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Illustration · 156 half-cut cells
Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN480-156BMH

156 half-cut cells, bifacial. Power classes 465–495 W in the CEC list.

CEC listed · Jan 3, 2022UL 61730Bifacial
Power class
  • Power (STC)480 WCEC nameplate
  • Efficiency≈20.1%calculated from area
  • %/°C Pmax−0.347CEC listing test
  • PTC / STC92.9%PTC 446 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 7 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
VSUN465-156BMH465 W52.5011.2243.7010.64≈19.5%432 WJan 3, 2022
VSUN470-156BMH470 W52.7011.2943.9010.71≈19.7%436 WJan 3, 2022
VSUN475-156BMH475 W52.9011.3544.1010.77≈19.9%441 WJan 3, 2022
VSUN480-156BMH480 W53.1011.4244.3010.84≈20.1%446 WJan 3, 2022
VSUN485-156BMH485 W53.3011.4844.5010.90≈20.3%451 WJan 3, 2022
VSUN490-156BMH490 W53.5011.5544.7010.97≈20.5%456 WJan 3, 2022
VSUN495-156BMH495 W53.7011.6244.9011.03≈20.7%460 WJan 3, 2022
≈ efficiency = Pmax ÷ CEC-listed area 2.39 m².

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
CEC listing test
Pmax coefficient γ−0.347 %/°C
Voc coefficient β−0.284 %/°C
Isc coefficient α+0.057 %/°C
Operating cell temperatureNOCT 46.2 °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
465 W352.5 W41.64 V × 8.46 A93.7 W101%
470 W356.4 W41.83 V × 8.52 A94.7 W101%
475 W360.1 W42.02 V × 8.57 A95.7 W101%
480 W364.1 W42.22 V × 8.62 A96.7 W101%
485 W367.7 W42.41 V × 8.67 A97.7 W101%
490 W371.7 W42.6 V × 8.73 A98.8 W101%
495 W375.5 W42.79 V × 8.77 A99.7 W101%
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
6
PVEL Scorecards
VSUN (Vietnam Sunergy) named Top Performer, 2021–2026
2025, 2026
RETC Overall Highest Achiever
VSUN (Vietnam Sunergy), manufacturer level
This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

RETC PV Module Index — VSUN (Vietnam Sunergy)

YearRecognition
2024Test Category High Achiever
2025Overall Highest Achiever
2026Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Lid, PAN file, Temperature coefficient, Iam, Letid); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Damp heat, Pid, Sdml, Tc, Uvid)

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)
56.6 V
Voc when cold
per panel
35.5 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 V56.6 / 35.5 V⚠ Works; below MPPT at peak heat1.26
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V56.6 / 35.5 V✓ Within range0.62
Enphase IQ8A-72-2-US295–500 W60 V32–45 V56.6 / 35.5 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 · datasheets · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
VSUN (Vietnam Sunergy) VSUN480-156BMH480 W≈20.1%−0.34753.111.42brand 6×—
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
Qcells Q.PEAK DUO XL-G10.d 480480 W≥20.7%−0.34053.6111.26product 20236
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 VSUN (Vietnam Sunergy)

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

Other series by SoCal permits

VSUNxxxN-108BMH-BB · 4VSUNxxxN-108MH-BB · 3VSUNxxxN-144MH · 1VSUNxxx-108BMH · 1VSUNxxx-108M-BB · 1VSUNxxxN-108BMH

Questions & answers

How efficient is the VSUN (Vietnam Sunergy) VSUN480-156BMH?

Calculated from the panel area (2.39 m²): about 20.1% for the 480 W class. 480 W over 2.39 m² equals about 201 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 = −0.347 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18% 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 = 56.6 V, Vmp at 74 °C cell = 35.5 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 56.6 V vs max input 60 V; Vmp when hot 35.5 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?

This exact series is not in published PVEL Top Performer tables; VSUN (Vietnam Sunergy) was named a Top Performer in 6 Scorecards (2021–2026). RETC named VSUN (Vietnam Sunergy) Overall Highest Achiever in 2025, 2026.

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. Qcells — manufacturer datasheet “Q.PEAK DUO XL-G10.d ENDURING HIGH PERFORMANCE”.
  4. Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2021–2026.
  5. RETC — PV Module Index reports 2024–2026.
  6. NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (version 2026.7.3).
  7. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
  8. Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
  9. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  10. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).