Illustration · 120 half-cut cells (12 × 10)

Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN370-120BMH

Name: VSUN (Vietnam Sunergy) VSUN370-120BMH
Brand: VSUN (Vietnam Sunergy)

120 half-cut cells (12 × 10), PERC, bifacial, transparent mesh. Power classes 365–470 W in the CEC list; datasheet covers 355–370 W.

CEC listed · May 11, 2022UL 61730Bifacial · 70 ± 5%PVEL Top Performer 2023, 2024PERC

Power class

Power (STC)370 WCEC nameplate
Efficiency≥19.8%datasheet minimum
%/°C Pmax−0.339CEC listing test
Performance warranty30 yrdatasheet

Power classes

CEC PV Module List (Oct 7, 2026) · VSUN (Vietnam Sunergy) datasheet · Cali-Graf calculation · 13 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
VSUN365-120BMH	365 W	41.10	11.19	34.30	10.66	≥19.5%	341 W	May 11, 2022
VSUN370-120BMH	370 W	41.40	11.26	34.50	10.72	≥19.8%	346 W	May 11, 2022
VSUN375-120BMH	375 W	41.60	11.32	34.80	10.78	≈20.5%	350 W	May 11, 2022
VSUN380-120BMH	380 W	41.80	11.40	35.00	10.86	≈20.8%	355 W	May 11, 2022
VSUN385-120BMH	385 W	42.00	11.47	35.20	10.94	≈21.0%	360 W	May 11, 2022
VSUN435-120BMH	435 W	41.52	13.33	34.45	12.63	≈20.1%	409 W	Jul 3, 2023
VSUN440-120BMH	440 W	41.70	13.41	34.60	12.72	≈20.4%	414 W	Jul 3, 2023
VSUN445-120BMH	445 W	41.90	13.48	34.80	12.79	≈20.6%	419 W	Jul 3, 2023
VSUN450-120BMH	450 W	42.10	13.56	35.00	12.86	≈20.8%	424 W	Jul 3, 2023
VSUN455-120BMH	455 W	42.30	13.63	35.20	12.93	≈21.1%	428 W	Jul 3, 2023
VSUN460-120BMH	460 W	42.50	13.71	35.40	13.00	≈21.3%	433 W	Jul 3, 2023
VSUN465-120BMH	465 W	42.65	13.79	35.56	13.08	≈21.5%	438 W	Jul 3, 2023
VSUN470-120BMH	470 W	42.81	13.86	35.69	13.17	≈21.8%	443 W	Jul 3, 2023

≈ efficiency = Pmax ÷ CEC-listed area 1.83 m² for classes outside the datasheet.

Build & dimensions

CEC PV Module List (Oct 7, 2026) · VSUN (Vietnam Sunergy) datasheet

Module area2.16 m² (23.3 ft²)CEC-listed area
Cells120 half-cut cells (12 × 10)PERC
Back coverTransparent mesh
Junction boxIP≧67, 3 diodes
Cable / connectorPotrait: 300 mm (cable length can be customized) , 1x4 mm 2

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · VSUN (Vietnam Sunergy) datasheet

	Datasheet	CEC listing test
Pmax coefficient γ	—	−0.339 %/°C
Voc coefficient β	—	−0.268 %/°C
Isc coefficient α	—	+0.031 %/°C
Vmp coefficient	≈ −0.37 %/°C	—
Operating cell temperature	NMOT 45 °C	NOCT 45.3 °C

Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
365 W	270.4 W	32.33 V × 8.36 A	70.2 W	96%
370 W	273.5 W	32.52 V × 8.41 A	71 W	96%
375 W	277.5 W	32.8 V × 8.46 A	72 W	96%
380 W	281.1 W	32.99 V × 8.52 A	72.9 W	96%
385 W	284.8 W	33.18 V × 8.58 A	73.9 W	96%
435 W	325 W	32.18 V × 10.1 A	82 W	94%
440 W	328.7 W	32.32 V × 10.17 A	82.9 W	94%
445 W	332.5 W	32.51 V × 10.23 A	83.8 W	94%
450 W	336.2 W	32.69 V × 10.28 A	84.8 W	94%
455 W	340 W	32.88 V × 10.34 A	85.7 W	94%
460 W	343.7 W	33.07 V × 10.39 A	86.7 W	94%
465 W	347.4 W	33.22 V × 10.46 A	87.6 W	94%
470 W	351.1 W	33.34 V × 10.53 A	88.5 W	94%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

Max system voltage1500 V
Max series fuse20 A
Protection classclass A
Design load push / pull113 psf5,400 Pa
Module temperature−40 °F to +185 °F−40 °C to +85 °C
Hail25 mm (0.98 in)

Bifacial performance

NLR SAM module library · VSUN (Vietnam Sunergy) datasheet

BifacialYes
Bifaciality70 ± 5%
Back coverTransparent mesh

Rear gain depends on mounting height and ground reflectance; flush roof mounts receive little rear light.

Warranty & degradation

VSUN (Vietnam Sunergy) datasheet

Performance warranty30 years, linear

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

2023, 2024

PVEL Top Performer

this series

Tests passed as Top Performer

DH, LID+LETID, MSS, PID, TC

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

Year	Product	Tests
2023	VSUNxxx-120BMH	DHLID+LETIDPIDTC
2024	VSUNxxx-120BMH	LID+LETIDMSSTC
2023	VSUNxxx-120BMH-DG (closely related product name)	DHLID+LETIDPIDTC

Tested bill of materials

PVEL-tested factoryVietnam
Cell technology (tested BOM)p-type PERC
Module design (tested BOM)bifacial - glass//backsheet
Power class range tested430-475W

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

RETC PV Module Index — VSUN (Vietnam Sunergy)

Year	Recognition
2024	Test Category High Achiever
2025	Overall Highest Achiever
2026	Overall 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)

CityColdest air, °CHottest cell, °CString inverter

44 V

Voc when cold

per panel

28.2 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

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	3–13
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–13
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–13
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–11

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	44 / 28.2 V	⚠ Works; below MPPT at peak heat	1.28
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	44 / 28.2 V	✗ Not a match: module voltage below MPPT range	0.97
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	44 / 28.2 V	✓ Within range	0.47
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	44 / 28.2 V	⚠ Works; below MPPT at peak heat	1.14
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	44 / 28.2 V	⚠ Works; below MPPT at peak heat	1.06

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

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	620	11,782	6.08
Palmdale	1,835	679	12,900	6.69
Chula Vista	1,696	628	11,923	6.11
Huntington Beach	1,643	608	11,550	5.89
Riverside	1,696	628	11,923	6.21
Santa Clarita	1,724	638	12,120	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.

Compare with similar 370 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)
VSUN (Vietnam Sunergy) VSUN370-120BMH	370 W	≥19.8%	−0.339	41.4	11.26	product 2023, 2024	—
LONGi LR4-60HPB-370M	370 W	≈20.9%	−0.339	41.2	11.5	product 2021, 2022	193
Canadian Solar CS3N-375MS {Blk}	375 W	≈19%	−0.342	43.5	11.2	product 2023	46
REC Group REC370AA	370 W	≈21.9%	−0.258	44.1	10.55	brand 9× (2016–2025)	30

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

ManufacturerVSUN (Vietnam Sunergy)
Listed in CEC asVietnam Sunergy Joint Stock Company
Websitevsun-solar.com
PVEL Top Performer (manufacturer)6 Scorecards (2021–2026)
RETC PV Module Index2024, 2025, 2026
Current panel series in CEC list82

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) VSUN370-120BMH?

The VSUN (Vietnam Sunergy) datasheet guarantees at least 19.8% module efficiency for the 370 W class. 370 W over 2.16 m² equals about 171 W per square meter.

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

PVWatts v8 with typical-year weather gives about 620 kWh per year per 370 W panel in Los Angeles and about 679 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.339 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 17.5% 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 3–13 panels per string (Voc at 2 °C = 44 V, Vmp at 74 °C cell = 28.2 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 44 V vs max input 60 V; Vmp when hot 28.2 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

What does the warranty cover?

30 years linear on performance (manufacturer datasheet).

Is it bifacial?

Yes, bifaciality 70 ± 5%. Rear gain depends on mounting height and ground reflectance.

Has this panel been reliability-tested?

VSUNxxx-120BMH was a PVEL Top Performer in 2023, 2024 (DH, LID+LETID, MSS, PID, TC).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
VSUN (Vietnam Sunergy) — manufacturer datasheet “VSUN370-120BMH Highest power output VSUN370-120BMH VSUN365-120BMH”.
Canadian Solar — manufacturer datasheet “HiKu Mono PERC CS3N-400|405|410|415|420|425MS MORE POWER”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2021–2026.
RETC — PV Module Index reports 2024–2026.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (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 — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).