--- title: "Sharp GSD8K66H-715WT vs Sharp GSD8K66H-730WT - Solar Panel Comparison | ComparePV" description: "Compare Sharp GSD8K66H-715WT vs Sharp GSD8K66H-730WT side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-730wt" updated: 2026-09-11 --- # Sharp GSD8K66H-715WT vs Sharp GSD8K66H-730WT 730WT leads on the differences that matter The largest is module efficiency: 0.48 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Sharp GSD8K66H-715WT](https://comparepv.com/panel/sharp-gsd8k66h-715wt) | [Sharp GSD8K66H-730WT](https://comparepv.com/panel/sharp-gsd8k66h-730wt) | | Manufacturer | Sharp | Sharp | | Power | 715 Wp | 730 Wp | | Efficiency | 23.02 % | 23.50 % | | Technology | HJT | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 715WT | 730WT | Difference | | --- | --- | --- | --- | | Module efficiency | 23.02 % | 23.50 % | +0.48 pp for 730WT | | Power density | 230.2 Wp/m² | 235.0 Wp/m² | +4.8 Wp/m² for 730WT | | Rated power | 715 Wp | 730 Wp | +15 W for 730WT | ## Every compared parameter | Parameter | 715WT | 730WT | | --- | --- | --- | | Rated power | 715 Wp | 730 Wp | | Module efficiency | 23.02 % | 23.50 % | | Power density | 230.2 Wp/m² | 235.0 Wp/m² | | Open-circuit voltage | 50.70 V | 51.30 V | | Voltage at max power | 42.80 V | 43.40 V | | Short-circuit current | 17.56 A | 17.68 A | | Current at max power | 16.71 A | 16.83 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 39.0 kg | 39.0 kg | | Weight per kWp | 54.5 kg/kWp | 53.4 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | HJT | 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 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, 715WT:** 24,176 kWh - **Cumulative output, 730WT:** 24,683 kWh - **Gap:** 507 kWh ## Output when hot | Condition | Cell temperature | 715WT | 730WT | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 715 W | 730 W | 100.0% of rated power | | Cool, bright day | 40 °C | 687 W | 702 W | 96.1% of rated power | | Typical summer roof | 55 °C | 659 W | 673 W | 92.2% of rated power | | Hot roof | 70 °C | 631 W | 645 W | 88.3% of rated power | ## Against the whole database | Measure | 715WT | 730WT | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,797 | #716 | 14,005 | 730WT leads by 1,081 places | | Power density | #2,018 | #800 | 14,005 | 730WT leads by 1,218 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #8,872 | #7,348 | 14,005 | 730WT leads by 1,524 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #112 | #36 | 14,005 | 730WT leads by 76 places | ## Questions ### Which panel is better: Sharp GSD8K66H-715WT or Sharp GSD8K66H-730WT? According to our database: **Sharp GSD8K66H-730WT** has higher module efficiency (**23.50%** vs **23.02%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sharp GSD8K66H-715WT and Sharp GSD8K66H-730WT? **Sharp GSD8K66H-715WT** has a module efficiency of **23.02%**, while **Sharp GSD8K66H-730WT** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Sharp GSD8K66H-715WT use vs Sharp GSD8K66H-730WT? **Sharp GSD8K66H-715WT** uses **HJT** cells; **Sharp GSD8K66H-730WT** 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 Sharp GSD8K66H-715WT and Sharp GSD8K66H-730WT? **Sharp GSD8K66H-715WT** has a **30 years** power warranty; **Sharp GSD8K66H-730WT** 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 Sharp GSD8K66H-715WT and Sharp GSD8K66H-730WT bifacial panels? Both **Sharp GSD8K66H-715WT** and **Sharp GSD8K66H-730WT** 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 - [Sharp GSD8K66H-715WT vs Sharp GSD8K66H-740WT](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-740wt) - 5 differences, the largest is module efficiency - [Sharp GSD8K66H-715WT vs Sharp GSD8K66H-735WT](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-735wt) - 3 differences, the largest is module efficiency - [Sharp GSD8K66H-715WT vs Sharp GSD8K66H-725WT](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-725wt) - 3 differences, the largest is module efficiency - [Sharp GSD8K66H-715WT vs Sharp GSD8K66H-720WT](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-720wt) - The same specification on paper - [Sharp GSD8K66H-715WT vs Sharp GSD8K66H-710WT](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-710wt) - The same specification on paper - [Sharp GSD8K66H-715WT vs Sharp NB-JD580](https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-nb-jd580) - 12 differences, the largest is temperature coefficient --- Source: https://comparepv.com/compare/sharp-gsd8k66h-715wt/sharp-gsd8k66h-730wt 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.