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VSUN Brand review

VSUN390-108BMH-DG

390 Wp PERC Bifacial 70%
ComparePV verdict

Strong in heat, heavy for its output

Rank 12,160 of 14,005
Compare panels Datasheet PDF
Power (Wp)
390
Typical for its class
Efficiency (%)
19.97
Typical · median 19.90%
Density (Wp/m²)
199.7
Typical · median 199.0
Temp (%/°C)
-0.320
Strong · top 4%
Weight (kg)
24.7
Weak · 3.3 kg above median
Warranty (yrs)
30
Strong · top 13%

The VSUN405-108BMH-DG series is an advanced Bifacial Double Glass solution that redefines performance standards in harsh environmental conditions. The use of double tempered glass instead of a traditional backsheet not only eliminates the risk of micro-cracks but, above all, allows for additional energy yield from the rear side of the module, which is crucial when installed on highly reflective surfaces. The use of 108 monocrystalline cells in Half-Cut and Multi-Busbar technology significantly reduces internal resistive losses and clearly improves module performance in partial shading conditions. This design effectively solves the problem of light-induced degradation (LID) and ensures exceptional temperature stability, which directly translates to higher electricity production on hot days. This series is dedicated to investors focusing on maximum system longevity, making it ideal for both large solar farms and demanding prosumer installations. What distinguishes it from the competition is its exceptional resistance to extreme external factors, such as salt mist or ammonia, while maintaining an aesthetic appearance and optimal dimensions for easy roof mounting. By choosing this model, you are investing in technology that guarantees long-term profitability and minimization of operating costs.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.97% 19.90% Typical 12,302
Power density 199.7 199.0 Typical 12,255
Temperature coefficient -0.320 -0.350 Strong · top 4% 8,312
Weight per kWp 63.3 55.8 Weak · bottom 15% 12,877
Performance warranty 30 yrs 25 yrs Strong · top 13% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 1 caution
Best for

Residential, commercial, shaded-installations and hot-climate.

Not ideal for

Weight-limited structures.

Strengths
-0.320 %/°C temperature coefficient

Top 4% of the PERC 350-400 W segment, against a median of -0.350. Ranked 8,312th in the whole database.

30 year performance warranty

Top 13% of the PERC 350-400 W segment, against a median of 25 yrs.

Watch-outs
63.3 kg per kWp

Bottom 15% of the PERC 350-400 W segment, against a median of 55.8.

Notes from the database
  • At 20.0% efficiency, this panel is 0.5pp above typical PERC 0-400W modules (median: 19.4%)
  • 199.7 W/m² power density - 5.3 W/m² more than PERC 0-400W median (194.4 W/m²), more power per roof area
  • -0.32%/°C temperature coefficient (median: -0.36%/°C) - retains ~2% more power at high temperatures
  • Weight of 24.7 kg is 4.2 kg above PERC 0-400W median (20.5 kg) - verify structural support
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.97 % Typical Segment median 19.90%
Vmpp · Impp 30.82 V · 12.66 A Operating point at max power
Voc · Isc 36.84 V · 13.50 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 24.7 kg Weak Weak · 3.3 kg above median
Cells 108 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.320 %/°C Strong top 4% of its segment
Coefficient Voc · Isc -0.270 · 0.048 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 13% · median 25 yrs
Degradation 2.00 % First year

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.320 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
VSUN VSUN390-108BMH-DG 390 W 19.97% -0.320 24.7 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +50 W, cooler, +3.1 pp
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, lighter, +3.0 pp
GKA210M360W 360 W 23.00% - 16.2 kg -30 W, lighter, +3.0 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg -10 W, lighter, +3.0 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +10 W, lighter, +3.0 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +10 W, lighter, +3.0 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg -10 W, lighter, +3.0 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +50 W, cooler, +2.9 pp
VSUN395-108BMH-DG 395 W 20.23% -0.320 24.7 kg +0.3 pp
VSUN400-108BMH-DG 400 W 20.48% -0.320 24.7 kg +10 W, +0.5 pp
VSUN405-108BMH-DG 405 W 20.74% -0.320 24.7 kg +15 W, +0.8 pp
VSUN410-108BMH 410 W 21.00% -0.320 21.4 kg +20 W, lighter, +1.0 pp
VSUN415N-108MH 415 W 21.25% -0.300 21.4 kg +25 W, lighter, +1.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +120 W, cooler, +5.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +105 W, cooler, +4.8 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +115 W, cooler, +4.7 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How much extra energy do VSUN405-108BMH-DG bifacial panels generate?
The double tempered glass construction lets the module capture light reflected off the surface beneath it. Depending on the ground albedo (light-colored roofing, gravel, snow), the additional energy yield can range from a few percent up to 20-25% compared to a standard monofacial panel. The biggest gains occur on ground-mount systems or light-colored flat roofs where reflected light freely reaches the rear cells.
Are VSUN405-108BMH-DG panels suitable for a sloped residential roof?
Yes, though due to the double-glass construction these panels are somewhat heavier than standard backsheet modules, so it's worth checking the roof's load capacity before installation. Half-Cut cell technology improves module performance under partial shading, such as from a chimney or antenna, a common issue on residential sloped roofs.
What warranty comes with VSUN405-108BMH-DG panels?
The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty, guaranteeing the declared energy production level throughout that period. Since this series has been discontinued, buyers should confirm with the distributor that warranty service terms are still active and enforceable.
Are VSUN405-108BMH-DG panels still available for purchase?
No, production of this series has ended, replaced by newer TOPCon cell models with higher power output. VSUN405-108BMH-DG panels can still be found only in warehouse clearance stock through distributors while supplies last, so availability and pricing may vary by wholesaler.
What do Half-Cut and Multi-Busbar technologies offer in the 108-cell VSUN405-108BMH-DG panel?
Splitting the monocrystalline cells into halves (half-cut) reduces internal resistive losses and limits the impact of partial shading on total panel output. Combined with multi-busbar technology, which adds more current-carrying paths across the cell surface, the panel achieves higher efficiency (around 20.7%) and is less susceptible to power loss caused by microcracks.
Is VSUN a Tier 1 manufacturer, and is it trustworthy for a large-scale installation?
VSUN is not currently listed as a Tier 1 manufacturer under the Bloomberg NEF classification, which may matter for certain bank financing options on commercial projects. The company does maintain a European distribution center in Germany, simplifying logistics and warranty support within the EU, and its PERC cell quality remains technically competitive.
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