44.6″ · 1,133 mm wide · 1.38″ (35 mm) frame

Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN535-144BMH

Name: VSUN (Vietnam Sunergy) VSUN535-144BMH
Brand: VSUN (Vietnam Sunergy)

144 half-cut cells (12 × 12), PERC, bifacial, transparent backsheet. Power classes 430–560 W in the CEC list; datasheet covers 440–455 W.

CEC listed · May 3, 2021UL 61730Bifacial · 70 ± 5%PVEL Top Performer 2023, 2024PERC

Power class

Power (STC)535 WCEC nameplate
Efficiency≈20.9%calculated from area
%/°C Pmax−0.321CEC listing test
Performance warranty30 yrdatasheet

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · VSUN (Vietnam Sunergy) datasheet · 17 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
VSUN430-144BMH	430 W	48.60	11.20	40.40	10.65	≈16.8%	400 W	May 3, 2021
VSUN435-144BMH	435 W	48.80	11.28	40.60	10.72	≈17.0%	404 W	May 3, 2021
VSUN440-144BMH	440 W	49.00	11.36	40.80	10.79	≥19.9%	409 W	May 3, 2021
VSUN445-144BMH	445 W	49.20	11.44	41.00	10.86	≥20.1%	414 W	May 3, 2021
VSUN450-144BMH	450 W	49.40	11.52	41.20	10.93	≥20.4%	419 W	May 3, 2021
VSUN455-144BMH	455 W	49.60	11.60	41.40	11.00	≥20.6%	423 W	May 3, 2021
VSUN460-144BMH	460 W	49.80	11.67	41.60	11.06	≈18.0%	428 W	May 3, 2021
VSUN465-144BMH	465 W	50.00	11.75	41.80	11.13	≈18.2%	433 W	May 3, 2021
VSUN520-144BMH	520 W	49.11	13.53	41.11	12.65	≈20.3%	486 W	Dec 13, 2021
VSUN525-144BMH	525 W	49.22	13.63	41.22	12.74	≈20.5%	491 W	Dec 13, 2021
VSUN530-144BMH	530 W	49.35	13.71	41.35	12.82	≈20.7%	496 W	Dec 13, 2021
VSUN535-144BMH	535 W	49.50	13.78	41.50	12.90	≈20.9%	501 W	Dec 13, 2021
VSUN540-144BMH	540 W	49.65	13.85	41.65	12.97	≈21.1%	506 W	Dec 13, 2021
VSUN545-144BMH	545 W	49.81	13.92	41.80	13.04	≈21.3%	510 W	Dec 13, 2021
VSUN550-144BMH	550 W	49.92	13.99	42.00	13.10	≈21.5%	515 W	Dec 13, 2021
VSUN555-144BMH	555 W	50.04	14.07	42.15	13.17	≈21.7%	520 W	Dec 13, 2021
VSUN560-144BMH	560 W	50.14	14.16	42.24	13.26	≈21.9%	525 W	Dec 13, 2021

≈ efficiency = Pmax ÷ panel area 2.556 m² (datasheet size) for classes outside the datasheet.

Build & dimensions

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

Dimensions88.8 × 44.6 × 1.38 in2,256 × 1,133 × 35 mm
Module area2.56 m² (27.5 ft²)length × width
Cells144 half-cut cells (12 × 12)PERC
Back coverTransparent backsheet
Junction boxIP68, 3 diodes

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	—	−0.321 %/°C
Voc coefficient β	—	−0.254 %/°C
Isc coefficient α	—	+0.043 %/°C
Vmp coefficient	≈ −0.36 %/°C	—
Operating cell temperature	NMOT 45 °C	NOCT 45.8 °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
430 W	324.1 W	38.43 V × 8.43 A	85.9 W	100%
435 W	327.8 W	38.62 V × 8.49 A	86.9 W	100%
440 W	331.6 W	38.81 V × 8.54 A	87.9 W	100%
445 W	335.4 W	39 V × 8.6 A	88.9 W	100%
450 W	339.2 W	39.19 V × 8.66 A	89.9 W	100%
455 W	343 W	39.38 V × 8.71 A	90.9 W	100%
460 W	346.6 W	39.57 V × 8.76 A	91.8 W	100%
465 W	350.4 W	39.76 V × 8.81 A	92.9 W	100%
520 W	391.1 W	38.53 V × 10.15 A	100.9 W	97%
525 W	394.9 W	38.63 V × 10.22 A	101.9 W	97%
530 W	398.6 W	38.75 V × 10.29 A	102.8 W	97%
535 W	402.6 W	38.89 V × 10.35 A	103.9 W	97%
540 W	406.2 W	39.03 V × 10.41 A	104.8 W	97%
545 W	409.9 W	39.17 V × 10.46 A	105.8 W	97%
550 W	413.7 W	39.36 V × 10.51 A	106.7 W	97%
555 W	417.4 W	39.5 V × 10.57 A	107.7 W	97%
560 W	421.2 W	39.59 V × 10.64 A	108.7 W	97%

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

Electrical & strength ratings

Max system voltage1,500 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 · CEC PV Module List (Oct 7, 2026)

BifacialYes
Bifaciality70 ± 5%
Back coverTransparent backsheet

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, HSS, 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-144BMH	DHLID+LETIDMSSPIDTC
2024	VSUNxxx-144BMH	HSSLID+LETIDPID
2023	VSUNxxx-144BMH-DG (closely related product name)	DHLID+LETIDMSSPIDTC
2024	VSUNxxx-144BMH-DG (closely related product name)	DHHSSLID+LETIDMSSPIDTC
2023	VSUNxxx-144BMH-DG (M6) (closely related product name)	DHLID+LETIDMSSPIDTC

Tested bill of materials

PVEL-tested factoryVietnam
Cell technology (tested BOM)p-type PERC
Module design (tested BOM)bifacial - glass//backsheet
Power class range tested530-575W
Hail test ice ball40 mm

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

52.4 V

Voc when cold

per panel

34.1 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	2–11
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–11
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–11
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–9

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	52.4 / 34.1 V	✗ Not a match: module voltage below MPPT range	1.41
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	52.4 / 34.1 V	✓ Within range	0.69

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	897	11,657	6.08
Palmdale	1,835	982	12,762	6.69
Chula Vista	1,696	907	11,796	6.11
Huntington Beach	1,643	879	11,427	5.89
Riverside	1,696	907	11,796	6.21
Santa Clarita	1,724	922	11,990	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 535 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	Size	PVEL (product / brand)	SoCal permits (series)
VSUN (Vietnam Sunergy) VSUN535-144BMH	535 W	≈20.9%	−0.321	49.5	13.78	88.8 × 44.6 in	product 2023, 2024	—
JA Solar JAM72D30-535/MB	535 W	≈21.2%	−0.330	49.45	13.79	—	product 2023, 2024	3
Canadian Solar CS6W-535MB-AG	535 W	≈20.8%	−0.324	49	13.85	89.2 × 44.6 in	product 2024	1
LONGi LR5-72HBD-535M	535 W	≥20.9%	−0.323	49.35	13.78	88.8 × 44.6 in	product 2026	1

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) VSUN535-144BMH?

Calculated from the panel area (2.56 m²): about 20.9% for the 535 W class. 535 W over 2.56 m² equals about 209 W per square meter.

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

PVWatts v8 with typical-year weather gives about 897 kWh per year per 535 W panel in Los Angeles and about 982 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.321 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16.6% 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 2–11 panels per string (Voc at 2 °C = 52.4 V, Vmp at 74 °C cell = 34.1 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 52.4 V vs max input 60 V; Vmp when hot 34.1 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-144BMH was a PVEL Top Performer in 2023, 2024 (DH, HSS, 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 “VSUN320-60M VSUN550-144BMH VSUN550-144BMH VSUN545-144BMH”.
VSUN (Vietnam Sunergy) — manufacturer datasheet “VSUN455-144BMH VSUN455-144BMH VSUN450-144BMH Highest power output”.
Canadian Solar — datasheet BiHiKu6 BIFACIAL MONO PERC CS6W-520|525|530|535|540|545|550MB-AG.
LONGi — manufacturer datasheet “LR5-72HBD Suitable for distributed projects Advanced module technology delivers superior”.
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).