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Vespa Solar Enerji Brand review

VSP555T-M10-144H

555 Wp PERC Bifacial 70%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 5,790 of 14,005
Compare panels Datasheet PDF
Power (Wp)
555
Typical for its class
Efficiency (%)
21.50
Strong · top 18%
Density (Wp/m²)
214.8
Typical · median 212.9
Temp (%/°C)
-0.340
Typical · median -0.350
Weight (kg)
28.2
Typical · median 30.8 kg
Warranty (yrs)
30
Strong · top 25%

The VSP-T series consists of bifacial photovoltaic modules engineered to capture sunlight from both the front and rear side of the panel, maximizing energy harvest without expanding the installation footprint. At the core of the design are PERC monocrystalline 182mm (M10) cells built with half-cut technology and a multibusbar layout, which meaningfully reduces power losses under partial shading and improves performance stability in less-than-ideal irradiance conditions. Thanks to the extra yield generated from the rear surface, project owners gain higher energy output per square meter, which lowers BoS costs and shortens the return on investment (ROI) timeline. This makes the VSP-T series well suited for residential rooftops as well as commercial, industrial, and utility-scale ground-mount projects. Every module undergoes a triple electroluminescence (3 EL) test, ensuring high build quality and catching hidden micro-cracks before they leave the factory. The construction is completed with a PID-resistant laminate, a durable frame, and a UV-blocking backsheet that supports better heat dissipation. Mechanical durability rated for snow loads up to 5400 Pa and wind loads up to 2400 Pa makes these panels resilient against harsh weather, sand, salt mist, and hail, backed by a linear power warranty spanning 30 years.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.50% 21.29% Strong · top 18% 7,958
Power density 214.8 212.9 Typical 8,148
Temperature coefficient -0.340 -0.350 Typical 8,778
Weight per kWp 50.8 52.7 Typical 4,217
Performance warranty 30 yrs 27 yrs Strong · top 25% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

Residential, commercial, utility-scale and shaded-installations.

Strengths
21.50% module efficiency

Top 18% of the PERC 550-600 W segment, against a median of 21.29%.

30 year performance warranty

Top 25% of the PERC 550-600 W segment, against a median of 27 yrs.

Notes from the database
  • At 21.5% efficiency, this panel is on par with typical PERC 550-600W modules
  • At 214.8 W/m² power density, roof space requirements are typical for PERC 550-600W panels
  • At -0.34%/°C, hot weather performance is typical for PERC 550-600W panels
  • 28.2 kg weight - 2.6 kg lighter than PERC 550-600W median (30.8 kg), reducing installation effort
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.50 % Strong Segment median 21.29%
Vmpp · Impp 42.09 V · 13.19 A Operating point at max power
Voc · Isc 49.95 V · 14.02 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×35 mm · 2.58 m² of roof
Weight 28.2 kg Typical Typical · median 30.8 kg
Cells 144 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.260 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Strong top 25% · median 27 yrs
End-of-warranty output 85.0 % Equals 471 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

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
-0.340 %/°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
Vespa Solar Enerji VSP555T-M10-144H 555 W 21.50% -0.340 28.2 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.5 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -50 W, cooler, +3.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.1 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, lighter, +2.9 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +2.9 pp
VSP540T-M10-144H 540 W 20.92% -0.340 28.2 kg -15 W, -0.6 pp
VSP545T-M10-144H 545 W 21.12% -0.340 28.2 kg -10 W, -0.4 pp
VSP550T-M10-144H 550 W 21.31% -0.340 28.2 kg Very close match
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +85 W, cooler, +3.3 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +80 W, cooler, +3.1 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +75 W, cooler, +2.9 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2542 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the bifacial VSP-T panel differ from a standard mono-facial panel?
VSP-T series panels feature a transparent rear laminate instead of a standard backsheet, allowing the PERC cells to also capture light reflected off the roof or ground behind the module. This additional bifacial energy gain typically adds several to over ten percent more energy yield from the same roof area without adding more panels, lowering the cost per kilowatt-hour produced.
What warranty comes with VSP-T panels and what does it cover?
Vespa Solar Enerji provides a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty guaranteeing a defined minimum percentage of initial output throughout that period. This warranty structure is standard for modern PERC bifacial modules and gives investors confidence in stable energy yield over the system's lifetime.
Are 555 Wp VSP-T panels suitable for a residential installation?
Yes, output up to 555 Wp makes the VSP-T series well suited to both small residential rooftop systems and larger commercial projects. A higher per-module power rating means fewer panels are needed to reach the target system capacity, which shortens installation time and reduces mounting structure and cabling costs.
What is half-cut cell technology in VSP-T panels and why does it matter?
Half-cut means each silicon cell is cut in half and connected in a multibusbar layout. This significantly reduces power losses from partial shading, such as from a chimney or a fallen leaf, compared to traditional full-cell panels, and it also lowers thermal losses, resulting in better real-world efficiency across varying sunlight conditions.
Can VSP-T panels withstand heavy wind and snow loads?
Yes, VSP-T modules are rated for mechanical loads of up to 5400 Pa for snow and 2400 Pa for wind, exceeding typical requirements for most climates. The reinforced frame and PID-resistant laminate also help the panels perform reliably under harsh conditions, including sand, salt spray, and hail.
Is Vespa Solar Enerji a tier 1 manufacturer, and where are VSP-T panels made?
Vespa Solar Enerji is a Turkish manufacturer that currently does not appear on the Bloomberg NEF tier 1 list. This does not indicate lower build quality, since every panel undergoes triple electroluminescence testing (3 EL) to eliminate hidden microcracks, but it is worth considering when arranging project financing or insurance, where tier 1 status is sometimes a requirement.
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