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Illustration · 156 cells
Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN625N-156BMH-DG

156 cells. Power classes 610–640 W in the CEC list.

CEC listed · Aug 21, 2024UL 61730PVEL Top Performer 2024
Power class
  • Power (STC)625 WCEC nameplate
  • Efficiency≈22.3%calculated from area
  • %/°C Pmax−0.301CEC listing test
  • PTC / STC94.3%PTC 589 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 7 models
ModelPmaxVoc, VIsc, AVmp, VImp, AEfficiencyPTCCEC listed
VSUN610N-156BMH-DG610 W55.8113.6047.1112.95≈21.8%575 WAug 21, 2024
VSUN615N-156BMH-DG615 W56.0213.6547.3113.00≈22.0%579 WAug 21, 2024
VSUN620N-156BMH-DG620 W56.1813.7147.4813.06≈22.1%584 WAug 21, 2024
VSUN625N-156BMH-DG625 W56.3813.7647.6813.11≈22.3%589 WAug 21, 2024
VSUN630N-156BMH-DG630 W56.5613.8247.8913.16≈22.5%594 WAug 21, 2024
VSUN635N-156BMH-DG635 W56.7613.8748.0513.22≈22.7%599 WAug 21, 2024
VSUN640N-156BMH-DG640 W56.9213.9348.2413.27≈22.9%604 WAug 21, 2024
≈ efficiency = Pmax ÷ CEC-listed area 2.8 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−0.301 %/°C
Voc coefficient β−0.237 %/°C
Isc coefficient α+0.057 %/°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
610 W462.2 W44.63 V × 10.36 A119.1 W98%
615 W465.9 W44.82 V × 10.39 A120.1 W98%
620 W469.7 W44.98 V × 10.44 A121.1 W98%
625 W473.5 W45.17 V × 10.48 A122 W98%
630 W477.4 W45.37 V × 10.52 A123 W98%
635 W481.2 W45.52 V × 10.57 A124 W98%
640 W484.9 W45.7 V × 10.61 A125 W98%
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
2024
PVEL Top Performer
this series
3
Tests passed as Top Performer
DH, LID+LETID, PID
6
PVEL Scorecards
VSUN (Vietnam Sunergy) named Top Performer, 2021–2026
2025, 2026
RETC Overall Highest Achiever
VSUN (Vietnam Sunergy), manufacturer level

PVEL Top Performer tests

YearProductTests
2024VSUNxxxN-156BMH-DGDHLID+LETIDPID

Tested bill of materials

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

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)
59.4 V
Voc when cold
per panel
39.3 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 window6–8

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 Angeles1,6761,04811,5226.08
Palmdale1,8351,14712,6166.69
Chula Vista1,6961,06011,6606.11
Huntington Beach1,6431,02711,2965.89
Riverside1,6961,06011,6606.21
Santa Clarita1,7241,07811,8526.28
752Jan753Feb966Mar1,067Apr1,054May1,120Jun1,180Jul1,194Aug1,044Sep921Oct791Nov685DeckWh 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 625 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · datasheets
PanelPmaxEfficiencyγ Pmax (CEC)Voc, VIsc, APVEL (product / brand)
VSUN (Vietnam Sunergy) VSUN625N-156BMH-DG625 W≈22.3%−0.30156.3813.76product 2024
Canadian Solar CS7N-630MB-AG630 W≈20.5%−0.39044.218.23product 2024
Hyundai Energy Solutions HiS-T625NJ625 W≈22.6%−0.29457.1513.82brand 5× (2017–2025)
JinkoSolar JKM625N-66HL4M-BDV625 W≈23.1%−0.29949.2816.14product 2025
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) VSUN625N-156BMH-DG?

Calculated from the panel area (2.8 m²): about 22.3% for the 625 W class. 625 W over 2.8 m² equals about 223 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,048 kWh per year per 625 W panel in Los Angeles and about 1,147 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.301 %/°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 2–10 panels per string (Voc at 2 °C = 59.4 V, Vmp at 74 °C cell = 39.3 V). Final design must follow the inverter manual and NEC 690.7.

Has this panel been reliability-tested?

VSUNxxxN-156BMH-DG was a PVEL Top Performer in 2024 (DH, LID+LETID, PID).

Sources

  1. California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
  2. Hyundai Energy Solutions — datasheet [US] NJ(HiS) Series (N TOPCon Bifacial) 635~645W.
  3. JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR PRODUCT.
  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 — 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).