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Illustration · 108 cells
Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN450N-108MH-BB

108 cells. Power classes 405–455 W in the CEC list.

CEC listed · Dec 11, 2023UL 61730Installed in 3 SoCal permits
Power class
  • Power (STC)450 WCEC nameplate
  • Efficiency≈23.0%calculated from area
  • %/°C Pmax−0.300CEC listing test
  • PTC / STC94.6%PTC 426 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 11 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
VSUN405N-108MH-BB405 W37.6813.8331.0213.07≈20.8%381 WDec 11, 2023
VSUN410N-108MH-BB410 W37.7513.9131.1413.17≈21.0%386 WDec 11, 2023
VSUN415N-108MH-BB415 W37.9213.9931.3313.24≈21.3%391 WDec 11, 2023
VSUN420N-108MH-BB420 W38.2713.6532.3812.97≈21.5%396 WDec 11, 2023
VSUN425N-108MH-BB425 W38.5613.7032.6413.02≈21.8%401 WDec 11, 2023
VSUN430N-108MH-BB430 W38.8413.7532.8813.08≈22.0%406 WDec 11, 2023
VSUN435N-108MH-BB435 W39.1213.8033.1313.13≈22.3%411 WJul 1, 2025
VSUN440N-108MH-BB440 W39.3813.8533.3713.18≈22.5%416 WJul 1, 2025
VSUN445N-108MH-BB445 W39.6413.9033.6113.24≈22.8%421 WJul 1, 2025
VSUN450N-108MH-BB450 W39.9213.9633.8713.29≈23.0%426 WJul 1, 2025
VSUN455N-108MH-BB455 W40.1614.0234.0913.35≈23.3%430 WJul 1, 2025
≈ efficiency = Pmax ÷ CEC-listed area 1.95 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−0.300 %/°C
Voc coefficient β−0.235 %/°C
Isc coefficient α+0.032 %/°C
Operating cell temperatureNOCT 44.9 °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
405 W305.1 W30.99 V × 9.85 A77.8 W96%
410 W308.6 W31.11 V × 9.92 A78.7 W96%
415 W312.2 W31.29 V × 9.97 A79.6 W96%
420 W317.4 W30.96 V × 10.25 A80.8 W96%
425 W321.2 W31.21 V × 10.29 A81.8 W96%
430 W325 W31.44 V × 10.34 A82.8 W96%
435 W328.8 W31.68 V × 10.38 A83.7 W96%
440 W332.4 W31.91 V × 10.42 A84.6 W96%
445 W336.3 W32.14 V × 10.46 A85.6 W96%
450 W340.2 W32.39 V × 10.5 A86.6 W96%
455 W344 W32.6 V × 10.55 A87.6 W96%
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)
42.1 V
Voc when cold
per panel
28.3 V
Vmp when hot
per panel
14
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

InverterMax DC inputMPPTWindow sourcePanels per string
Tesla 1538000-xx-y600 V60–480 Vdatasheet3–14
Solis (Ginlong) S6-EH1P10K-H-US600 V80–520 Vdatasheet3–14
Solis (Ginlong) Solis-1P7.6K-4G-US600 V100–500 Vdatasheet4–14
Qcells Q.VOLT H7.6SX498 V234–498 VCEC test window9–11

Microinverters (one per panel)

MicroinverterRecommended module powerMax DC inputMPPTVoc cold / Vmp hotCheckDC/AC
Enphase IQ8X-80-M-US320–540 W79.5 V43–60 V42.1 / 28.3 V✗ Not a match: module voltage below MPPT range1.18
APsystems (Alt Power System) DS3-L265–570 W60 V28–45 V42.1 / 28.3 V✓ Within range0.58
Enphase IQ8M-72-2-US260–460 W60 V30–45 V42.1 / 28.3 V⚠ Works; below MPPT at peak heat1.38
Enphase IQ8A-72-2-US295–500 W60 V32–45 V42.1 / 28.3 V⚠ Works; below MPPT at peak heat1.29
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 Angeles1,67675412,0676.08
Palmdale1,83582613,2126.69
Chula Vista1,69676312,2116.11
Huntington Beach1,64373911,8305.89
Riverside1,69676312,2116.21
Santa Clarita1,72477612,4136.28
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.

Who installs VSUNxxxN-108MH-BB panels in SoCal

building permits · CSLB License Master
3
Permits naming this series
Sep 2025 – Oct 2025
1
Licensed installers
CSLB license on the permit
1
Jurisdictions so far
Palmdale (3)
ES
Enpower Star LLC
Chatsworth · CSLB #1112396
3 installsSep 2025 – Oct 2025Palmdale
Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Counts grow as more permit portals are loaded.

Installed together with

building permits

Batteries

Tesla Powerwall 3
3
Number of permits naming both this panel series and the product; 3 of 3 permits list other equipment.

Compare with similar 450 W panels

CEC PV Module List (Oct 7, 2026) · datasheets · Kiwa PVEL Scorecard · building permits
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)SoCal permits (series)
VSUN (Vietnam Sunergy) VSUN450N-108MH-BB450 W≈23%−0.30039.9213.96brand 6×3
Qcells Q.TRON BLK M-G2+ 445445 W≈22.8%−0.27640.1613.98brand 11× (2016–2026)40
Hyundai Energy Solutions HiN-T450NF(BK)450 W≈23.2%−0.29839.214.53brand 5× (2017–2025)37
REC Group REC450AA Pure-RX450 W≈22.3%−0.24865.18.81brand 9× (2016–2025)33
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-144MH · 1VSUNxxx-108BMH · 1VSUNxxx-108M-BB · 1VSUNxxxN-108BMHVSUNxxxN-108BMH-BT

Questions & answers

How efficient is the VSUN (Vietnam Sunergy) VSUN450N-108MH-BB?

Calculated from the panel area (1.95 m²): about 23% for the 450 W class. 450 W over 1.95 m² equals about 230 W per square meter.

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

PVWatts v8 with typical-year weather gives about 754 kWh per year per 450 W panel in Los Angeles and about 826 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.300 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.6% 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 3–14 panels per string (Voc at 2 °C = 42.1 V, Vmp at 74 °C cell = 28.3 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 42.1 V vs max input 60 V; Vmp when hot 28.3 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

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.

Who installs it in Southern California?

Building permits name this series 3 times (Sep 2025 – Oct 2025). The most active licensed installers are Enpower Star LLC.

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Qcells — manufacturer datasheet “Q.TRON BLK M-G2+ SERIES 415–440 Wp”.
  3. Hyundai Energy Solutions — datasheet [US] NF(BK)(HiN) Series (N TOPCon Bifacial) 435~445W.
  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 inverter library (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 — City of Palmdale (Sep 2025 – Oct 2025). Equipment matched from permit descriptions by model number.
  10. Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
  11. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).