--- title: "Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS3MH66BDXXX - Solar Panel Comparison | ComparePV" description: "Compare Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS3MH66BDXXX side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps3mh66bdxxx" image: "https://comparepv.com/og/compare/panels/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps3mh66bdxxx.png" updated: 2026-09-11 --- # Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS3MH66BDXXX RPS3MH66BDXXX leads on the differences that matter The largest is module efficiency: 2.21 pp more efficient. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Renew Photovoltaics RPS2MH72BD555](https://comparepv.com/panel/renew-photovoltaics-rps2mh72bd555) | [Renew Photovoltaics RPS3MH66BDXXX](https://comparepv.com/panel/renew-photovoltaics-rps3mh66bdxxx) | | Manufacturer | Renew Photovoltaics | Renew Photovoltaics | | Power | 555 Wp | 640 Wp | | Efficiency | 21.48 % | 23.69 % | | Technology | PERC | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | RPS2MH72BD555 | RPS3MH66BDXXX | Difference | | --- | --- | --- | --- | | Module efficiency | 21.48 % | 23.69 % | +2.21 pp for RPS3MH66BDXXX | | Rated power | 555 Wp | 640 Wp | +85 W for RPS3MH66BDXXX | | Power density | 214.8 Wp/m² | 236.9 Wp/m² | +22.1 Wp/m² for RPS3MH66BDXXX | | Temperature coefficient | -0.320 %/°C | -0.290 %/°C | +0.030 %/°C for RPS3MH66BDXXX | | Weight per kWp | 58.6 kg/kWp | 52.3 kg/kWp | -6.2 kg/kWp for RPS3MH66BDXXX | | Short-circuit current | 14.13 A | 16.27 A | 2.14 A apart | | Module area | 2.583 m² | 2.701 m² | 0.118 m² apart | | Cell technology | PERC | TOPCon | PERC vs TOPCon | | Cell count | 144 | 132 | 12 cells apart | | Annual degradation | 0.45 %/yr | 0.40 %/yr | -0.05 %/yr for RPS3MH66BDXXX | | Current at max power | 13.51 A | 15.36 A | 1.85 A apart | | Weight | 32.5 kg | 33.5 kg | -1.0 kg for RPS2MH72BD555 | | Dimensions | 2278x1134x30 mm | 2382x1134x30 mm | 2278x1134x30 mm vs 2382x1134x30 mm | ## Every compared parameter | Parameter | RPS2MH72BD555 | RPS3MH66BDXXX | | --- | --- | --- | | Rated power | 555 Wp | 640 Wp | | Module efficiency | 21.48 % | 23.69 % | | Power density | 214.8 Wp/m² | 236.9 Wp/m² | | Open-circuit voltage | 49.80 V | 49.60 V | | Voltage at max power | 41.10 V | 41.70 V | | Short-circuit current | 14.13 A | 16.27 A | | Current at max power | 13.51 A | 15.36 A | | Temperature coefficient | -0.320 %/°C | -0.290 %/°C | | Dimensions | 2278x1134x30 mm | 2382x1134x30 mm | | Module area | 2.583 m² | 2.701 m² | | Weight | 32.5 kg | 33.5 kg | | Weight per kWp | 58.6 kg/kWp | 52.3 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.40 %/yr | | Cell technology | PERC | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, RPS2MH72BD555:** 18,277 kWh - **Cumulative output, RPS3MH66BDXXX:** 21,473 kWh - **Gap:** 3,196 kWh ## Output when hot | Condition | Cell temperature | RPS2MH72BD555 | RPS3MH66BDXXX | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 555 W | 640 W | 100.0% of rated power | | Cool, bright day | 40 °C | 528 W | 612 W | 95.2% of rated power | | Typical summer roof | 55 °C | 502 W | 584 W | 90.4% of rated power | | Hot roof | 70 °C | 475 W | 556 W | 85.6% of rated power | ## Against the whole database | Measure | RPS2MH72BD555 | RPS3MH66BDXXX | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,217 | #612 | 14,129 | RPS3MH66BDXXX leads by 7,605 places | | Power density | #8,099 | #553 | 14,129 | RPS3MH66BDXXX leads by 7,546 places | | Heat behaviour | #8,376 | #2,220 | 14,129 | RPS3MH66BDXXX leads by 6,156 places | | Weight | #11,876 | #5,874 | 14,129 | RPS3MH66BDXXX leads by 6,002 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #6,675 | #1,555 | 14,129 | RPS3MH66BDXXX leads by 5,120 places | ## Questions ### Which panel is better: Renew Photovoltaics RPS2MH72BD555 or Renew Photovoltaics RPS3MH66BDXXX? According to our database: **Renew Photovoltaics RPS3MH66BDXXX** has higher module efficiency (**23.69%** vs **21.48%**); **Renew Photovoltaics RPS3MH66BDXXX** tolerates heat better (temp coeff **-0.290%/°C** vs **-0.320%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Renew Photovoltaics RPS2MH72BD555 and Renew Photovoltaics RPS3MH66BDXXX? **Renew Photovoltaics RPS2MH72BD555** has a module efficiency of **21.48%**, while **Renew Photovoltaics RPS3MH66BDXXX** is **23.69%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Renew Photovoltaics RPS2MH72BD555 use vs Renew Photovoltaics RPS3MH66BDXXX? **Renew Photovoltaics RPS2MH72BD555** uses **PERC** cells; **Renew Photovoltaics RPS3MH66BDXXX** 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 Renew Photovoltaics RPS2MH72BD555 and Renew Photovoltaics RPS3MH66BDXXX? **Renew Photovoltaics RPS2MH72BD555** has a **30 years** power warranty; **Renew Photovoltaics RPS3MH66BDXXX** 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. ### Are Renew Photovoltaics RPS2MH72BD555 and Renew Photovoltaics RPS3MH66BDXXX bifacial panels? Both **Renew Photovoltaics RPS2MH72BD555** and **Renew Photovoltaics RPS3MH66BDXXX** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD560](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd560) - One difference: module efficiency - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD550](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd550) - The same specification on paper - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD545](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd545) - 3 differences, the largest is module efficiency - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD540](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd540) - 3 differences, the largest is module efficiency - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD535](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd535) - 4 differences, the largest is module efficiency - [Renew Photovoltaics RPS2MH72BD555 vs Renew Photovoltaics RPS2MH72BD530](https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps2mh72bd530) - 4 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/renew-photovoltaics-rps2mh72bd555/renew-photovoltaics-rps3mh66bdxxx 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.