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Selfa SV108M.3-405
Selfa Brand review

SV108M.3-405

405 Wp PERC
ComparePV verdict

Warranty pick, weak in heat

Rank 11,158 of 14,129
Compare panels Datasheet PDF
Power (Wp)
405
Typical for its class
Efficiency (%)
20.70
Typical · median 20.60%
Density (Wp/m²)
207.2
Typical · median 206.2
Temp (%/°C)
-0.360
Weak · bottom 15%
Weight (kg)
22.1
Typical · median 22.0 kg
Warranty (yrs)
30
Strong · top 17%

The Selfa PREMIUM photovoltaic panel series is a technologically advanced solution that combines Polish engineering with the highest standards of resistance to harsh weather conditions. These panels are based on the innovative structure of Half-Cut cell technology, which significantly minimizes energy losses resulting from partial shading and lowers the module's operating temperature. A key distinguishing feature of the series is the use of a unique Self-Cleaning coating, which actively limits the accumulation of dust and pollutants, translating into higher energy yields in the long term without the need for frequent maintenance. Unlike mass-produced modules, the PREMIUM line places special emphasis on fire safety and the mechanical strength of the frame, making it an ideal choice for demanding prosumer installations and large commercial projects. Users gain a real benefit in the form of local technical support and full resistance to potential-induced degradation (PID), which guarantees power production stability for decades. Choosing this series is a conscious investment in components with increased resistance to extreme snow and wind loads, which in the variable Polish climate is a key selling point, effectively distinguishing these modules from cheaper, foreign competition.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 20.60% Typical 10,842
Power density 207.2 206.2 Typical 10,827
Temperature coefficient -0.360 -0.350 Weak · bottom 15% 12,425
Weight per kWp 54.6 53.0 Typical 9,015
Performance warranty 30 yrs 25 yrs Strong · top 17% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 1 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Hot climates.

Strengths
30 year performance warranty

Top 17% of the PERC 400-450 W segment, against a median of 25 yrs.

Watch-outs
-0.360 %/°C temperature coefficient

Bottom 15% of the PERC 400-450 W segment, against a median of -0.350.

Notes from the database
  • Efficiency of 20.7% matches the PERC 400-450W median
  • At 207.2 W/m² power density, roof space requirements are typical for PERC 400-450W panels
  • Temperature coefficient of -0.36%/°C matches the PERC 400-450W median
  • #10842 for efficiency, #12425 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 405 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Typical Segment median 20.60%
Vmpp · Impp 31.38 V · 12.91 A Operating point at max power
Voc · Isc 37.24 V · 13.81 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1724×1134×30 mm · 1.96 m² of roof
Weight 22.1 kg Typical Typical · median 22.0 kg
Cells 108 · PERC Monocrystalline
Coefficient Pmax -0.360 %/°C Weak bottom 15% of its segment
Coefficient Voc · Isc -0.300 · 0.060 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Strong top 17% · median 25 yrs
End-of-warranty output 80.0 % Equals 324 W guaranteed
Degradation 0.67 → 0.67 % 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
-

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

Heat losses
-0.360 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Selfa SV108M.3-405 405 W 20.70% -0.360 22.1 kg You are here
AIKO-455-MAH54Db 455 W 23.30% -0.260 24.0 kg +50 W, cooler, +2.6 pp
LR5-54HTH-455M 455 W 23.30% -0.290 20.8 kg +50 W, cooler, +2.6 pp
YL455CF54 e/2 455 W 23.30% -0.290 20.3 kg +50 W, cooler, +2.6 pp
ESM-455T 455 W 23.30% -0.310 21.0 kg +50 W, cooler, +2.6 pp
SE5-54HBC-455W 455 W 23.30% -0.290 20.8 kg +50 W, cooler, +2.6 pp
JST-EDMH-(445-465)W-TD (455W class) 455 W 23.30% -0.300 20.5 kg +50 W, cooler, +2.6 pp
LX-455M/182R-96+ GG 455 W 23.30% -0.260 23.5 kg +50 W, cooler, +2.6 pp
SV108M.4.3-400 400 W 20.50% -0.360 22.0 kg Very close match
SV108M.4.3-410 410 W 21.00% -0.360 22.0 kg +0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +105 W, cooler, +4.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +90 W, cooler, +4.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +100 W, cooler, +4.0 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +100 W, cooler, +4.0 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +85 W, cooler, +3.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +95 W, cooler, +3.8 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +95 W, cooler, +3.8 pp

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1931 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the PREMIUM series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What warranty comes with the Selfa PREMIUM panels and what does it cover?
The Selfa PREMIUM series carries a 20-year product warranty covering material and manufacturing defects, plus a 30-year linear power output warranty. The manufacturer guarantees that the panels will retain at least 80% of their rated power after 30 years. An added advantage is local technical support provided by a Polish manufacturer, which translates to faster warranty claims processing compared to brands operating from distant Asian markets.
What are the benefits of the Half-Cut PERC cell technology used in Selfa PREMIUM panels?
Half-cut cells are physically split in half, reducing internal resistance and lowering thermal losses. Combined with PERC technology, which reflects unused photons back into the cell for a second absorption pass, Selfa PREMIUM panels achieve higher conversion efficiency. In practice, this means better performance under partial shading, for example from a chimney or dormer window, and a lower cell operating temperature that extends the module's service life.
Can Selfa PREMIUM 550 Wp panels handle heavy snowfall and strong winds in Polish conditions?
Yes, the PREMIUM series is engineered with Poland's variable climate in mind. The manufacturer places particular emphasis on the mechanical strength of the frame, and the modules meet rigorous snow and wind load standards. This makes the panels a reliable choice for both pitched roof installations and ground-mounted systems in regions with significant snow accumulation or high wind exposure.
What is the Self-Cleaning coating on Selfa PREMIUM panels and does it actually work?
The Self-Cleaning coating is a hydrophobic treatment applied to the front glass that causes rainwater to collect dust and contaminants and carry them off the module surface. In practice, this reduces the need for manual cleaning, especially in areas with moderate rainfall. The effect is most pronounced at roof tilt angles above 15 degrees. It does not eliminate maintenance entirely, but it measurably reduces energy yield losses caused by soiling.
What is PID resistance and why does it matter for Selfa PREMIUM panels?
PID, or Potential Induced Degradation, is the gradual loss of module power caused by high system voltage, especially in high-humidity environments. Selfa PREMIUM panels are fully PID-resistant, which is critical for long-term prosumer and commercial installations. Without this protection, irreversible power losses can occur within just a few years of operation, significantly reducing the return on investment.
Are Selfa PREMIUM panels suitable for large commercial projects or only for residential use?
The PREMIUM series, with modules rated up to 550 Wp, is designed for both demanding prosumer installations and large-scale commercial projects. High per-module power output reduces the total number of modules needed, lowering balance-of-system and labor costs per MW. The elevated fire safety standards and mechanical durability make this series especially well-suited for projects with stricter technical and regulatory requirements, such as public or industrial buildings.
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