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)
48.1 V
Voc when cold
per panel
29.3 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 / 29.3 V
✓ Within range
1.31
Enphase IQ8X-80-M-US
320–540 W
79.5 V
43–60 V
48.1 / 29.3 V
✗ Not a match: module voltage below MPPT range
1
APsystems (Alt Power System) DS3-L
265–570 W
60 V
28–45 V
48.1 / 29.3 V
✓ Within range
0.49
Enphase IQ8M-72-2-US
260–460 W
60 V
30–45 V
48.1 / 29.3 V
⚠ Works; below MPPT at peak heat
1.17
Enphase IQ8A-72-2-US
295–500 W
60 V
32–45 V
48.1 / 29.3 V
⚠ Works; below MPPT at peak heat
1.09
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
City
kWh / kW / yr
kWh / panel / yr
kWh / system / yr
Sun, kWh/m²/day
Los Angeles
1,676
637
11,464
6.08
Palmdale
1,835
697
12,551
6.69
Chula Vista
1,696
644
11,601
6.11
Huntington Beach
1,643
624
11,238
5.89
Riverside
1,696
644
11,601
6.21
Santa Clarita
1,724
655
11,792
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-G9 panels in SoCal
building permits
4
Permits naming this series
Jun 2021 – Jan 2022
1
Jurisdictions so far
LA County (unincorp.) (4)
Permits over time
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
Inverters
SolarEdge SE…H (HD-Wave)
2
Optimizers
SolarEdge Power Optimizer
2
Number of permits naming both this panel series and the product; 4 of 4 permits list other equipment.
Other versions of this panel
CEC PV Module List (Oct 7, 2026) · building permits
Qcells Q.PEAK DUO ML-G9
Color version · 355–400 W · listed 2020
Qcells Q.PEAK DUO ML-G9+
Color version · 355–400 W · listed 2020 · 1 SoCal permits
Qcells Q.PEAK DUO BLK ML-G9+
Same product line · 355–390 W · listed 2020 · 11 SoCal permits
Compare with similar 380 W panels
CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · Canadian Solar datasheet · building permits
Panel
Pmax
Efficiency
γ Pmax (CEC)
Voc, V
Isc, A
PVEL (product / brand)
SoCal permits (series)
Qcells Q.PEAK DUO BLK ML-G9 380
380 W
≈20.9%
−0.364
44.99
10.65
product 2021, 2022
4
JA Solar JAM54S31-385/MR
385 W
≈20.3%
−0.329
36.71
13.52
product 2023, 2024
152
REC Group REC380AA Pure
380 W
≈21.2%
−0.256
48.4
10.17
brand 9× (2016–2025)
66
Canadian Solar CS6R-380MS-HL {Blk}
380 W
≥19.5%
−0.328
36
13.55
product 2024
46
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
How efficient is the Qcells Q.PEAK DUO BLK ML-G9 380?
Calculated from the panel area (1.82 m²): about 20.9% for the 380 W class. 380 W over 1.82 m² equals about 209 W per square meter.
How much energy does one panel produce in Los Angeles or Palmdale?
PVWatts v8 with typical-year weather gives about 637 kWh per year per 380 W panel in Los Angeles and about 697 kWh in Palmdale (20° roof, facing south, 14% system losses).
How much power does it lose on a hot roof?
With γ = −0.364 %/°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 = 29.3 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 29.3 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-G9+ was a PVEL Top Performer in 2021, 2022 (DH, LID+LETID, MSS, PID, TC).
Sources
California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 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) (Jun 2021 – Jan 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).
Get your free estimate
Three fields, and Cali Energy calls back within 30 minutes during business hours.
Thanks!
We got your request and will call back within 30 minutes during business hours.
