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S-Energy Brand review

SL65-72BGJ-540S

540 Wp PERC Bifacial 500%
ComparePV verdict

Middle of its segment, short guarantee

Rank 8,932 of 14,005
Compare panels Datasheet PDF
Power (Wp)
540
Typical for its class
Efficiency (%)
20.90
Typical · median 20.90%
Density (Wp/m²)
209.0
Typical · median 209.0
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
28.5
Typical · median 28.4 kg
Warranty (yrs)
25
Weak · bottom 23%

The S-Energy SL65-72BGJ series is designed for installations where high energy production is crucial, even under less-than-ideal conditions. The use of a bifacial construction allows for better utilization of light reflected from the ground, which effectively supports energy generation on flat roofs, ground-mounted structures, and PV farms. The monocrystalline modules with half-cut cell technology minimize losses at connections and improve performance in partially shaded conditions, such as those caused by chimneys, trees, or railings.

Compared to many competing panels, the SL65-72BGJ stands out due to its rigid glass-glass construction, which better withstands mechanical loads and material aging over the long term. An additional advantage is low temperature dependence on power output, which ensures stable performance during the summer months. This makes it a sensible choice for investors seeking durability, predictable energy yields, and modules for both prosumer and commercial projects.

Ranking

706 panels in the segment PERC 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.90% 20.90% Typical 10,072
Power density 209.0 209.0 Typical 10,100
Temperature coefficient -0.350 -0.350 Typical 10,419
Weight per kWp 52.8 53.0 Typical 6,450
Performance warranty 25 yrs 30 yrs Weak · bottom 23% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 1 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Watch-outs
25 year performance warranty

Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs.

Notes from the database
  • At 20.9% efficiency, this panel is on par with typical PERC 500-550W modules
  • Power density of 209.0 W/m² matches the PERC 500-550W median
  • At -0.35%/°C, hot weather performance is typical for PERC 500-550W panels
  • Ranked #10072 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 540 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.90 % Typical Segment median 20.90%
Vmpp · Impp 41.30 V · 13.08 A Operating point at max power
Voc · Isc 49.60 V · 13.85 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×35 mm · 2.58 m² of roof
Weight 28.5 kg Typical Typical · median 28.4 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 Weak bottom 23% · median 30 yrs
End-of-warranty output 85.0 % Equals 445 W guaranteed
Degradation 2.00 → 0.54 % 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 SL65-72BGJ-540S 540 W 20.90% -0.350 28.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +4.1 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.9 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.9 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +3.8 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.7 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.6 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +3.6 pp
SL65-72BDJ-525Z 525 W 20.32% -0.350 31.5 kg Heavier, -0.6 pp, +5 yr warranty
SL65-72BDJ-530R 530 W 20.53% -0.350 32.0 kg Heavier, -0.4 pp, +5 yr warranty
SL65-72BDJ-530Z 530 W 20.52% -0.350 31.5 kg Heavier, -0.4 pp, +5 yr warranty
SE65-72BGJ-535S 535 W 20.70% -0.350 28.5 kg Very close match
SL65-72BDJ-535R 535 W 20.73% -0.350 32.0 kg Heavier, +5 yr warranty
SL65-72BDJ-540R 540 W 20.92% -0.350 32.0 kg Heavier, +5 yr warranty
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +110 W, cooler, +4.3 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +105 W, cooler, +4.1 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +100 W, cooler, +3.9 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 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Are S-Energy SL65-72BGJ panels suitable for ground-mounted systems and utility-scale PV farms?
Yes, the SL65-72BGJ series is well-suited for ground-mounted systems and solar farms. The bifacial construction captures light reflected from the ground surface, which under optimal conditions — bright albedo surface and correct tilt angle — can boost real-world yield by several percentage points compared to a monofacial module. With a peak power of up to 550 Wp, the series also allows higher installed capacity on the same footprint.
What warranty does the S-Energy SL65-72BGJ solar panel come with?
S-Energy provides a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power warranty guaranteeing at least 80.7% of nominal output after 25 years. It is worth noting that S-Energy is not currently listed on the BNEF Tier-1 index, which is a relevant factor when assessing the manufacturer's ability to honor a long-term power warranty over a 25-year period.
What does bifacial mean on the SL65-72BGJ, and is it worth it on a standard pitched roof?
Bifacial means the panel generates electricity from both the front and rear sides. On a pitched roof where the back of the module sits close to the roof surface, rear-side gain is minimal — typically below 5%. The bifacial benefit is most significant on flat roofs with a light-colored membrane, ground-mounted systems with high-albedo ground cover, or elevated tracker installations. On a conventional pitched roof, the primary advantage of this model is the durability of the glass-glass construction rather than the bifacial effect itself.
How do the half-cut PERC cells in the SL65-72BGJ help with partial shading from chimneys or trees?
Half-cut cells reduce internal resistance and electrically isolate shaded cell segments from the rest of the module. In practice, shading from a chimney, railing, or tree branches causes a smaller power drop across the entire panel compared to full-size cells. PERC technology further improves minority carrier collection efficiency. Together, these features deliver better performance under partial shading conditions typical of urban and residential rooftop installations.
Does the glass-glass design of the S-Energy SL65-72BGJ translate to a longer service life?
Yes. Replacing the rear backsheet with tempered glass significantly increases the module's mechanical resistance to snow loads, wind, and hail, while also limiting moisture ingress and laminate degradation. The result is slower power degradation and a more predictable output curve over the full 25-year warranty period. The panel weighs approximately 31.5 kg — heavier than a backsheet equivalent — so mounting structures must be engineered accordingly.
Is S-Energy a reputable manufacturer and is its 25-year power warranty reliable?
S-Energy is a South Korean manufacturer headquartered in Seongnam, Gyeonggi-do, operating since 2001 with roots in Samsung's PV division. The company runs its own factory in South Korea with an annual production capacity of approximately 500 MW. It is not currently listed on the BNEF Tier-1 index, so buyers should apply additional due diligence when evaluating the long-term enforceability of its 25-year power warranty. For mid-scale residential and commercial projects it represents a competitive price-to-quality option.
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