--- title: "Mysolar USA MS720N-HJTGB vs Sharp GSD8K66H-735WT - Solar Panel Comparison | ComparePV" description: "Compare Mysolar USA MS720N-HJTGB vs Sharp GSD8K66H-735WT side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/sharp-gsd8k66h-735wt" updated: 2026-09-11 --- # Mysolar USA MS720N-HJTGB vs Sharp GSD8K66H-735WT 5 differences, and they point both ways The largest is module efficiency: 0.49 pp more efficient. 14 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Mysolar USA MS720N-HJTGB](https://comparepv.com/panel/mysolar-usa-ms720n-hjtgb) | [Sharp GSD8K66H-735WT](https://comparepv.com/panel/sharp-gsd8k66h-735wt) | | Manufacturer | Mysolar USA | Sharp | | Power | 720 Wp | 735 Wp | | Efficiency | 23.17 % | 23.66 % | | Technology | HJT | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | MS720N-HJTGB | GSD8K66H-735WT | Difference | | --- | --- | --- | --- | | Module efficiency | 23.17 % | 23.66 % | +0.49 pp for GSD8K66H-735WT | | Product warranty | 30 yrs | 25 yrs | +5 yrs for MS720N-HJTGB | | Annual degradation | 0.25 %/yr | 0.35 %/yr | -0.10 %/yr for MS720N-HJTGB | | Power density | 231.8 Wp/m² | 236.6 Wp/m² | +4.8 Wp/m² for GSD8K66H-735WT | | Rated power | 720 Wp | 735 Wp | +15 W for GSD8K66H-735WT | ## Every compared parameter | Parameter | MS720N-HJTGB | GSD8K66H-735WT | | --- | --- | --- | | Rated power | 720 Wp | 735 Wp | | Module efficiency | 23.17 % | 23.66 % | | Power density | 231.8 Wp/m² | 236.6 Wp/m² | | Open-circuit voltage | 50.75 V | 51.50 V | | Voltage at max power | 42.70 V | 43.60 V | | Short-circuit current | 17.67 A | 17.72 A | | Current at max power | 16.87 A | 16.87 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 38.8 kg | 39.0 kg | | Weight per kWp | 53.9 kg/kWp | 53.1 kg/kWp | | Product warranty | 30 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.25 %/yr | 0.35 %/yr | | Cell technology | HJT | HJT | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.260 %/°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, MS720N-HJTGB:** 24,721 kWh - **Cumulative output, GSD8K66H-735WT:** 24,853 kWh - **Gap:** 132 kWh ## Output when hot | Condition | Cell temperature | MS720N-HJTGB | GSD8K66H-735WT | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 720 W | 735 W | 100.0% of rated power | | Cool, bright day | 40 °C | 692 W | 706 W | 96.1% of rated power | | Typical summer roof | 55 °C | 664 W | 678 W | 92.2% of rated power | | Hot roof | 70 °C | 636 W | 649 W | 88.3% of rated power | ## Against the whole database | Measure | MS720N-HJTGB | GSD8K66H-735WT | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,473 | #602 | 14,005 | GSD8K66H-735WT leads by 871 places | | Power density | #1,347 | #582 | 14,005 | GSD8K66H-735WT leads by 765 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #8,017 | #6,818 | 14,005 | GSD8K66H-735WT leads by 1,199 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #27 | #21 | 14,005 | GSD8K66H-735WT leads by 6 places | ## Questions ### Which panel is better: Mysolar USA MS720N-HJTGB or Sharp GSD8K66H-735WT? According to our database: **Sharp GSD8K66H-735WT** has higher module efficiency (**23.66%** vs **23.17%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Mysolar USA MS720N-HJTGB and Sharp GSD8K66H-735WT? **Mysolar USA MS720N-HJTGB** has a module efficiency of **23.17%**, while **Sharp GSD8K66H-735WT** is **23.66%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Mysolar USA MS720N-HJTGB use vs Sharp GSD8K66H-735WT? **Mysolar USA MS720N-HJTGB** uses **HJT** cells; **Sharp GSD8K66H-735WT** 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 Mysolar USA MS720N-HJTGB and Sharp GSD8K66H-735WT? **Mysolar USA MS720N-HJTGB** has a **30 years** power warranty; **Sharp GSD8K66H-735WT** 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 Mysolar USA MS720N-HJTGB and Sharp GSD8K66H-735WT bifacial panels? Both **Mysolar USA MS720N-HJTGB** and **Sharp GSD8K66H-735WT** 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 - [Mysolar USA MS720N-HJTGB vs Mysolar USA MS715N-HJTGB](https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/mysolar-usa-ms715n-hjtgb) - The same specification on paper - [Mysolar USA MS720N-HJTGB vs Mysolar USA MS710N-HJTGB](https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/mysolar-usa-ms710n-hjtgb) - 3 differences, the largest is module efficiency - [Mysolar USA MS720N-HJTGB vs Mysolar USA MS705N-HJTGB](https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/mysolar-usa-ms705n-hjtgb) - 3 differences, the largest is module efficiency - [Mysolar USA MS720N-HJTGB vs Mysolar USA MS700N-HJTGB](https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/mysolar-usa-ms700n-hjtgb) - 3 differences, the largest is module efficiency - [Sharp GSD8K66H-735WT vs Sharp GSD8K66H-740WT](https://comparepv.com/compare/sharp-gsd8k66h-735wt/sharp-gsd8k66h-740wt) - The same specification on paper - [Sharp GSD8K66H-735WT vs Sharp GSD8K66H-730WT](https://comparepv.com/compare/sharp-gsd8k66h-735wt/sharp-gsd8k66h-730wt) - The same specification on paper --- Source: https://comparepv.com/compare/mysolar-usa-ms720n-hjtgb/sharp-gsd8k66h-735wt 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.