Illustration · 132 half-cut cells

Solar panelVSUN (Vietnam Sunergy)

VSUN (Vietnam Sunergy) VSUN680N-132BMH-DG

Name: VSUN (Vietnam Sunergy) VSUN680N-132BMH-DG
Brand: VSUN (Vietnam Sunergy)

132 half-cut cells, bifacial, glass (dual-glass module). Power classes 520–710 W in the CEC list.

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

Power class

Power (STC)680 WCEC nameplate
Efficiency≈21.9%calculated from area
%/°C Pmax−0.304CEC listing test
PTC / STC94.3%PTC 641 W (CEC)

Power classes

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

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
VSUN520N-132BMH-DG	520 W	47.19	13.68	39.88	13.04	≈21.9%	492 W	Jul 1, 2025
VSUN525N-132BMH-DG	525 W	47.41	13.74	40.11	13.09	≈22.1%	497 W	Jul 1, 2025
VSUN530N-132BMH-DG	530 W	47.63	13.80	40.34	13.14	≈22.3%	502 W	Jul 1, 2025
VSUN535N-132BMH-DG	535 W	47.85	13.86	40.57	13.19	≈22.5%	507 W	Jul 1, 2025
VSUN540N-132BMH-DG	540 W	48.09	13.91	40.79	13.24	≈22.7%	512 W	Jul 1, 2025
VSUN545N-132BMH-DG	545 W	48.30	13.97	41.01	13.29	≈23.0%	517 W	Jul 1, 2025
VSUN680N-132BMH-DG	680 W	47.40	18.18	39.60	17.16	≈21.9%	641 W	Apr 11, 2025
VSUN685N-132BMH-DG	685 W	47.70	18.21	39.80	17.19	≈22.1%	646 W	Apr 11, 2025
VSUN690N-132BMH-DG	690 W	47.90	18.25	40.10	17.23	≈22.2%	651 W	Apr 11, 2025
VSUN695N-132BMH-DG	695 W	48.30	18.28	40.30	17.25	≈22.4%	656 W	Apr 11, 2025
VSUN700N-132BMH-DG	700 W	48.50	18.32	40.50	17.29	≈22.5%	661 W	Apr 11, 2025
VSUN705N-132BMH-DG	705 W	48.70	18.37	40.70	17.33	≈22.7%	666 W	Apr 11, 2025
VSUN710N-132BMH-DG	710 W	48.90	18.42	40.90	17.36	≈22.9%	670 W	Apr 11, 2025

≈ efficiency = Pmax ÷ CEC-listed area 2.37 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area3.11 m² (33.4 ft²)CEC-listed area
Cells132 half-cut cells
Back coverGlass (dual-glass module)

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.304 %/°C
Voc coefficient β	−0.236 %/°C
Isc coefficient α	+0.035 %/°C
Operating cell temperature	NOCT 45.1 °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
520 W	394 W	38.48 V × 10.24 A	100.6 W	97%
525 W	397.7 W	38.7 V × 10.28 A	101.6 W	97%
530 W	401.6 W	38.92 V × 10.32 A	102.6 W	97%
535 W	405.4 W	39.15 V × 10.36 A	103.5 W	97%
540 W	409.1 W	39.36 V × 10.4 A	104.5 W	97%
545 W	412.9 W	39.57 V × 10.43 A	105.5 W	97%
680 W	504.7 W	37.87 V × 13.33 A	130.4 W	96%
685 W	508.1 W	38.06 V × 13.35 A	131.3 W	96%
690 W	513.1 W	38.35 V × 13.38 A	132.6 W	96%
695 W	516.3 W	38.54 V × 13.4 A	133.4 W	96%
700 W	520 W	38.73 V × 13.43 A	134.4 W	96%
705 W	523.8 W	38.92 V × 13.46 A	135.4 W	96%
710 W	527.3 W	39.12 V × 13.48 A	136.3 W	96%

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

Tests passed as Top Performer

DH, LID+LETID, PID

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-132BMH-DG	DHLID+LETIDPID
2024	VSUNxxxN-132BMH (closely related product name)	LID+LETID

Tested bill of materials

PVEL-tested factoryVietnam
Cell technology (tested BOM)n-type TOPCon
Module design (tested BOM)bifacial - glass//glass
Power class range tested530-575W

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

50 V

Voc when cold

per panel

33 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	2–12
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–12
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–12
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	8–9

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	1,140	11,397	6.08
Palmdale	1,835	1,248	12,478	6.69
Chula Vista	1,696	1,153	11,533	6.11
Huntington Beach	1,643	1,117	11,172	5.89
Riverside	1,696	1,153	11,533	6.21
Santa Clarita	1,724	1,172	11,723	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 680 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)
VSUN (Vietnam Sunergy) VSUN680N-132BMH-DG	680 W	≈21.9%	−0.304	47.4	18.18	product 2024
Canadian Solar CS7N-680TB-AG	680 W	≈21.9%	−0.285	47.1	18.29	product 2024
Waaree BiN-03-680	680 W	≥21.9%	−0.302	47.55	18.16	brand 5× (2022–2026)

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) VSUN680N-132BMH-DG?

Calculated from the panel area (3.11 m²): about 21.9% for the 680 W class. 680 W over 3.11 m² equals about 219 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,140 kWh per year per 680 W panel in Los Angeles and about 1,248 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.304 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.7% 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 2–12 panels per string (Voc at 2 °C = 50 V, Vmp at 74 °C cell = 33 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-132BMH-DG was a PVEL Top Performer in 2024 (DH, LID+LETID, PID).

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Canadian Solar — datasheet New N-type Bifacial Module TOPBiHiKu7 CS7N-725|730|735|740|745|750TB-AG.
Waaree — datasheet ELITE SERIES BiN-03.
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).