Illustration · 144 cells

Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN575N-144BMH

Name: VSUN (Vietnam Sunergy) VSUN575N-144BMH
Brand: VSUN (Vietnam Sunergy)

144 cells, bifacial, white backsheet. Power classes 550–600 W in the CEC list.

CEC listed · Dec 11, 2023UL 61730BifacialPVEL Top Performer 2024, 2025

Power class

Power (STC)575 WCEC nameplate
Efficiency≈22.3%calculated from area
%/°C Pmax−0.308CEC listing test
PTC / STC94%PTC 540 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 11 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
VSUN550N-144BMH	550 W	50.31	14.02	41.64	13.22	≈21.3%	517 W	Dec 11, 2023
VSUN555N-144BMH	555 W	50.50	14.08	41.80	13.28	≈21.5%	522 W	Dec 11, 2023
VSUN560N-144BMH	560 W	50.67	14.13	41.95	13.34	≈21.7%	527 W	Dec 11, 2023
VSUN565N-144BMH	565 W	50.87	14.19	42.14	13.41	≈21.9%	532 W	Dec 11, 2023
VSUN570N-144BMH	570 W	51.58	13.72	43.65	13.06	≈22.1%	536 W	Dec 11, 2023
VSUN575N-144BMH	575 W	51.81	13.77	43.86	13.11	≈22.3%	540 W	Dec 11, 2023
VSUN580N-144BMH	580 W	52.02	13.83	44.08	13.16	≈22.5%	545 W	Aug 21, 2024
VSUN585N-144BMH	585 W	52.25	13.88	44.29	13.21	≈22.7%	550 W	Aug 21, 2024
VSUN590N-144BMH	590 W	52.48	13.93	44.50	13.26	≈22.9%	555 W	Aug 21, 2024
VSUN595N-144BMH	595 W	52.69	13.98	44.71	13.31	≈23.1%	560 W	Aug 21, 2024
VSUN600N-144BMH	600 W	52.90	14.03	44.92	13.36	≈23.3%	564 W	Aug 21, 2024

≈ efficiency = Pmax ÷ CEC-listed area 2.58 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.58 m² (27.8 ft²)CEC-listed area
Cells144 cells
Back coverWhite backsheet
FrameWhite frame

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	CEC listing test
Pmax coefficient γ	−0.308 %/°C
Voc coefficient β	−0.251 %/°C
Isc coefficient α	+0.053 %/°C
Operating cell temperature	NOCT 46.1 °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
550 W	413.1 W	40.95 V × 10.09 A	105.8 W	96%
555 W	416.5 W	41.1 V × 10.13 A	106.7 W	96%
560 W	419.9 W	41.25 V × 10.18 A	107.5 W	96%
565 W	424 W	41.44 V × 10.23 A	108.6 W	96%
570 W	427.2 W	39.74 V × 10.75 A	110.8 W	97%
575 W	430.9 W	39.93 V × 10.79 A	111.8 W	97%
580 W	434.8 W	40.13 V × 10.83 A	112.8 W	97%
585 W	438.5 W	40.32 V × 10.87 A	113.7 W	97%
590 W	442.2 W	40.51 V × 10.92 A	114.7 W	97%
595 W	446 W	40.71 V × 10.96 A	115.7 W	97%
600 W	449.8 W	40.9 V × 11 A	116.7 W	97%

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, 2025, 2026

PVEL Top Performer

this series

Tests passed as Top Performer

DH, HSS, LID+LETID, MSS, PAN, 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
2024	VSUNxxxN-144BMH	HSSLID+LETIDMSSPAN
2025	VSUNxxxN-144BMH	HSSLID+LETID
2024	VSUNxxxN-144BMH-DG (closely related product name)	DHHSSLID+LETIDMSSPANPID
2026	VSUNxxxN-144BMH-DG (closely related product name)	HSSLID+LETIDMSSPANPIDTC
2025	VSUNxxxN-144BMH- DG (closely related product name)	DHHSSLID+LETIDMSSPANPIDTC

Tested bill of materials

PVEL-tested factoryVietnam
Cell technology (tested BOM)n-type TOPCon
Module design (tested BOM)bifacial - glass//glass
Power class range tested580-625W
Hail test ice ball50 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

54.8 V

Voc when cold

per panel

36.1 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	2–10
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–10
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–10
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–9

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

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	964	11,564	6.08
Palmdale	1,835	1,055	12,662	6.69
Chula Vista	1,696	975	11,702	6.11
Huntington Beach	1,643	945	11,337	5.89
Riverside	1,696	975	11,702	6.21
Santa Clarita	1,724	991	11,896	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 575 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
VSUN (Vietnam Sunergy) VSUN575N-144BMH	575 W	≈22.3%	−0.308	51.81	13.77	product 2024, 2025	—
ZNShine Solar ZXM7-UHLDD144-575/N	575 W	≈22.5%	−0.281	51.3	14.29	product 2024, 2025, 2026	1
Phono Solar PS575M8GFH-24/TNH	575 W	≈22.5%	−0.293	52.5	13.6	product 2024, 2025	1
Qcells Q.PEAK DUO XL-G11S.3/BFG 575	575 W	≈21.1%	−0.348	53.52	13.67	product 2024, 2025, 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) VSUN575N-144BMH?

Calculated from the panel area (2.58 m²): about 22.3% for the 575 W class. 575 W over 2.58 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 964 kWh per year per 575 W panel in Los Angeles and about 1,055 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.308 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16% 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 = 54.8 V, Vmp at 74 °C cell = 36.1 V). Final design must follow the inverter manual and NEC 690.7.

Is it bifacial?

Yes. Rear gain depends on mounting height and ground reflectance.

Has this panel been reliability-tested?

VSUNxxxN-144BMH was a PVEL Top Performer in 2024, 2025 (HSS, LID+LETID, MSS, PAN).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
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 — 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).