--- title: "G-STAR GSD7S72T-570WT 570W Solar Panel - Specs & Review | ComparePV" description: "G-STAR GSD7S72T-570WT 570W solar panel. Specs: 22.07% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/g-star-gsd7s72t-570wt" updated: 2026-09-11 --- # G-STAR GSD7S72T-570WT Middle of its segment, heavy for its output 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** G-STAR - **Model:** GSD7S72T-570WT - **Series:** GSD7S72T - **Rated power:** 570 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 570 W | 580 W | Typical | | | Module efficiency | 22.07% | 22.44% | Typical | 6,136 | | Power density | 220.7 | 224.4 | Typical | 6,058 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 32.0 kg | 31.2 kg | Weak - bottom 18% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.07% | 22.44% | Typical | 6,136 | | Power density | 220.7 | 224.4 | Typical | 6,058 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 56.1 | 53.8 | Weak - bottom 18% | 10,413 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **56.1 kg per kWp** - Bottom 18% of the TOPCon 550-600 W segment, against a median of 53.8. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 570 W - **Efficiency:** 22.07 % - **Voltage at Pmax (Vmp):** 42.07 V - **Current at Pmax (Imp):** 13.55 A - **Open-circuit voltage (Voc):** 50.74 V - **Short-circuit current (Isc):** 14.31 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 220.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 498 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6136 of 14005 | | Power density | 6058 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 10413 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Premium-class efficiency – up to 23.03%** - The top-tier variant GSD7S72T-595 achieves 23.03% module efficiency, matching direct competitors Solarspace Lumina II and Ulica Solar TOPCon (both 23.03%) and significantly outpacing the Sunova TS-BW78 (21.3%). This translates to approximately 8% more energy yield from the same footprint compared to the aforementioned Sunova module. - **30-year linear power warranty, degradation ≤0.40%/year** - The manufacturer guarantees a linear power warranty for 30 years with an annual degradation rate of ≤0.40%, retaining approximately 88% of nominal power output at year 30. Most Tier-1 modules (e.g., Jinko, Trina) offer 25-year warranties with end-of-life power retention of ~84.8%, making the GSD7S72T more attractive in long-term financial models and LCOE calculations. - **N-type TOPCon – zero LID effect** - N-type TOPCon technology completely eliminates Light-Induced Degradation (LID) inherent to P-type PERC cells. The temperature coefficient of –0.30%/°C means that at a module operating temperature of 65°C (typical summer conditions in Poland), power losses are approximately 7.5% versus ~9% for standard PERC cells (–0.35%/°C) — a tangible gain on hot days. - **Bifacial dual-glass construction, rear-side gain 5–25%** - The bifacial dual glass configuration harvests 5–25% additional energy from reflected irradiance (albedo), particularly effective over light-colored or snow-covered surfaces. The glass-glass laminate also extends mechanical service life and provides high resistance to wind and snow loads — typical rated values exceed 5,400 Pa (dynamic) and 2,400 Pa (static). - **Wide power range: 565–595 Wp across 7 variants** - Seven power variants within a single series simplify project optimization for a given module count and inverter specifications, eliminating wasted power headroom. The 30 Wp flexibility range is significant in EPC tenders and utility-scale array design, where precise string power directly influences the selection of string inverters. ## Cons - **Manufacturer not on BNEF Tier-1 list** - G-STAR does not appear on the BloombergNEF bankable Tier-1 list (confirmed by context: tier\_1\_bankable: false and absence from BNEF Q1 2026 reports). In projects financed on a non-recourse basis by banks or infrastructure funds, sourcing modules from a Tier-1 manufacturer is standard practice — the lack of this status may block financing or increase required insurance coverage for projects exceeding 1 MWp. ## About this series The G-STAR GSD7S72T solar panel series represents a breakthrough in performance thanks to the use of **N-type TOPCon cell technology**, which minimizes energy losses and ensures excellent efficiency even in challenging lighting conditions. The use of a modern **bifacial double glass** design allows for the active capture of radiation reflected from the ground, which significantly increases the total energy yield from the installation compared to traditional single-sided modules. This solution perfectly addresses the needs of commercial investors and solar farm owners looking to maximize return on investment while limiting power degradation over a long-term horizon. Thanks to the complete elimination of the LID effect and improved resistance to high operating temperatures, these modules operate much more stably than standard competitor solutions, offering a **longer warranty period for linear performance**. Solid construction and a reinforced glass-glass structure make the GSD7S72T series exceptionally resistant to extreme mechanical loads and adverse weather conditions. Choosing this specific series is an investment in **energy security and durability**, dedicated to demanding large-scale projects where the priority is every watt of power generated per square meter of surface while maintaining the lowest possible LCOE. ## Notable figures - Efficiency of 22.1% matches the \*\*TOPCon 550-600W\*\* median - Power density of 220.7 W/m² is 3.8 W/m² below \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - needs more roof space - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - In the top 44% for efficiency among all TOPCon panels ## Questions ### What warranty is provided for the G-STAR GSD7S72T panels? The G-STAR GSD7S72T series comes with a 25-year product warranty and a 30-year linear power output warranty. Thanks to N-type TOPCon cell technology, power degradation over time is significantly lower than in conventional P-type modules, resulting in genuinely higher energy yield throughout the entire operational lifetime of the installation. ### What is TOPCon technology and why is it worth choosing? TOPCon is an N-type cell technology in which an additional tunnel oxide passivation layer reduces charge carrier recombination. In practice, this translates to higher conversion efficiency, complete elimination of the LID (Light-Induced Degradation) effect, and better performance at elevated temperatures. In the GSD7S72T series, this results in more stable power output throughout the entire warranty period compared to older PERC modules. ### Are the G-STAR GSD7S72T panels suitable for a residential rooftop, or are they primarily intended for utility-scale farms? The GSD7S72T series, with a peak power of 595 Wp, consists of large-format modules designed primarily for commercial installations and utility-scale photovoltaic farms. For a typical pitched roof on a single-family home, smaller modules in the 400–430 Wp class would be a better fit. However, if you have a large roof section or a flat roof and your priority is maximizing yield per square meter, installing the GSD7S72T is technically feasible. ### How does the bifacial double glass design work in the GSD7S72T panels, and when does it provide a real advantage? The bifacial double glass construction means the module harvests energy from both the front side and from irradiance reflected onto the rear surface. The greatest gain is achieved with high-albedo ground surfaces (concrete, gravel, snow) or in vertical mounting configurations. In ground-mounted installations with adequate ground clearance, GSD7S72T panels can generate up to several percentage points more energy than an equivalent monofacial module, directly reducing the LCOE of the entire farm. ### Do the G-STAR GSD7S72T modules perform well under overcast conditions and in low winter temperatures? N-type TOPCon technology delivers a better temperature coefficient than P-type cells, meaning lower power losses during high-temperature periods. In winter, GSD7S72T panels operate efficiently even at low temperatures, and the tempered glass used in the glass-glass construction reduces the risk of microcracks under extreme frost conditions. Under diffuse irradiance, TOPCon panels outperform older mono PERC technologies, although the difference is less pronounced than under direct irradiance. ### Is G-STAR a reputable photovoltaic manufacturer, and can I rely on warranty service? G-STAR is not classified among Tier 1 manufacturers according to industry rankings (e.g., BloombergNEF), which implies lower brand recognition and a shorter bankability track record than market leaders. Before purchasing, it is advisable to verify that the distributor provides local warranty claims handling and that the manufacturer's insurance policy covers warranty claims in the event of financial difficulties on the part of the company. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gsd7s72t-595wt-bifacial-dual-glass-16bb-half-cut-mono-topcon-5e745c01a967.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.7 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +2.5 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 16 kg lighter, +2.3 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, lighter, +2.3 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | Cooler, lighter, +2.3 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Cooler, lighter, +2.2 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Cooler, lighter, +2.1 pp | | [G-STAR GSP7G72M(H)530WT](https://comparepv.com/panel/g-star-gsp7g72m-h-530wt) | 530 W | -40 W, hotter, -1.6 pp | | [G-STAR GSP7G72M(H)535WT](https://comparepv.com/panel/g-star-gsp7g72m-h-535wt) | 535 W | Hotter, lighter, -1.4 pp | | [G-STAR GSP7G72M(H)540WT](https://comparepv.com/panel/g-star-gsp7g72m-h-540wt) | 540 W | Hotter, lighter, -1.2 pp | | [G-STAR GSP7G72M(H)545WT](https://comparepv.com/panel/g-star-gsp7g72m-h-545wt) | 545 W | Hotter, lighter, -1.0 pp | | [G-STAR GSP7G72M(H)550WT](https://comparepv.com/panel/g-star-gsp7g72m-h-550wt) | 550 W | Hotter, lighter, -0.8 pp | | [G-STAR GSD7S72T-565WT](https://comparepv.com/panel/g-star-gsd7s72t-565wt) | 565 W | Very close match | | [G-STAR GSD7S72T-575WT](https://comparepv.com/panel/g-star-gsd7s72t-575wt) | 575 W | Very close match | | [G-STAR GSD7S72T-580WT](https://comparepv.com/panel/g-star-gsd7s72t-580wt) | 580 W | +10 W, +0.4 pp | | [G-STAR GSD7S72T-585WT](https://comparepv.com/panel/g-star-gsd7s72t-585wt) | 585 W | +15 W, +0.6 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +80 W, lighter, +3.1 pp | --- Source: https://comparepv.com/panel/g-star-gsd7s72t-570wt 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.