--- title: "Sharp GSD8K66H-715WT 715W Solar Panel - Specs & Review | ComparePV" description: "Sharp GSD8K66H-715WT 715W solar panel. Specs: 23.02% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sharp-gsd8k66h-715wt" updated: 2026-09-11 --- # Sharp GSD8K66H-715WT Middle of its segment, weak in heat 222 panels in the segment HJT 700-750 W ## Identity - **Manufacturer:** Sharp - **Model:** GSD8K66H-715WT - **Series:** GSD8K66H \[710–740W\] - **Rated power:** 715 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 700-750 W (222 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 715 W | 715 W | Typical | | | Module efficiency | 23.02% | 23.02% | Typical | 1,797 | | Power density | 230.2 | 230.2 | Typical | 2,018 | | Temperature coefficient | -0.260 | -0.240 | Weak - bottom 18% | 511 | | Weight (kg) | 39.0 kg | 38.3 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.02% | 23.02% | Typical | 1,797 | | Power density | 230.2 | 230.2 | Typical | 2,018 | | Temperature coefficient | -0.260 | -0.240 | Weak - bottom 18% | 511 | | Weight per kWp | 54.5 | 53.6 | Typical | 8,872 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.260 %/°C temperature coefficient** - Bottom 18% of the HJT 700-750 W segment, against a median of -0.240. - **Best for:** Commercial, utility-scale, hot-climate and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 715 W - **Efficiency:** 23.02 % - **Voltage at Pmax (Vmp):** 42.80 V - **Current at Pmax (Imp):** 16.71 A - **Open-circuit voltage (Voc):** 50.70 V - **Short-circuit current (Isc):** 17.56 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 39.0 kg - **Area:** 3.11 m2 - **Power density:** 230.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 635 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1797 of 14005 | | Power density | 2018 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 8872 of 14005 | | Warranty | 21 of 14005 | ## About this series The Sharp GSD8K66H series \[710-740W\] are modules designed to maximize energy output from every square meter - particularly in situations where high power output from a single panel and rapid string construction are crucial. The use of **bifacial construction in a glass-glass configuration** allows for energy recovery from both sides, significantly improving production in installations on reflective surfaces, flat roofs, and ground-mounted systems. The **HJT technology with half-cut cells** helps minimize losses and maintain stable performance under varying conditions, while also enhancing long-term material fatigue resistance. Another key feature is **low sensitivity to high temperatures**, allowing the module to lose less power on hot days compared to many popular solutions. This is further enhanced by **high environmental resistance** and a robust design for commercial projects. This makes it a good choice for PV farms, large industrial rooftops, and installations where high output and predictable performance are the priority. ## Notable figures - At 23.0% efficiency, this panel is on par with typical \*\*HJT 700-750W\*\* modules - Power density of 230.2 W/m² matches the \*\*HJT 700-750W\*\* median - At -0.26%/°C, loses 0.02pp more power per degree than \*\*HJT 700-750W\*\* median (-0.24%/°C) - Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface - #1797 for efficiency, #511 for temperature performance out of 14005 panels ## Questions ### What warranty does the Sharp GSD8K66H come with and what does it cover? Sharp backs the GSD8K66H series with a 25-year product warranty covering manufacturing defects and materials, plus a 30-year power output warranty. A 25-year product warranty exceeds the current market standard and reflects the manufacturer's confidence in the durability of the glass-glass HJT construction. The power warranty ensures predictable energy yield throughout the full service life of the installation. ### Is the Sharp GSD8K66H 740W panel suitable for utility-scale solar farms and large commercial rooftops? Yes, the GSD8K66H series is designed primarily for commercial and ground-mounted installations. Up to 740 W per module enables longer strings with fewer panels and lower BoS costs. The bifacial glass-glass design further improves yield on flat rooftops and ground-mounted arrays where reflected light from a bright surface reaches the rear side of the module. ### What is HJT technology in the Sharp GSD8K66H panels and is it worth the premium? HJT (Heterojunction Technology) combines a crystalline silicon wafer with thin amorphous silicon layers on both sides. In practice this delivers higher conversion efficiency and a very low temperature coefficient, meaning smaller power losses on hot days compared to standard PERC or TOPCon modules. HJT modules also tend to show lower long-term degradation rates, improving LCOE over the system lifetime. ### Do Sharp GSD8K66H panels lose significant power during hot summer days? The GSD8K66H series features low temperature sensitivity, a hallmark of HJT technology. A typical HJT temperature coefficient is around -0.24 to -0.26%/°C (Pmax), compared to approximately -0.35%/°C for standard PERC modules. In real-world terms this means meaningfully higher output on hot sunny days versus older-technology modules. ### What does bifacial mean in the Sharp GSD8K66H and when does it make the most sense? A bifacial module has active cells on both sides and can harvest albedo light reflected from the ground or rooftop surface. The greatest gains come from ground-mounted arrays, flat rooftops with light-colored membranes or gravel, and elevated racking over bright surfaces. Depending on the albedo coefficient of the surface, rear-side generation can add anywhere from a few percent up to over 20% of additional energy output. ### Is Sharp a reliable solar panel manufacturer and is the GSD8K66H still available? Sharp is a Japanese electronics and photovoltaics company with over 60 years of industry history and is classified as a Tier 1 manufacturer by independent rating agencies. The GSD8K66H series is currently in active production and has not been discontinued. Tier 1 status means the manufacturer meets strict financial and quality criteria, which supports the long-term viability of the warranty. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gsd8j66h-740wt-bifacial-dual-glass-half-cut-hjt-cc71152762e9.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -35 W, lighter, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -40 W, lighter, +2.0 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | -15 W, lighter, +2.0 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -20 W, lighter, +1.9 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -45 W, lighter, +1.8 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -45 W, lighter, +1.8 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -45 W, lighter, +1.8 pp | | [Sharp GSD8K66H-710WT](https://comparepv.com/panel/sharp-gsd8k66h-710wt) | 710 W | Very close match | | [Sharp GSD8K66H-720WT](https://comparepv.com/panel/sharp-gsd8k66h-720wt) | 720 W | Very close match | | [Sharp GSD8K66H-725WT](https://comparepv.com/panel/sharp-gsd8k66h-725wt) | 725 W | +10 W, +0.3 pp | | [Sharp GSD8K66H-730WT](https://comparepv.com/panel/sharp-gsd8k66h-730wt) | 730 W | +15 W, +0.5 pp | | [Sharp GSD8K66H-735WT](https://comparepv.com/panel/sharp-gsd8k66h-735wt) | 735 W | +20 W, +0.6 pp | | [Sharp GSD8K66H-740WT](https://comparepv.com/panel/sharp-gsd8k66h-740wt) | 740 W | +25 W, +0.8 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +90 W, +2.1 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +85 W, +1.9 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +80 W, +1.8 pp | --- Source: https://comparepv.com/panel/sharp-gsd8k66h-715wt Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.