71	11.34	45.59	10.86	≥21.4%	462 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 500	500 W	53.75	11.36	45.85	10.91	≈22.5%	466 W	Jul 1, 2021
Q.PEAK DUO XL-G10.2 505	505 W	53.78	11.39	46.10	10.95	≈22.7%	471 W	Jul 1, 2021

≈ efficiency = Pmax ÷ CEC-listed area 2.22 m² for classes outside the datasheet.

CEC note: Formerly listed under Hanwha Q CELLS

Build & dimensions

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

Module area2.22 m² (23.9 ft²)CEC-listed area
Weight58.4 lb (26.5 kg)
Cells156 half-cut cells (6 × 26)
Front glass0.13 in (3.2 mm) thermally pre-stressed glass with
Back coverComposite film
FrameAnodized aluminum
Junction box2.09–3.98 in × 1.26–2.36 in × 0.59–0.71 in
Cable / connector4 mm² Solar cable; (+) ≥ 27.6 in (700 mm), (-) ≥ 13.8 in (350 mm)* · Stäubli MC4, Stäubli MC4-Evo2, Hanwha Q CELLS HQC4; 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	−0.340 %/°C
Voc coefficient β	−0.27 %/°C	−0.264 %/°C
Isc coefficient α	+0.04 %/°C	+0.013 %/°C
Vmp coefficient	≈ −0.38 %/°C	—
Operating cell temperature	NMOT 43 ± 3 °C	NOCT 46.5 °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
470 W	352.6	50.49	9.03	42.26	8.34
475 W	356.4	50.53	9.05	42.49	8.39
480 W	360.1	50.56	9.07	42.72	8.43
485 W	363.9	50.59	9.09	42.94	8.47
490 W	367.6	50.62	9.12	43.17	8.52
495 W	371.4	50.65	9.14	43.39	8.56

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
460 W	338 W	40.53 V × 8.34 A	87.4 W	95%
465 W	341.7 W	40.78 V × 8.38 A	88.4 W	95%
470 W	345.4 W	41.03 V × 8.42 A	89.3 W	95%
475 W	348.8 W	41.28 V × 8.45 A	90.2 W	95%
480 W	352.6 W	41.53 V × 8.49 A	91.2 W	95%
485 W	356.3 W	41.77 V × 8.53 A	92.2 W	95%
490 W	360 W	42.01 V × 8.57 A	93.1 W	95%
495 W	363.8 W	42.25 V × 8.61 A	94.1 W	95%
500 W	367.5 W	42.49 V × 8.65 A	95.1 W	95%
505 W	370.9 W	42.73 V × 8.68 A	95.9 W	95%

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

Electrical & strength ratings

Max system voltage1,500 V (UL)
Max series fuse20 A
Fire rating (UL 61730)Type 1
Protection classClass II
Design load push / pull75 / 42 psf3,600 / 2,000 Pa
Test load push / pull113 / 63 psf5,400 / 3,000 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 1 (UL 61730)

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

Warranty & degradation

Qcells datasheet · Cali-Graf calculation

Product warranty12 years
Performance warranty25 years, linear
Year 1≥ 98%
Then≤ 0.5% / year
Year 10≥ 93.5%calculated from warranty terms
Year 25≥ 86%

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2023

PVEL Top Performer

this series

Tests passed as Top Performer

LID+LETID

PVEL Scorecards

Qcells named Top Performer, 2016–2026

2023, 2026

RETC Overall Highest Achiever

Qcells, manufacturer level

PVEL Top Performer tests

Year	Product	Tests
2023	Q.PEAK DUO XL-G10.2	LID+LETID

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 tested480-525W

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

57 V

Voc when cold

per panel

36.7 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	2–10
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–10
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–10
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–8

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	57 / 36.7 V	⚠ Works; below MPPT at peak heat	1.28
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	57 / 36.7 V	✓ Within range	0.62
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	57 / 36.7 V	✓ Within range	1.39

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	813	11,380	6.08
Palmdale	1,835	890	12,460	6.69
Chula Vista	1,696	823	11,516	6.11
Huntington Beach	1,643	797	11,156	5.89
Riverside	1,696	823	11,516	6.21
Santa Clarita	1,724	836	11,706	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 485 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	SoCal permits (series)
Qcells Q.PEAK DUO XL-G10.2 485	485 W	≥20.9%	−0.340	53.64	11.29	1
SEG Solar SEG-495-BTD-BG	495 W	≈25.3%	−0.290	39.9	15.82	8
AXITEC AC-450MH/144V	450 W	≈21.2%	−0.380	50	11.47	1
La Solar LS450BL	450 W	≈20.5%	−0.352	49.6	11.53	1

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 XL-G10.2 485?

The Qcells datasheet guarantees at least 20.9% module efficiency for the 485 W class (up to 21.4% for 495 W). 485 W over 2.22 m² equals about 218 W per square meter.

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

PVWatts v8 with typical-year weather gives about 813 kWh per year per 485 W panel in Los Angeles and about 890 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 2–10 panels per string (Voc at 2 °C = 57 V, Vmp at 74 °C cell = 36.7 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with APsystems (Alt Power System) DS3-L microinverters?

Voltage check against the APsystems (Alt Power System) datasheet: Voc when cold 57 V vs max input 60 V; Vmp when hot 36.7 V vs MPPT low 28 V; recommended module power 265–570 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 98% of rated power in year 1, then no more than 0.5% per year — at least 86% after 25 years (manufacturer datasheet).

Has this panel been reliability-tested?

Q.PEAK DUO XL-G10.2 was a PVEL Top Performer in 2023 (LID+LETID).

What fire rating does it have?

UL 61730 fire rating Type 1 per datasheet.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.PEAK DUO XL-G10.2 ENDURING HIGH PERFORMANCE”.
SEG Solar — manufacturer datasheet “XXXTFHTPMBSDPN YUKON/Series )BMG$FMM/5ZQF501$PO”.
AXITEC — datasheet AXIworldbipremium bifacial 144 cells asemmbled in US.
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) (Feb 2023). 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).