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S-Energy Brand review

SL45-72BDI-440Z

440 Wp PERC Bifacial 2500%
ComparePV verdict

Warranty pick, heavy for its output

Rank 11,101 of 14,005
Compare panels Datasheet PDF
Power (Wp)
440
Strong · top 15%
Efficiency (%)
20.24
Weak · bottom 21%
Density (Wp/m²)
202.4
Weak · bottom 21%
Temp (%/°C)
-0.360
Weak · bottom 15%
Weight (kg)
26.5
Weak · 4.5 kg above median
Warranty (yrs)
30
Strong · top 17%

The S-Energy SL45-72BDI series consists of advanced bifacial dual-glass modules that redefine performance standards in harsh environmental conditions. Thanks to the use of double tempered glass instead of a traditional backsheet film, these panels exhibit extreme resistance to the PID phenomenon and degradation caused by moisture or ammonia. The use of bifacial technology allows for generating additional energy from reflected radiation, which is crucial for mounting on bright surfaces or in tracking systems. This construction addresses the issue of installation durability in demanding climates, offering a longer lifespan and stability of parameters over time. These modules are primarily dedicated to investors building utility-scale photovoltaic farms and commercial rooftop installations, where the priority is maximizing yields per square meter. Compared to standard competition, the SL45-72BDI series stands out with a higher fire resistance class and an optimized temperature coefficient, which translates into real gains on hot days. By choosing these panels, you gain the assurance of fire safety and mechanical reliability, making them an ideal solution for projects with a long investment horizon that require uncompromising build quality.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.24% 20.60% Weak · bottom 21% 11,885
Power density 202.4 206.2 Weak · bottom 21% 11,857
Temperature coefficient -0.360 -0.350 Weak · bottom 15% 12,345
Weight per kWp 60.2 53.0 Weak · bottom 11% 12,399
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 · 3 caution
Best for

Commercial and cold-climate.

Not ideal for

Weight-limited structures, hot climates and roofs where every square metre has to count.

Strengths
30 year performance warranty

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

Watch-outs
60.2 kg per kWp

Bottom 11% of the PERC 400-450 W segment, against a median of 53.0.

-0.360 %/°C temperature coefficient

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

202.4 watts per square metre

Bottom 21% of the PERC 400-450 W segment, against a median of 206.2.

Notes from the database
  • At 20.2% efficiency, this panel is on par with typical PERC 400-450W modules
  • Power density of 202.4 W/m² is 3.8 W/m² below PERC 400-450W median (206.2 W/m²) - needs more roof space
  • Temperature coefficient of -0.36%/°C matches the PERC 400-450W median
  • Weight of 26.5 kg is 4.5 kg above PERC 400-450W median (22.0 kg) - verify structural support
  • In the top 85% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 440 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.24 % Weak Segment median 20.60%
Vmpp · Impp 41.70 V · 10.56 A Operating point at max power
Voc · Isc 50.10 V · 11.44 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1038×30 mm · 2.17 m² of roof
Weight 26.5 kg Weak Weak · 4.5 kg above median
Cells 144 · PERC Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.360 %/°C Weak bottom 15% of its segment
Coefficient Voc · Isc -0.290 · 0.050 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 17% · median 25 yrs
End-of-warranty output 85.0 % Equals 374 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
-0.360 %/°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.

Alternatives

All S-Energy panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
S-Energy SL45-72BDI-440Z 440 W 20.24% -0.360 26.5 kg You are here
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +4.3 pp
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg +50 W, cooler, +4.3 pp
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Cooler, lighter, +4.1 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg Cooler, lighter, +4.1 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg Cooler, lighter, +4.1 pp
GK-5-54HG-485M 485 W 24.30% -0.260 21.0 kg Cooler, lighter, +4.1 pp
ZEUS 3.0+ 108 485WP 485 W 24.30% -0.260 24.2 kg +45 W, cooler, +4.1 pp
SL45-72BGI-445S 445 W 20.50% -0.350 24.6 kg Lighter, +0.3 pp, -5 yr warranty
SL45-72BGI-450S 450 W 20.70% -0.350 24.6 kg Lighter, +0.5 pp, -5 yr warranty
SL45-72BGI-455S 455 W 20.90% -0.350 24.6 kg Lighter, +0.7 pp, -5 yr warranty
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +150 W, cooler, +3.6 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +145 W, cooler, +3.4 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +140 W, cooler, +3.3 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +140 W, cooler, +3.2 pp

Found 234 panels of the same or similar size to this one, within ±10 mm. See them here Found 325 panels of the same or similar size to this one, within ±25 mm. See them here Found 352 panels of the same or similar size to this one, within ±50 mm. See them here Found 1158 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty comes with the S-Energy SL45-72BDI solar panels and what does it cover?
S-Energy provides a 12-year product warranty covering defects in materials and workmanship, and a 30-year linear power output warranty. This means the panel must maintain a specified percentage of its rated 455 Wp output for three decades. The dual-glass construction further extends the module's real-world service life beyond standard industry benchmarks, making this series well-suited for long-payback investment projects.
Does the bifacial technology in the S-Energy SL45-72BDI actually increase energy yield, and when does it make sense?
Yes, the bifacial design of the SL45-72BDI allows modules to generate power from both direct irradiance and light reflected off the ground surface. Typical bifacial gain ranges from 5–15%, depending on surface albedo. The highest gains occur over light-colored surfaces such as gravel, concrete, or snow, and in tracker-mounted systems. On standard dark rooftops, the bifacial benefit is minimal.
How do S-Energy SL45-72BDI panels perform on hot days — does high temperature significantly reduce output?
All crystalline silicon panels lose power as temperature rises. The SL45-72BDI series has a power temperature coefficient of approximately -0.35%/°C. At a typical summer cell temperature of 45°C, this translates to roughly a 7% loss compared to the STC-rated 455 Wp. The optimized temperature coefficient in this series is slightly better than budget competitors, delivering measurably higher output during peak summer hours.
Are the S-Energy SL45-72BDI panels resistant to moisture and ammonia — suitable for agricultural or biogas installations?
Yes. The dual-glass construction eliminates the polymer backsheet, removing the primary moisture ingress path into the cell laminate. The SL45-72BDI series demonstrates confirmed ammonia resistance, which is critical near livestock facilities or biogas plants. Unlike standard monofacial modules, there is no backsheet degradation from volatile chemical exposure over time, making these modules a reliable choice for agri-PV projects.
What type of installations are the S-Energy SL45-72BDI modules best suited for — ground-mount farms or commercial rooftops?
The SL45-72BDI series is designed primarily for utility-scale ground-mount farms and large commercial rooftop installations. The 455 Wp rating, 1500 V system voltage compatibility, and bifacial energy harvest maximize output per square meter at scale. For small residential prosumer systems, a smaller-format module is a better fit — the SL45-72BDI is optimized for industrial and utility-scale projects.
Is S-Energy a Tier 1 manufacturer and is it a trustworthy choice for a long-term investment?
S-Energy is a South Korean manufacturer not classified as Tier 1 by Bloomberg NEF. This does not reflect on product quality — Korean production facilities meet stringent manufacturing standards, and the SL45-72BDI carries IEC certifications with dual-glass durability. For long-term projects, it is advisable to include contractual performance guarantees and consider the manufacturer's financial stability as part of your due diligence.
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