--- title: "G-STAR Solar Panels Review 2026: Pros, Cons & Specs | ComparePV" description: "In-depth G-STAR solar panel review 2026. 36 models analyzed: efficiency, cell technology, warranty, top picks. Compare G-STAR panels on ComparePV." source: "https://comparepv.com/reviews/g-star" --- # G-STAR panels, *read off the datasheets* G-STAR has 36 modules in the database, from 420 to 725 Wp. Everything below is computed from those 36 datasheets: no score out of ten, no ranking of brands against each other, and nothing a manufacturer can pay to change. Where G-STAR does not publish a figure, it is left out of the average rather than assumed. ## Key figures | Measure | Value | Note | | --- | --- | --- | | Panels | 36 | models in the database | | Average efficiency | 22.4 % | across the catalogue | | Best efficiency | 23.5 % (good) | their strongest module | | Power range | 420-725 Wp | smallest to largest | | Bifacial share | 86 % | 31 dual-sided models | | Average warranty | 30 years | guaranteed output term | ## 01. The top of the range The leaders of G-STAR's own catalogue on the two figures a specification sheet leads with. Neither is a verdict: the most efficient module in a range is rarely the one that suits a given roof. ### Most efficient module efficiency | # | Panel | power | efficiency | | --- | --- | --- | --- | | 1 | [GSD8R66T-635WT](https://comparepv.com/panel/g-star-gsd8r66t-635wt) | 635 Wp | 23.5% (good) | | 2 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 725 Wp | 23.3% (good) | | 3 | [GSD8R66T-630WT](https://comparepv.com/panel/g-star-gsd8r66t-630wt) | 630 Wp | 23.3% (good) | | 4 | [GSD8R48T-465BT](https://comparepv.com/panel/g-star-gsd8r48t-465bt) | 465 Wp | 23.3% (good) | | 5 | [GSD7S72T-600WT](https://comparepv.com/panel/g-star-gsd7s72t-600wt) | 600 Wp | 23.2% (good) | - GSD8R66T-635WT - Monocrystalline bifacial - GSD8K66T-725WT - Monocrystalline bifacial - GSD8R66T-630WT - Monocrystalline bifacial - GSD8R48T-465BT - Monocrystalline bifacial - GSD7S72T-600WT - Monocrystalline bifacial [Sort the whole catalogue by efficiency](https://comparepv.com/panels/g-star?sort_by=efficiency&sort_order=desc) ### Highest power nameplate output | # | Panel | efficiency | power | | --- | --- | --- | --- | | 1 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 23.3% (good) | 725 Wp | | 2 | [GSD8K66T-720WT](https://comparepv.com/panel/g-star-gsd8k66t-720wt) | 23.2% (good) | 720 Wp | | 3 | [GSD8K66T-715WT](https://comparepv.com/panel/g-star-gsd8k66t-715wt) | 23.0% (good) | 715 Wp | | 4 | [GSD8K66T-710WT](https://comparepv.com/panel/g-star-gsd8k66t-710wt) | 22.9% (good) | 710 Wp | | 5 | [GSD8K66T-705WT](https://comparepv.com/panel/g-star-gsd8k66t-705wt) | 22.7% (good) | 705 Wp | - GSD8K66T-725WT - Monocrystalline bifacial - GSD8K66T-720WT - Monocrystalline bifacial - GSD8K66T-715WT - Monocrystalline bifacial - GSD8K66T-710WT - Monocrystalline bifacial - GSD8K66T-705WT - Monocrystalline bifacial [Sort the whole catalogue by power](https://comparepv.com/panels/g-star?sort_by=power&sort_order=desc) ## 02. By what the array is for Three cuts of the same catalogue, each ordered by efficiency inside its band. An empty column means the brand does not build for that case. ### For a house roof 380-460 Wp | # | Panel | power | efficiency | | --- | --- | --- | --- | | 1 | [GSD8R48T-460BT](https://comparepv.com/panel/g-star-gsd8r48t-460bt) | 460 Wp | 23.0% (good) | | 2 | [GSD8R48T-455BT](https://comparepv.com/panel/g-star-gsd8r48t-455bt) | 455 Wp | 22.8% (good) | | 3 | [GSN7S54T-440BB](https://comparepv.com/panel/g-star-gsn7s54t-440bb) | 440 Wp | 22.5% (good) | | 4 | [GSD8R48T-450BT](https://comparepv.com/panel/g-star-gsd8r48t-450bt) | 450 Wp | 22.5% (good) | | 5 | [GSN7S54T-435BB](https://comparepv.com/panel/g-star-gsn7s54t-435bb) | 435 Wp | 22.3% (good) | - GSD8R48T-460BT - Monocrystalline bifacial - GSD8R48T-455BT - Monocrystalline bifacial - GSN7S54T-440BB - Monocrystalline - GSD8R48T-450BT - Monocrystalline bifacial - GSN7S54T-435BB - Monocrystalline ### For a commercial array 500 Wp and up | # | Panel | power | efficiency | | --- | --- | --- | --- | | 1 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 725 Wp | 23.3% (good) | | 2 | [GSD8K66T-720WT](https://comparepv.com/panel/g-star-gsd8k66t-720wt) | 720 Wp | 23.2% (good) | | 3 | [GSD8K66T-715WT](https://comparepv.com/panel/g-star-gsd8k66t-715wt) | 715 Wp | 23.0% (good) | | 4 | [GSD8K66T-710WT](https://comparepv.com/panel/g-star-gsd8k66t-710wt) | 710 Wp | 22.9% (good) | | 5 | [GSD8K66T-705WT](https://comparepv.com/panel/g-star-gsd8k66t-705wt) | 705 Wp | 22.7% (good) | - GSD8K66T-725WT - Monocrystalline bifacial - GSD8K66T-720WT - Monocrystalline bifacial - GSD8K66T-715WT - Monocrystalline bifacial - GSD8K66T-710WT - Monocrystalline bifacial - GSD8K66T-705WT - Monocrystalline bifacial ### For a ground mount dual-sided | # | Panel | power | efficiency | | --- | --- | --- | --- | | 1 | [GSD8R66T-635WT](https://comparepv.com/panel/g-star-gsd8r66t-635wt) | 635 Wp | 23.5% (good) | | 2 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 725 Wp | 23.3% (good) | | 3 | [GSD8R66T-630WT](https://comparepv.com/panel/g-star-gsd8r66t-630wt) | 630 Wp | 23.3% (good) | | 4 | [GSD8R48T-465BT](https://comparepv.com/panel/g-star-gsd8r48t-465bt) | 465 Wp | 23.3% (good) | | 5 | [GSD7S72T-600WT](https://comparepv.com/panel/g-star-gsd7s72t-600wt) | 600 Wp | 23.2% (good) | - GSD8R66T-635WT - Monocrystalline bifacial - GSD8K66T-725WT - Monocrystalline bifacial - GSD8R66T-630WT - Monocrystalline bifacial - GSD8R48T-465BT - Monocrystalline bifacial - GSD7S72T-600WT - Monocrystalline bifacial ## 03. What the catalogue is made of Shares are of the 36 modules in the database, counted once each. A power ladder of one module counts as its rungs, which is why a large catalogue is not the same as a wide one. [Cell technology across the market](https://comparepv.com/stats/cell-technology) ### Cell technology share of the catalogue | # | Panel | share | panels | | --- | --- | --- | --- | | | TOPCon | 72.2% | 26 | | | N-type | 13.9% | 5 | | | PERC | 13.9% | 5 | TOPCon accounts for 72.2% of the catalogue - 26 of 36 modules. ### Efficiency spread share of the catalogue | # | Panel | share | panels | | --- | --- | --- | --- | | | 20-21% | 8.3% | 3 | | | 21-22% | 13.9% | 5 | | | 22-23% | 50.0% | 18 | | | 23%+ | 27.8% | 10 | ## 04. Strengths and gaps Both lists are derived from the figures above rather than written about the brand. A gap here is a gap in what is published, which is not always a gap in what is built. ### What this catalogue is good at - **Strength:** High-efficiency panels available (up to 23.5%) - **Strength:** Strong bifacial lineup - 86% of portfolio supports dual-sided generation - **Strength:** Strong warranty coverage averaging 30 years - **Strength:** High-power panels available (up to 725W) for commercial applications ## 05. In short > **G-STAR:** G-STAR is an industry leader in efficiency, offering 36 panels suitable for both residential and commercial buyers. With an average efficiency of 22.4% and top models reaching 23.5%, their panels deliver competitive performance. ### Common questions #### Is G-STAR a good solar panel manufacturer? G-STAR offers 36 solar panel models with an average efficiency of 22.4%. Check their full panel lineup on ComparePV to find the best model for your needs. #### What types of solar panels does G-STAR make? G-STAR manufactures panels ranging from 420W to 725W, covering both residential and commercial applications. Their portfolio includes TOPCon (72%), N-type (14%), PERC (14%) cell technologies. #### How efficient are G-STAR solar panels? G-STAR panels have an average efficiency of 22.4%, with their most efficient model reaching 23.5%. This puts them among the industry leaders in the current market. #### Does G-STAR make bifacial solar panels? Yes, G-STAR offers 31 bifacial panels, representing 86% of their portfolio. Bifacial panels can generate additional energy from the rear side, making them ideal for ground-mounted systems. #### What warranty does G-STAR offer on their solar panels? G-STAR panels come with an average performance warranty of 30 years. This warranty guarantees that the panels will maintain a specified level of power output over time, protecting your investment against degradation beyond normal levels. #### Are G-STAR panels good for residential use? G-STAR offers panels in the residential-friendly 380-460W range. For home installations, look for models with high efficiency and compact dimensions to maximize power from limited roof space. Browse their full lineup on ComparePV to filter by power range and specifications. #### Does G-STAR use TOPCon technology? Yes, G-STAR has adopted TOPCon (Tunnel Oxide Passivated Contact) cell technology in part of their portfolio. TOPCon cells offer higher efficiency and better temperature performance compared to older PERC technology, making them a strong choice for maximizing energy production. ## 06. Compared with A brand comparison weighs the two catalogues against each other - what each builds, at what efficiency, and how deep the range goes. [Build your own](https://comparepv.com/comparisons) - [G-STAR vs Jinko Solar](https://comparepv.com/g-star-vs-jinko-solar) - [G-STAR vs JA Solar](https://comparepv.com/g-star-vs-ja-solar) - [G-STAR vs Trina Solar](https://comparepv.com/g-star-vs-trina-solar) - [G-STAR vs LONGi](https://comparepv.com/g-star-vs-longi) - [G-STAR vs Canadian Solar](https://comparepv.com/canadian-solar-vs-g-star) - [G-STAR vs Q-Cells](https://comparepv.com/g-star-vs-q-cells) - [G-STAR vs AIKO](https://comparepv.com/aiko-vs-g-star) - [G-STAR vs Hyundai](https://comparepv.com/g-star-vs-hyundai) ## Elsewhere - [All G-STAR panels 36](https://comparepv.com/panels/g-star) - [All manufacturers](https://comparepv.com/reviews) - [Panel database](https://comparepv.com/panels) - [Market statistics](https://comparepv.com/stats) --- Source: https://comparepv.com/reviews/g-star