--- title: "S-Energy SE65-78BGJ-585S 585W Solar Panel - Specs & Review | ComparePV" description: "S-Energy SE65-78BGJ-585S 585W solar panel. Specs: 20.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/s-energy-se65-78bgj-585s" updated: 2026-09-11 --- # S-Energy SE65-78BGJ-585S Middle of its segment, short guarantee 6,547 panels in the 485-685 W band, all technologies ## Identity - **Manufacturer:** S-Energy - **Model:** SE65-78BGJ-585S - **Series:** SE65-78BGJ - **Rated power:** 585 W - **Cell technology:** Monocrystalline - **Bifacial:** yes ## How it compares Compared against 485-685 W band, all technologies (6547 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 585 W | 585 W | Typical | | | Module efficiency | 20.90% | 22.26% | Weak - bottom 13% | 10,072 | | Power density | 209.3 | 222.6 | Weak - bottom 14% | 9,998 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 11% | 10,419 | | Weight (kg) | 31.0 kg | 31.0 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 11% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.90% | 22.26% | Weak - bottom 13% | 10,072 | | Power density | 209.3 | 222.6 | Weak - bottom 14% | 9,998 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 11% | 10,419 | | Weight per kWp | 53.0 | 52.8 | Typical | 6,697 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 11% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 11% of the 485-685 W band, against a median of 30 yrs. - **-0.350 %/°C temperature coefficient** - Bottom 11% of the 485-685 W band, against a median of -0.300. - **20.90% module efficiency** - Bottom 13% of the 485-685 W band, against a median of 22.26%. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Owners who want a long output guarantee, hot climates and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 585 W - **Efficiency:** 20.90 % - **Voltage at Pmax (Vmp):** 45.50 V - **Current at Pmax (Imp):** 12.87 A - **Open-circuit voltage (Voc):** 53.70 V - **Short-circuit current (Isc):** 13.63 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.270 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 156 - **Bifacial:** yes - **Bifacial gain:** 5.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 40 mm - **Weight:** 31.0 kg - **Area:** 2.80 m2 - **Power density:** 209.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.54 % - **Output after 30 years:** 482 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10072 of 14005 | | Power density | 9998 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 6697 of 14005 | | Warranty | 9798 of 14005 | ## About this series The S-Energy SE65-78BGJ series are **bifacial** modules with a **glass-glass** construction, designed to maximize energy generation not only from direct sunlight, but also from reflected light. This allows them to effectively utilize typical Polish conditions - bright facades, substrates with light gravel, or snow in winter - which can realistically support production. The use of **monocrystalline** cells in a modern, large-format layout promotes stable operation and high surface efficiency, making it easier to design high-power installations in limited spaces. The SE65-78BGJ also stands out for its **weather resistance** and durable construction, which is valued in installations exposed to wind loads and intensive use. It is a good choice for PV farms, warehouse roofs, industrial buildings, and carports, where energy yield, reliability, and long-term stability are more important than the module price alone. ## Notable figures - Module efficiency of 20.9% is 0.9pp below average for \*\*database\*\* panels (median: 21.8%) - Power density of 209.3 W/m² is 8.8 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - Temperature coefficient of -0.35%/°C is 0.05pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - Weight of 31.0 kg is 4.5 kg above \*\*database\*\* median (26.5 kg) - verify structural support - #10072 for efficiency, #10419 for temperature performance out of 14005 panels ## Questions ### Do S-Energy SE65-78BGJ panels generate power only from the front side, or from the rear as well? The SE65-78BGJ series uses bifacial glass-glass construction, meaning the rear glass is transparent and the back surface of the cells also generates electricity. In practice, on installations with high-albedo surfaces such as white gravel, concrete, or snow, bifacial operation can increase energy yield by several to over ten percent compared to a conventional single-sided module. ### What warranty comes with the S-Energy SE65-78BGJ modules? The manufacturer provides a 12-year product warranty covering workmanship and material defects, plus a 25-year linear power output warranty. The power warranty guarantees the module will retain at least a specified percentage of its rated output after 25 years of operation, giving system owners predictable performance throughout the full project lifetime. ### What types of installations are the 585 Wp S-Energy SE65-78BGJ modules designed for? At a peak power of 585 Wp, the SE65-78BGJ is aimed at commercial and industrial-scale projects: utility and ground-mount solar farms, industrial and warehouse rooftops, and carport structures. The high per-module power rating allows large system capacities to be achieved in limited footprints, which is particularly valuable for systems from several dozen kilowatts upward. ### How does the glass-glass construction of the SE65-78BGJ differ from a conventional backsheet module? Standard modules use a polymer backsheet, whereas the SE65-78BGJ replaces it with a tempered glass layer. This provides greater mechanical strength, superior moisture protection, and higher certified wind and snow load ratings. Glass-glass construction is also more resistant to PID degradation and delivers more stable long-term performance in the variable climate conditions typical of Central Europe. ### Is S-Energy a Tier 1 manufacturer, and can its modules be trusted for larger investments? S-Energy is a South Korean manufacturer with extensive experience in the PV industry, though it is not currently listed on the Bloomberg NEF Tier 1 bankability ranking. This does not imply poor quality — the company holds recognized certifications (IEC, MCS) and supplies modules for commercial installations worldwide. For larger projects, it is advisable to verify the manufacturer's current financial standing and confirm the warranty service process available in your market. ### Is the S-Energy SE65-78BGJ series still in production and available to purchase? Yes, the SE65-78BGJ series is currently in production and has not been discontinued. Modules are available through PV equipment distributors. Before placing a larger order, it is worth confirming stock availability and lead times with your supplier, especially when planning solar farms with extended construction schedules. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/se65-78bgj-xxxs-230821-2644ca033219.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.7 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +50 W, cooler, +3.7 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +3.5 pp | | [S-Energy SE65-78BGJ-575S](https://comparepv.com/panel/s-energy-se65-78bgj-575s) | 575 W | -10 W, -0.4 pp | | [S-Energy SL65-78BGJ-580S](https://comparepv.com/panel/s-energy-sl65-78bgj-580s) | 580 W | Very close match | | [S-Energy SL65-78BGJ-590S](https://comparepv.com/panel/s-energy-sl65-78bgj-590s) | 590 W | +0.2 pp | | [S-Energy SL65-78BGJ-595S](https://comparepv.com/panel/s-energy-sl65-78bgj-595s) | 595 W | +10 W, +0.4 pp | | [S-Energy SL65-78BGJ-600S](https://comparepv.com/panel/s-energy-sl65-78bgj-600s) | 600 W | +15 W, +0.6 pp | | [S-Energy SL65-78TDP-605R](https://comparepv.com/panel/s-energy-sl65-78tdp-605r) | 605 W | Cooler, +0.8 pp, +5 yr warranty | | [S-Energy SL65-78TDP-610R](https://comparepv.com/panel/s-energy-sl65-78tdp-610r) | 610 W | Cooler, +0.9 pp, +5 yr warranty | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +95 W, cooler, +4.3 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +90 W, cooler, +4.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +115 W, cooler, +4.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +110 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/s-energy-se65-78bgj-585s Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.