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S-Energy Brand review

SL45-72BGI-445S

445 Wp PERC Bifacial 500%
ComparePV verdict

Solid all-round for its segment

Rank 11,395 of 14,005
Compare panels Datasheet PDF
Power (Wp)
445
Strong · top 5%
Efficiency (%)
20.50
Typical · median 20.60%
Density (Wp/m²)
204.7
Typical · median 206.2
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
24.6
Typical · median 22.0 kg
Warranty (yrs)
25
Typical · median 25 yrs

The S-Energy SL45-72BGI series is designed as bifacial modules that effectively utilize reflected light from the ground to enhance performance where traditional panels reach their limits. The glass-glass construction stabilizes the performance of the cells and increases resistance to microcracks, which is important for long-term operation on roofs and in ground-mounted installations. This solution is ideal for investors who want to minimize the risk of performance degradation and maintain predictable energy production over time.

In practice, the SL45-72BGI performs particularly well on bright roofs, membranes, gravel, or when mounted on the ground - anywhere where reflected light can benefit you. The modules feature monocrystalline cells and are designed for demanding environmental conditions. Their high-quality construction makes them suitable for commercial projects and larger prosumer installations. If you are comparing offers, the key advantage of this series is the combination of dual-sided generation with greater structural durability, without compromising the daily performance of the system.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.50% 20.60% Typical 11,308
Power density 204.7 206.2 Typical 11,478
Temperature coefficient -0.350 -0.350 Typical 10,419
Weight per kWp 55.3 53.0 Typical 9,718
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 0 caution
Best for

Residential and commercial.

Notes from the database
  • Efficiency of 20.5% matches the PERC 400-450W median
  • Power density of 204.7 W/m² matches the PERC 400-450W median
  • At -0.35%/°C, hot weather performance is typical for PERC 400-450W panels
  • At 24.6 kg (2.6 kg above PERC 400-450W median of 22.0 kg), requires checking roof load capacity
  • #11308 for efficiency, #10419 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 445 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.50 % Typical Segment median 20.60%
Vmpp · Impp 41.25 V · 10.80 A Operating point at max power
Voc · Isc 49.45 V · 11.48 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1038×40 mm · 2.17 m² of roof
Weight 24.6 kg Typical Typical · median 22.0 kg
Cells 144 · PERC Monocrystalline
Bifaciality 500 % Rear output as a share of front
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.270 · 0.040 %/°C
NOCT 45 °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 85.0 % Equals 354 W guaranteed
Degradation 2.00 → 0.64 % 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
-0.350 %/°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 SL45-72BGI-445S 445 W 20.50% -0.350 24.6 kg You are here
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +50 W, cooler, +4.3 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, +4.0 pp, +5 yr warranty
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg Cooler, +4.0 pp, +5 yr warranty
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Cooler, lighter, +3.8 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg Cooler, +3.8 pp, +5 yr warranty
LR7-54HJD-495M 495 W 24.30% -0.240 23.5 kg +50 W, cooler, +3.8 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg Cooler, +3.8 pp, +5 yr warranty
SL45-72BDI-440Z 440 W 20.24% -0.360 26.5 kg Heavier, -0.3 pp, +5 yr warranty
SL45-72BGI-450S 450 W 20.70% -0.350 24.6 kg Very close match
SL45-72BGI-455S 455 W 20.90% -0.350 24.6 kg +10 W, +0.4 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +145 W, +3.3 pp, +5 yr warranty
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +140 W, +3.1 pp, +5 yr warranty
BGO 580 580 W 23.50% -0.290 26.0 kg +135 W, cooler, +3.0 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +135 W, +2.9 pp, +5 yr warranty

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
Is the S-Energy SL45-72BGI series still available for purchase?
The S-Energy SL45-72BGI series has been discontinued and is no longer actively stocked by distributors. Isolated units may surface from existing warehouse inventory, but for a new installation or system expansion it is advisable to select a currently manufactured bifacial module to ensure panel availability for future replacements.
How does bifacial technology work in the S-Energy SL45-72BGI and when does it actually boost energy yield?
The SL45-72BGI captures irradiance from both the front and rear side. The rear cell uses light reflected from the ground surface (albedo effect). The practical bifacial gain typically ranges from 5 to 20% additional output and is highest in ground-mount systems over light-colored surfaces, white roofing membranes, or gravel. On dark substrates or flush roof mounts the rear-side contribution is negligible.
What warranty does S-Energy provide for the SL45-72BGI panels?
S-Energy offered a 12-year product warranty covering defects in materials and workmanship, and a 25-year linear power output warranty for the SL45-72BGI series. Because the series is discontinued, buyers of remaining stock should verify whether the manufacturer still honors warranty claims for discontinued product lines before committing to a purchase.
What is the peak power rating of the S-Energy SL45-72BGI and what system sizes is it suited for?
The SL45-72BGI modules are rated at 455 Wp under STC conditions. This output level is typical for commercial installations and larger prosumer systems above 10 kWp. The panels are well suited for ground-mount solar farms and large industrial rooftops, where both the module power and the bifacial yield gain can be fully utilized.
Does the PERC cell technology in the S-Energy SL45-72BGI improve performance in overcast conditions?
The monocrystalline PERC cells used in the SL45-72BGI deliver moderately better efficiency under diffuse irradiance compared to standard mono or polycrystalline cells. In Central European climates this translates to improved yield on cloudy days, though the advantage over more recent technologies such as TOPCon or HJT is less pronounced when PERC is the reference point.
Is S-Energy a Tier 1 manufacturer and does that affect financing for an installation using SL45-72BGI panels?
S-Energy (South Korea) does not appear on the BNEF Tier 1 manufacturer list. For installations financed through loans or leasing agreements this can be relevant, as some lenders and insurers require modules from Tier 1 manufacturers as a contractual condition. It is advisable to confirm this requirement with the financing institution or insurer before purchasing.
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