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Illustration · 132 half-cut cells
Solar panelCW ENERJİ MÜHENDİSLİK TİCARET…

CW ENERJİ MÜHENDİSLİK TİCARET VE SANAYİ ANONİM ŞİRKETİ CWT660-132PMB12

132 half-cut cells, PERC, bifacial, glass (dual-glass module). Power classes 650–675 W in the CEC list.

CEC listed · Jan 22, 2024UL 61730Bifacial
Power class
  • Power (STC)660 WCEC nameplate
  • Efficiency≈21.2%calculated from area
  • %/°C Pmax−0.325CEC listing test
  • PTC / STC93.7%PTC 618 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 6 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
CWT650-132PMB12650 W45.2018.3537.5017.34≈20.9%609 WJan 22, 2024
CWT655-132PMB12655 W45.4018.3937.7017.38≈21.1%614 WJan 22, 2024
CWT660-132PMB12660 W45.6018.4437.9017.42≈21.2%618 WJan 22, 2024
CWT665-132PMB12665 W45.8018.4838.1017.46≈21.4%623 WJan 22, 2024
CWT670-132PMB12670 W46.0018.5138.3017.50≈21.5%628 WJan 22, 2024
CWT675-132PMB12675 W46.2018.5638.5017.54≈21.7%633 WJan 22, 2024
≈ efficiency = Pmax ÷ CEC-listed area 3.11 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.325 %/°C
Voc coefficient β−0.247 %/°C
Isc coefficient α+0.039 %/°C
Operating cell temperatureNOCT 45.6 °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
650 W478.7 W35.33 V × 13.55 A124.8 W96%
655 W482.4 W35.51 V × 13.58 A125.7 W96%
660 W486.1 W35.7 V × 13.61 A126.7 W96%
665 W489.7 W35.89 V × 13.65 A127.6 W96%
670 W493.4 W36.08 V × 13.68 A128.6 W96%
675 W497.2 W36.27 V × 13.71 A129.6 W96%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Certifications

CEC PV Module List (Oct 7, 2026)
UL 61730IEC 61215

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)
48.2 V
Voc when cold
per panel
31.1 V
Vmp when hot
per panel
12
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 Vdatasheet2–12
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–12
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet4–12
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window8–10

Microinverters (one per panel)

No microinverter in the reference set lists this power class in its recommended module power range.
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 Angeles1,6761,10612,1686.08
Palmdale1,8351,21113,3226.69
Chula Vista1,6961,11912,3136.11
Huntington Beach1,6431,08411,9285.89
Riverside1,6961,11912,3136.21
Santa Clarita1,7241,13812,5166.28
794Jan795Feb1,020Mar1,127Apr1,113May1,183Jun1,246Jul1,260Aug1,102Sep972Oct836Nov723DeckWh 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.

Questions & answers

How efficient is the CW ENERJİ MÜHENDİSLİK TİCARET VE SANAYİ ANONİM ŞİRKETİ CWT660-132PMB12?

Calculated from the panel area (3.11 m²): about 21.2% for the 660 W class. 660 W over 3.11 m² equals about 212 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,106 kWh per year per 660 W panel in Los Angeles and about 1,211 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.325 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16.8% 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 2–12 panels per string (Voc at 2 °C = 48.2 V, Vmp at 74 °C cell = 31.1 V). Final design must follow the inverter manual and NEC 690.7.

Is it bifacial?

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

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (version 2026.7.3).
  3. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  4. Inverter datasheets — Solis (Ginlong), Tesla (manufacturer documents).
  5. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).