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Selfa Brand review

SV120M.5(3)-335

335 Wp PERC
ComparePV verdict

Space saver, no clear weak spot

Rank 12,992 of 14,129
Compare panels Datasheet PDF
Power (Wp)
335
Strong · top 22%
Efficiency (%)
19.80
Strong · top 19%
Density (Wp/m²)
198.5
Strong · top 17%
Temp (%/°C)
-0.370
Typical · median -0.360
Weight (kg)
18.9
Strong · top 18%
Warranty (yrs)
25
Typical · median 25 yrs

The SV120M.5(3) series consists of monocrystalline PV modules designed for investors who expect high reliability without compromising on price or the visual finish of their installation. The panels are built on PERC cells connected in a half-cut configuration, significantly reducing power losses caused by shading or microcracks and allowing the module to perform more stably throughout its service life. The use of 5 busbars improves current collection from the cells and increases mechanical resistance to microdamage, resulting in fewer failures under harsh weather conditions. A key advantage of the series is SELF-C technology, giving the module surface self-cleaning properties that help maintain system performance with minimal maintenance, especially in locations prone to dirt and residue buildup. The modules are PID free, protecting against potential-induced degradation and preserving declared output over the years. The frame withstands heavy wind and snow loads, making it suitable for both sloped roofs and larger ground-mounted installations. The exclusively positive power tolerance eliminates the risk of underestimating parameters during system design. The SV120M.5(3) series is aimed at installers and investors looking for a premium Polish-made product backed by an extensive service network and a long-term manufacturer warranty.

Ranking

291 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.80% 19.00% Strong · top 19% 12,501
Power density 198.5 190.0 Strong · top 17% 12,458
Temperature coefficient -0.370 -0.360 Typical 13,161
Weight per kWp 56.4 60.3 Strong · top 18% 10,732
Performance warranty 25 yrs 25 yrs Typical 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Strengths
198.5 watts per square metre

Top 17% of the PERC 300-350 W segment, against a median of 190.0.

56.4 kg per kWp

Top 18% of the PERC 300-350 W segment, against a median of 60.3.

19.80% module efficiency

Top 19% of the PERC 300-350 W segment, against a median of 19.00%.

Notes from the database
  • At 19.8% efficiency, this panel is on par with typical PERC 0-400W modules
  • 198.5 W/m² power density - 4.3 W/m² more than PERC 0-400W median (194.2 W/m²), more power per roof area
  • Temperature coefficient of -0.37%/°C matches the PERC 0-400W median
  • 18.9 kg weight - 1.6 kg lighter than PERC 0-400W median (20.5 kg), reducing installation effort
  • Ranked #12501 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 335 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.80 % Strong Segment median 19.00%
Vmpp · Impp 34.90 V · 9.60 A Operating point at max power
Voc · Isc 40.90 V · 10.21 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1684×1002×35 mm · 1.69 m² of roof
Weight 18.9 kg Strong Strong · top 18%
Cells 120 · PERC Monocrystalline
Coefficient Pmax -0.370 %/°C Typical median -0.360 of its segment
Coefficient Voc · Isc -0.304 · 0.050 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 83.0 % Equals 269 W guaranteed
Degradation 3.00 → 0.58 % 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
-0.370 %/°C against a segment median of -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Selfa SV120M.5(3)-335 335 W 19.80% -0.370 18.9 kg You are here
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.5 pp
NS-300MH-72 300 W 23.32% -0.290 12.5 kg Cooler, lighter, +3.5 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.3 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.3 pp
ZEUS 3.2 285WP FullBlack 285 W 23.14% -0.260 15.6 kg -50 W, cooler, +3.3 pp
GKA182M285W 285 W 23.00% - 10.8 kg -50 W, lighter, +3.2 pp
GKA182M300W 300 W 23.00% - 16.2 kg -35 W, +3.2 pp, +5 yr warranty
GKA210M320W 320 W 23.00% - 16.2 kg Lighter, +3.2 pp, +5 yr warranty
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +3.2 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +3.2 pp, +5 yr warranty
SV120M.2-320 320 W 19.10% -0.370 18.3 kg -15 W, -0.7 pp
SV120M.5.0-330 330 W 19.60% -0.370 18.8 kg Very close match
SV120M.5(3)-330 330 W 19.50% -0.370 18.9 kg -0.3 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +105 W, cooler, +3.1 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +100 W, cooler, +2.9 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.8 pp, +15 yr warranty

Found 114 panels of the same or similar size to this one, within ±10 mm. See them here Found 224 panels of the same or similar size to this one, within ±25 mm. See them here Found 470 panels of the same or similar size to this one, within ±50 mm. See them here Found 814 panels of the same or similar size to this one, within ±100 mm. See them here

About the SV120M.5(3) series

6 answered

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

Is the Selfa SV120M.5(3) series still available for purchase?
The SV120M.5(3) series has been discontinued by Selfa and replaced by newer, higher-power models. Units may still be found through distributors clearing warehouse stock, but availability is limited and depends on local inventory. The manufacturer's warranty remains valid regardless of discontinuation, so buying from an authorized Polish distributor is still safe.
What does the SV120M.5(3) model designation mean?
The digit after the dot indicates the frame color: "5" denotes the silver-frame version, while the "3" in parentheses refers to the black-frame variant (SV120M.3). Aside from appearance, both variants share identical electrical and structural specifications, so the choice comes down to aesthetic preference relative to the roof covering or ground-mount structure.
What warranty does the Selfa SV120M.5(3) come with, and is it reliable?
Selfa provides a 12-year product warranty and a 25-year linear power output warranty. The manufacturer is headquartered in Poland with an extensive service network, making claims easier compared to panels sourced exclusively from Asia. Despite this series being discontinued, the warranty terms remain valid as originally issued for previously purchased modules.
How do the half-cut cells with 5 busbars in the SV120M.5(3) differ from standard PERC cells?
Half-cut technology splits a standard PERC cell in two, significantly reducing power loss from partial shading, such as from a leaf or chimney, compared to a full-cell module. Additionally, 5 busbars instead of the typical 3-4 improve current collection and increase mechanical resistance to microcracks, resulting in lower failure rates under large temperature swings and snow loads.
What is Selfa's SELF-C coating, and does it actually reduce maintenance?
SELF-C is a proprietary surface coating developed by Selfa that gives the module self-cleaning properties, reducing the adhesion of dust, pollen, and other deposits. In practice, this means less frequent panel washing and smaller performance drops between cleanings, which is especially noticeable in agricultural areas, near roads, or close to trees where soiling accumulates faster than on a typical urban rooftop.
Can the actual power output of the SV120M.5(3) 335 Wp panel be lower than rated?
No, this series carries a positive-only power tolerance, meaning a delivered module is never below the rated 335 Wp and may only be slightly higher. This matters for system design because it eliminates the risk of underestimating total energy yield, a concern investors face with panels rated at negative or symmetric tolerance.
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