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Illustration · 156 half-cut cells
Solar panelQcells

Qcells Q.PEAK DUO XL-G10.d/BFG 480

156 half-cut cells, bifacial. Power classes 460–500 W in the CEC list.

CEC listed · Jul 21, 2021UL 61730Bifacial
Power class
  • Power (STC)480 WCEC nameplate
  • Efficiency≈21.6%calculated from area
  • %/°C Pmax−0.339CEC listing test
  • PTC / STC93.6%PTC 450 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 9 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
Q.PEAK DUO XL-G10.d/BFG 460460 W52.4410.9544.1110.43≈20.7%430 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 465465 W52.6811.0044.4210.47≈20.9%435 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 470470 W52.9111.0444.7310.51≈21.2%440 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 475475 W53.1511.0845.0310.55≈21.4%445 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 480480 W53.3911.1245.3310.59≈21.6%450 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 485485 W53.6311.1645.6310.63≈21.8%454 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 490490 W53.8611.2045.9310.67≈22.1%459 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 495495 W54.1011.2446.2210.71≈22.3%464 WJul 21, 2021
Q.PEAK DUO XL-G10.d/BFG 500500 W54.3411.2846.5110.75≈22.5%469 WJul 21, 2021
≈ efficiency = Pmax ÷ CEC-listed area 2.22 m².
CEC note: Formerly listed under Hanwha Q CELLS

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.339 %/°C
Voc coefficient β−0.268 %/°C
Isc coefficient α+0.058 %/°C
Operating cell temperatureNOCT 45 °C
Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

ClassPmax at NOCTVmp × Imp at NOCTPmax at 200 W/m²Low-light efficiency vs STC
460 W340.7 W40.68 V × 8.37 A89.4 W97%
465 W344.4 W40.97 V × 8.41 A90.4 W97%
470 W348.1 W41.25 V × 8.44 A91.4 W97%
475 W351.8 W41.53 V × 8.47 A92.4 W97%
480 W355.4 W41.81 V × 8.5 A93.3 W97%
485 W359.1 W42.08 V × 8.53 A94.3 W97%
490 W362.9 W42.36 V × 8.57 A95.3 W97%
495 W366.5 W42.63 V × 8.6 A96.2 W97%
500 W370.2 W42.89 V × 8.63 A97.2 W97%
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
2023
PVEL Top Performer
closely related product name
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

YearProductTests
2023Q.PEAK DUO XL-G10.d (closely related product name)LID+LETIDPID

Tested bill of materials

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

RETC PV Module Index — Qcells

YearRecognition
2023Overall Highest Achiever; High Achievement in Performance (Module efficiency, Pan file performance); High Achievement in Reliability (Damp heat test, Pid resistance, Thermal cycle test)
2024High Achievement in Performance
2025Performance High Achiever
2026Overall 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)
56.7 V
Voc when cold
per panel
36.5 V
Vmp when hot
per panel
10
Max panels / string
max DC 600 V
2
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

InverterMax DC inputMPPTWindow sourcePanels per string
Tesla 1538000-xx-y600 V60–480 Vdatasheet2–10
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–10
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet3–10
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window7–8

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V56.7 / 36.5 V⚠ Works; below MPPT at peak heat1.26
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V56.7 / 36.5 V✓ Within range0.62
Enphase IQ8A-72-2-US295–500 W60 V32–45 V56.7 / 36.5 V✓ Within range1.38
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
CitykWh / kW / yrkWh / panel / yrkWh / system / yrSun, kWh/m²/day
Los Angeles1,67680412,0676.08
Palmdale1,83588113,2126.69
Chula Vista1,69681412,2116.11
Huntington Beach1,64378911,8305.89
Riverside1,69681412,2116.21
Santa Clarita1,72482812,4136.28
788Jan788Feb1,012Mar1,117Apr1,104May1,173Jun1,236Jul1,250Aug1,093Sep964Oct829Nov717DeckWh per month · Los Angeles
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 480 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · SEG Solar datasheet · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
Qcells Q.PEAK DUO XL-G10.d/BFG 480480 W≈21.6%−0.33953.3911.12brand 11×—
REC Group REC475AA Pure-RX475 W≈23.5%−0.24865.79brand 9× (2016–2025)33
SEG Solar SEG-495-BTD-BG495 W≈25.3%−0.29039.915.82product 2023, 2024, 2025, 20268
Elin Energy (Sirius PV) ELNSM60M-HC-475475 W≈22.1%−0.33241.8214.26—2
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

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.d/BFG 480?

Calculated from the panel area (2.22 m²): about 21.6% for the 480 W class. 480 W over 2.22 m² equals about 216 W per square meter.

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

PVWatts v8 with typical-year weather gives about 804 kWh per year per 480 W panel in Los Angeles and about 881 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.339 %/°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 = 56.7 V, Vmp at 74 °C cell = 36.5 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 56.7 V vs max input 60 V; Vmp when hot 36.5 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

Is it bifacial?

Yes. Rear gain depends on mounting height and ground reflectance.

Has this panel been reliability-tested?

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

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. SEG Solar — manufacturer datasheet “XXXTFHTPMBSDPN YUKON/Series )BMG$FMM/5ZQF501$PO”.
  3. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2016–2026.
  4. RETC — PV Module Index reports 2023–2026.
  5. NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (version 2026.7.3).
  6. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  7. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  8. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  9. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).