--- title: "Bisol BGO 570 vs Bisol BGO 580 - Solar Panel Comparison | ComparePV" description: "Compare Bisol BGO 570 vs Bisol BGO 580 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/bisol-bgo-570/bisol-bgo-580" updated: 2026-09-11 --- # Bisol BGO 570 vs Bisol BGO 580 580 leads on the differences that matter The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Bisol BGO 570](https://comparepv.com/panel/bisol-bgo-570) | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | | Manufacturer | Bisol | Bisol | | Power | 570 Wp | 580 Wp | | Efficiency | 23.10 % | 23.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 570 | 580 | Difference | | --- | --- | --- | --- | | Module efficiency | 23.10 % | 23.50 % | +0.40 pp for 580 | | Power density | 230.9 Wp/m² | 234.9 Wp/m² | +4.1 Wp/m² for 580 | | Rated power | 570 Wp | 580 Wp | +10 W for 580 | ## Every compared parameter | Parameter | 570 | 580 | | --- | --- | --- | | Rated power | 570 Wp | 580 Wp | | Module efficiency | 23.10 % | 23.50 % | | Power density | 230.9 Wp/m² | 234.9 Wp/m² | | Open-circuit voltage | 44.70 V | 45.20 V | | Voltage at max power | 37.50 V | 37.70 V | | Short-circuit current | 16.10 A | 16.20 A | | Current at max power | 15.20 A | 15.40 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2177x1134x35 mm | 2177x1134x35 mm | | Module area | 2.469 m² | 2.469 m² | | Weight | 26.0 kg | 26.0 kg | | Weight per kWp | 45.6 kg/kWp | 44.8 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.31 %/yr | 0.31 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 120 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 570:** 19,392 kWh - **Cumulative output, 580:** 19,733 kWh - **Gap:** 341 kWh ## Output when hot | Condition | Cell temperature | 570 | 580 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 570 W | 580 W | 100.0% of rated power | | Cool, bright day | 40 °C | 545 W | 555 W | 95.7% of rated power | | Typical summer roof | 55 °C | 520 W | 530 W | 91.3% of rated power | | Hot roof | 70 °C | 496 W | 504 W | 87.0% of rated power | ## Against the whole database | Measure | 570 | 580 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,570 | #716 | 14,005 | 580 leads by 854 places | | Power density | #1,637 | #848 | 14,005 | 580 leads by 789 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #777 | #542 | 14,005 | 580 leads by 235 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,703 | #1,317 | 14,005 | 580 leads by 386 places | ## Questions ### Which panel is better: Bisol BGO 570 or Bisol BGO 580? According to our database: **Bisol BGO 580** has higher module efficiency (**23.50%** vs **23.10%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Bisol BGO 570 and Bisol BGO 580? **Bisol BGO 570** has a module efficiency of **23.10%**, while **Bisol BGO 580** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Bisol BGO 570 use vs Bisol BGO 580? **Bisol BGO 570** uses **TOPCon** cells; **Bisol BGO 580** uses **TOPCon**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Bisol BGO 570 and Bisol BGO 580? **Bisol BGO 570** has a **30 years** power warranty; **Bisol BGO 580** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ## Related comparisons - [Bisol BGO 570 vs Bisol BGO 560](https://comparepv.com/compare/bisol-bgo-570/bisol-bgo-560) - 3 differences, the largest is module efficiency - [Bisol BGO 570 vs Bisol BBO 520](https://comparepv.com/compare/bisol-bgo-570/bisol-bbo-520) - 7 differences, the largest is rated power - [Bisol BGO 570 vs Bisol BBO 510](https://comparepv.com/compare/bisol-bgo-570/bisol-bbo-510) - 10 differences, the largest is rated power - [Bisol BGO 570 vs Bisol BBO 500](https://comparepv.com/compare/bisol-bgo-570/bisol-bbo-500) - 10 differences, the largest is module efficiency - [Bisol BGO 570 vs Bisol BDO 460](https://comparepv.com/compare/bisol-bgo-570/bisol-bdo-460) - 7 differences, the largest is rated power - [Bisol BGO 570 vs Bisol BDO 450](https://comparepv.com/compare/bisol-bgo-570/bisol-bdo-450) - 10 differences, the largest is rated power --- Source: https://comparepv.com/compare/bisol-bgo-570/bisol-bgo-580 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.