--- title: "Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-585WT - Solar Panel Comparison | ComparePV" description: "Compare Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-585WT side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-585wt" updated: 2026-09-11 --- # Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-585WT 585WT leads on the differences that matter The largest is module efficiency: 0.39 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tata Power Solar GSD7S72T-575WT](https://comparepv.com/panel/tata-power-solar-gsd7s72t-575wt) | [Tata Power Solar GSD7S72T-585WT](https://comparepv.com/panel/tata-power-solar-gsd7s72t-585wt) | | Manufacturer | Tata Power Solar | Tata Power Solar | | Power | 575 Wp | 585 Wp | | Efficiency | 22.26 % | 22.65 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 575WT | 585WT | Difference | | --- | --- | --- | --- | | Module efficiency | 22.26 % | 22.65 % | +0.39 pp for 585WT | | Power density | 222.6 Wp/m² | 226.5 Wp/m² | +3.9 Wp/m² for 585WT | | Rated power | 575 Wp | 585 Wp | +10 W for 585WT | ## Every compared parameter | Parameter | 575WT | 585WT | | --- | --- | --- | | Rated power | 575 Wp | 585 Wp | | Module efficiency | 22.26 % | 22.65 % | | Power density | 222.6 Wp/m² | 226.5 Wp/m² | | Open-circuit voltage | 50.88 V | 51.16 V | | Voltage at max power | 42.22 V | 42.52 V | | Short-circuit current | 14.39 A | 14.55 A | | Current at max power | 13.62 A | 13.76 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2278x1134x30 mm | 2278x1134x30 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 32.0 kg | 32.0 kg | | Weight per kWp | 55.7 kg/kWp | 54.7 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | 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 (-0.300 %/°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, 575WT:** 19,292 kWh - **Cumulative output, 585WT:** 19,628 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | 575WT | 585WT | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 575 W | 585 W | 100.0% of rated power | | Cool, bright day | 40 °C | 549 W | 559 W | 95.5% of rated power | | Typical summer roof | 55 °C | 523 W | 532 W | 91.0% of rated power | | Hot roof | 70 °C | 497 W | 506 W | 86.5% of rated power | ## Against the whole database | Measure | 575WT | 585WT | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,593 | #3,522 | 14,005 | 585WT leads by 2,071 places | | Power density | #5,549 | #3,500 | 14,005 | 585WT leads by 2,049 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #10,019 | #9,081 | 14,005 | 585WT leads by 938 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,336 | #1,777 | 14,005 | 585WT leads by 559 places | ## Questions ### Which panel is better: Tata Power Solar GSD7S72T-575WT or Tata Power Solar GSD7S72T-585WT? According to our database: **Tata Power Solar GSD7S72T-585WT** has higher module efficiency (**22.65%** vs **22.26%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tata Power Solar GSD7S72T-575WT and Tata Power Solar GSD7S72T-585WT? **Tata Power Solar GSD7S72T-575WT** has a module efficiency of **22.26%**, while **Tata Power Solar GSD7S72T-585WT** is **22.65%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tata Power Solar GSD7S72T-575WT use vs Tata Power Solar GSD7S72T-585WT? **Tata Power Solar GSD7S72T-575WT** uses **TOPCon** cells; **Tata Power Solar GSD7S72T-585WT** uses **TOPCon**. 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 Tata Power Solar GSD7S72T-575WT and Tata Power Solar GSD7S72T-585WT? **Tata Power Solar GSD7S72T-575WT** has a **30 years** power warranty; **Tata Power Solar GSD7S72T-585WT** 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 Tata Power Solar GSD7S72T-575WT and Tata Power Solar GSD7S72T-585WT bifacial panels? Both **Tata Power Solar GSD7S72T-575WT** and **Tata Power Solar GSD7S72T-585WT** 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 - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-595WT](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-595wt) - 3 differences, the largest is module efficiency - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-590WT](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-590wt) - 3 differences, the largest is module efficiency - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-580WT](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-580wt) - The same specification on paper - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-570WT](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-570wt) - The same specification on paper - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar GSD7S72T-565WT](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-565wt) - 3 differences, the largest is module efficiency - [Tata Power Solar GSD7S72T-575WT vs Tata Power Solar TP642LG10B](https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-tp642lg10b) - 13 differences, the largest is temperature coefficient --- Source: https://comparepv.com/compare/tata-power-solar-gsd7s72t-575wt/tata-power-solar-gsd7s72t-585wt 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.