--- title: "Recom RCM-725-8DBNM vs Sharp GSD8K66H-740WT - Solar Panel Comparison | ComparePV" description: "Compare Recom RCM-725-8DBNM vs Sharp GSD8K66H-740WT side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/recom-rcm-725-8dbnm/sharp-gsd8k66h-740wt" updated: 2026-09-11 --- # Recom RCM-725-8DBNM vs Sharp GSD8K66H-740WT GSD8K66H-740WT leads on the differences that matter The largest is temperature coefficient: 0.030 %/°C better in heat. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Recom RCM-725-8DBNM](https://comparepv.com/panel/recom-rcm-725-8dbnm) | [Sharp GSD8K66H-740WT](https://comparepv.com/panel/sharp-gsd8k66h-740wt) | | Manufacturer | Recom | Sharp | | Power | 725 Wp | 740 Wp | | Efficiency | 23.30 % | 23.82 % | | Technology | TOPCon | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | RCM-725-8DBNM | GSD8K66H-740WT | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | +0.030 %/°C for GSD8K66H-740WT | | Module efficiency | 23.30 % | 23.82 % | +0.52 pp for GSD8K66H-740WT | | Product warranty | 30 yrs | 25 yrs | +5 yrs for RCM-725-8DBNM | | Power density | 233.4 Wp/m² | 238.2 Wp/m² | +4.8 Wp/m² for GSD8K66H-740WT | | Rated power | 725 Wp | 740 Wp | +15 W for GSD8K66H-740WT | | Cell technology | TOPCon | HJT | TOPCon vs HJT | | Open-circuit voltage | 49.41 V | 51.70 V | 2.29 V apart | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for GSD8K66H-740WT | | Weight | 37.8 kg | 39.0 kg | -1.2 kg for RCM-725-8DBNM | | Short-circuit current | 18.64 A | 17.76 A | 0.88 A apart | | Voltage at max power | 41.27 V | 43.80 V | 2.53 V apart | | Dimensions | 2384x1303x33 mm | 2384x1303x35 mm | 2384x1303x33 mm vs 2384x1303x35 mm | | Current at max power | 17.57 A | 16.91 A | 0.66 A apart | ## Every compared parameter | Parameter | RCM-725-8DBNM | GSD8K66H-740WT | | --- | --- | --- | | Rated power | 725 Wp | 740 Wp | | Module efficiency | 23.30 % | 23.82 % | | Power density | 233.4 Wp/m² | 238.2 Wp/m² | | Open-circuit voltage | 49.41 V | 51.70 V | | Voltage at max power | 41.27 V | 43.80 V | | Short-circuit current | 18.64 A | 17.76 A | | Current at max power | 17.57 A | 16.91 A | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.8 kg | 39.0 kg | | Weight per kWp | 52.1 kg/kWp | 52.7 kg/kWp | | Product warranty | 30 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | TOPCon | HJT | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, RCM-725-8DBNM:** 24,325 kWh - **Cumulative output, GSD8K66H-740WT:** 25,022 kWh - **Gap:** 697 kWh ## Output when hot | Condition | Cell temperature | RCM-725-8DBNM | GSD8K66H-740WT | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 725 W | 740 W | 100.0% of rated power | | Cool, bright day | 40 °C | 693 W | 711 W | 95.7% of rated power | | Typical summer roof | 55 °C | 662 W | 682 W | 91.3% of rated power | | Hot roof | 70 °C | 630 W | 653 W | 87.0% of rated power | ## Against the whole database | Measure | RCM-725-8DBNM | GSD8K66H-740WT | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #418 | 14,005 | GSD8K66H-740WT leads by 599 places | | Power density | #936 | #431 | 14,005 | GSD8K66H-740WT leads by 505 places | | Heat behaviour | #2,165 | #511 | 14,005 | GSD8K66H-740WT leads by 1,654 places | | Weight | #5,609 | #6,344 | 14,005 | RCM-725-8DBNM leads by 735 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #14 | #12 | 14,005 | GSD8K66H-740WT leads by 2 places | ## Questions ### Which panel is better: Recom RCM-725-8DBNM or Sharp GSD8K66H-740WT? According to our database: **Sharp GSD8K66H-740WT** has higher module efficiency (**23.82%** vs **23.30%**); **Sharp GSD8K66H-740WT** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Recom RCM-725-8DBNM and Sharp GSD8K66H-740WT? **Recom RCM-725-8DBNM** has a module efficiency of **23.30%**, while **Sharp GSD8K66H-740WT** is **23.82%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Recom RCM-725-8DBNM use vs Sharp GSD8K66H-740WT? **Recom RCM-725-8DBNM** uses **TOPCon** cells; **Sharp GSD8K66H-740WT** uses **HJT**. 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 Recom RCM-725-8DBNM and Sharp GSD8K66H-740WT? **Recom RCM-725-8DBNM** has a **30 years** power warranty; **Sharp GSD8K66H-740WT** 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 Recom RCM-725-8DBNM and Sharp GSD8K66H-740WT bifacial panels? Both **Recom RCM-725-8DBNM** and **Sharp GSD8K66H-740WT** 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 - [Recom RCM-725-8DBNM vs Recom RCM-730-8DBNM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-730-8dbnm) - One difference: module efficiency - [Recom RCM-725-8DBNM vs Recom RCM-720-8DBNM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-720-8dbnm) - The same specification on paper - [Recom RCM-725-8DBNM vs Recom RCM-715-8DBNM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-715-8dbnm) - 3 differences, the largest is module efficiency - [Recom RCM-725-8DBNM vs Recom RCM-715-8NM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-715-8nm) - 8 differences, the largest is weight - [Recom RCM-725-8DBNM vs Recom RCM-710-8DBNM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-710-8dbnm) - 3 differences, the largest is module efficiency - [Recom RCM-725-8DBNM vs Recom RCM-710-8NM](https://comparepv.com/compare/recom-rcm-725-8dbnm/recom-rcm-710-8nm) - 8 differences, the largest is weight --- Source: https://comparepv.com/compare/recom-rcm-725-8dbnm/sharp-gsd8k66h-740wt 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.