--- title: "Bisol BGO 570 570W Solar Panel - Specs & Review | ComparePV" description: "Bisol BGO 570 570W solar panel. Specs: 23.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/bisol-bgo-570" updated: 2026-09-11 --- # Bisol BGO 570 Efficiency leader, no clear weak spot 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Bisol - **Model:** BGO 570 - **Series:** Duplex Deflect - **Rated power:** 570 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 570 W | 580 W | Typical | | | Module efficiency | 23.10% | 22.44% | Strong - top 2% | 1,570 | | Power density | 230.9 | 224.4 | Strong - top 2% | 1,637 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 26.0 kg | 31.2 kg | Strong - top 7% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.10% | 22.44% | Strong - top 2% | 1,570 | | Power density | 230.9 | 224.4 | Strong - top 2% | 1,637 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 45.6 | 53.8 | Strong - top 7% | 777 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.10% module efficiency** - Top 2% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 1,570th in the whole database. - **230.9 watts per square metre** - Top 2% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 1,637th in the whole database. - **45.6 kg per kWp** - Top 7% of the TOPCon 550-600 W segment, against a median of 53.8. Ranked 777th in the whole database. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 570 W - **Efficiency:** 23.10 % - **Voltage at Pmax (Vmp):** 37.50 V - **Current at Pmax (Imp):** 15.20 A - **Open-circuit voltage (Voc):** 44.70 V - **Short-circuit current (Isc):** 16.10 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 ### Physical - **Length:** 2177 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 26.0 kg - **Area:** 2.47 m2 - **Power density:** 230.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.31 % - **Output after 30 years:** 513 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1570 of 14005 | | Power density | 1637 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 777 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Proprietary Deflect Anti-Reflective Glass Technology** - Bisol's proprietary Deflect anti-reflective glass reduces luminance to levels safe for the surrounding environment — a feature absent in peer comparables (Emmvee Titanium, ZNShine ZXM7). This is especially relevant for installations near roads, airports, and urban areas, where glare can pose safety hazards or trigger neighbor complaints. - **Module Efficiency of 22.7–23.5% Outperforms Peers** - Peak efficiency of 23.5% exceeds all three peer comparables: Emmvee Titanium Duo and Titanium Clear (22.45%) and ZNShine ZXM7-UHLD144 (22.44%), even though those series are bifacial and N-type. The higher energy yield per m² of roof area translates into superior performance in space-constrained installations. - **30-Year Linear Power Warranty at ≥90% Output** - Bisol guarantees retention of at least 90% of rated output power in year 30 of operation. The industry standard for the 560–580 Wp segment is typically 80–84.8% after 25 years (e.g., JA Solar, LONGi). The combination of a 25-year product warranty and a 30-year power warranty at 90% significantly exceeds the market median. - **100% EU Manufacturing, PFAS-Free** - All modules are designed and manufactured in Slovenia (since 2004), ensuring compliance with European environmental standards, consistent quality control, and the absence of PFAS substances. This is a key advantage for public-sector investors, ESG-driven procurement, and tenders requiring an EU carbon footprint. Peer comparables (Emmvee – India, ZNShine – China) do not offer European manufacturing. - **Mechanical Resilience and Fire Class 1 Certification** - Verified snow load rating of 5,400 Pa, hail resistance, Fire Class 1 certification, and certified ammonia resistance. Freedom from PID and LETID degradation ensures stable energy production throughout the module's operational lifetime — critical for industrial and agricultural installations. ## Cons - **Not Listed on BNEF Tier 1** - Bisol does not appear on the BloombergNEF Tier 1 list (as of Q1 2026), due to the bankability criterion requiring a minimum of six projects >10 MW financed by independent commercial banks within a 24-month period. Although Bisol contests BNEF's methodology and references TÜV/KIWA PVEL certifications, the absence of Tier 1 status may be an obstacle when securing bank financing for larger commercial projects or PPAs. - **Monofacial Design at a Premium Price Point** - The series is monofacial (is\_bifacial: false), whereas direct peer comparables — Emmvee Titanium Duo (glass-glass) and Emmvee Titanium Clear (glass-transparent backsheet) — offer bifacial capability at the same 580 Wp power class and a comparable efficiency of 22.45%. In ground-mount and flat-roof installations, bifacial modules deliver a real energy yield bonus of 5–15%, which may tip the balance in an LCOE analysis. ## About this series The **BISOL Duplex Deflect BGO** series stands out from the competition primarily due to its proprietary **Deflect anti-reflective glass** technology, which reduces luminance to a safe level - this is particularly important in areas where reflected sunlight could be a problem for neighbors, road users, or people using nearby facilities. Modules built with **half-cut monocrystalline** cells ensure stable energy generation even in partially shaded conditions, minimizing losses due to uneven sunlight exposure. The entire product is **designed and manufactured 100% in the European Union**, guaranteeing consistent quality, compliance with European environmental standards, and the absence of PFAS substances. The series offers a **30-year linear warranty** with 90% of the original output maintained - a level significantly exceeding industry standards. High resistance to snow loads and hail, as well as certified fire resistance class 1, make the modules suitable for both residential rooftop installations and demanding commercial projects. The absence of degradation caused by PID and LETID effects results in predictable and stable energy production throughout the lifespan. ## Notable figures - 23.1% module efficiency - 0.7pp better than the \*\*TOPCon 550-600W\*\* median of 22.4% - Power density of 230.9 W/m² packs 6.5 W/m² more into the same footprint vs \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - Weight of 26.0 kg (5.2 kg below \*\*TOPCon 550-600W\*\* median of 31.2 kg) allows easier transport and roof mounting - Ranked #1570 out of 14005 panels for efficiency in the database ## Questions ### What is the Deflect glass technology used in BISOL Duplex Deflect BGO panels, and who is it intended for? Deflect glass is BISOL's proprietary anti-reflective coating that reduces the luminance of reflected sunlight to a safe level. The solution is particularly valuable for installations near roads, airports, railway lines, public buildings, and densely populated residential areas, where intense glare can pose a safety hazard or a significant nuisance. This technology was developed exclusively by the manufacturer and is not commonly found in standard PV modules. ### What warranty is offered on BISOL Duplex Deflect BGO panels, and what does it cover? The BGO series comes with a 25-year product warranty covering material and workmanship defects, as well as a 30-year linear power output warranty under which the manufacturer guarantees that the module will retain at least 90% of its rated output power throughout the entire warranty period. These terms are significantly more favorable than the 10–12-year product warranties and 25-year power warranties typically offered by many competing manufacturers. ### Are BISOL Duplex Deflect BGO panels manufactured in Europe? Yes, the Duplex Deflect BGO series is designed and manufactured 100% within the European Union, at BISOL's production facilities located in Slovenia. This ensures compliance with European environmental standards, the absence of PFAS substances, and full component traceability. For investors and installers, it also means easier access to warranty services without the need to engage with manufacturers outside the EU. ### What is the maximum power output of the BISOL Duplex Deflect BGO panel, and how many cells does the module contain? The highest-power variant in the BGO series reaches 580 Wp. The module is built with 120 monocrystalline half-cut cells, which translates into high efficiency and improved resistance to partial shading compared to conventional full-format cells. When one section of the panel is shaded, power losses are significantly reduced because each half of the module operates independently. ### Are BISOL Duplex Deflect BGO panels suitable for harsh weather conditions, including hail and heavy snow loads? Yes, the Duplex Deflect BGO series carries certified resistance to hail impact and high snow loads, making it suitable for both residential rooftop installations and demanding commercial projects in alpine regions or severe climates. In addition, the modules have achieved certified fire resistance Class 1, which is particularly important for rooftop installations. ### Do BISOL Duplex Deflect BGO panels suffer power loss due to PID or LETID effects? No. The Duplex Deflect BGO series is resistant to both PID (Potential Induced Degradation) and LETID (Light and Elevated Temperature Induced Degradation) — two of the primary accelerated degradation mechanisms affecting photovoltaic cells. This means that energy production remains predictable and stable throughout the full 30-year operational lifetime, with no unexpected power drops attributable to these phenomena. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/BISOL_Duplex_BGO_Deflect_EN-14862b4e961f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -10 W, cooler, +1.7 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -15 W, cooler, +1.5 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +1.3 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | -30 W, cooler, +1.3 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | -30 W, cooler, +1.3 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | -25 W, cooler, +1.2 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | -25 W, cooler, +1.1 pp | | [Bisol BGO 560](https://comparepv.com/panel/bisol-bgo-560) | 560 W | -10 W, -0.4 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +10 W, +0.4 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +20 W, hotter, +0.7 pp | | [Renewsys DESERV Extreme 144X-610](https://comparepv.com/panel/renewsys-deserv-extreme-144x-610) | 610 W | +40 W, heavier, +0.5 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +15 W, hotter, +0.5 pp | | [Renewsys DESERV Extreme 144X-605](https://comparepv.com/panel/renewsys-deserv-extreme-144x-605) | 605 W | +35 W, heavier, +0.3 pp | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +10 W, hotter, +0.3 pp | --- Source: https://comparepv.com/panel/bisol-bgo-570 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.