--- title: "First Solar FS-7530A-TR1 vs First Solar FS-7535A-TR1 - Solar Panel Comparison | ComparePV" description: "Compare First Solar FS-7530A-TR1 vs First Solar FS-7535A-TR1 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7535a-tr1" image: "https://comparepv.com/og/compare/panels/first-solar-fs-7530a-tr1/first-solar-fs-7535a-tr1.png" updated: 2026-09-11 --- # First Solar FS-7530A-TR1 vs First Solar FS-7535A-TR1 Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [First Solar FS-7530A-TR1](https://comparepv.com/panel/first-solar-fs-7530a-tr1) | [First Solar FS-7535A-TR1](https://comparepv.com/panel/first-solar-fs-7535a-tr1) | | Manufacturer | First Solar | First Solar | | Power | 530 Wp | 535 Wp | | Efficiency | 19.00 % | 19.10 % | | Technology | CdTe | CdTe | ## Every compared parameter | Parameter | 7530A-TR1 | 7535A-TR1 | | --- | --- | --- | | Rated power | 530 Wp | 535 Wp | | Module efficiency | 19.00 % | 19.10 % | | Power density | 189.5 Wp/m² | 191.3 Wp/m² | | Open-circuit voltage | 226.70 V | 227.20 V | | Voltage at max power | 186.90 V | 187.80 V | | Short-circuit current | 3.05 A | 3.06 A | | Current at max power | 2.84 A | 2.85 A | | Temperature coefficient | -0.320 %/°C | -0.320 %/°C | | Dimensions | 2300x1216x49 mm | 2300x1216x49 mm | | Module area | 2.797 m² | 2.797 m² | | Weight | 39.7 kg | 39.7 kg | | Weight per kWp | 74.9 kg/kWp | 74.2 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.30 %/yr | 0.30 %/yr | | Cell technology | CdTe | CdTe | | Cell type | Thin film | Thin film | | Cell count | - | - | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.320 %/°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, 7530A-TR1:** 17,868 kWh - **Cumulative output, 7535A-TR1:** 18,037 kWh - **Gap:** 169 kWh ## Output when hot | Condition | Cell temperature | 7530A-TR1 | 7535A-TR1 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 530 W | 535 W | 100.0% of rated power | | Cool, bright day | 40 °C | 505 W | 509 W | 95.2% of rated power | | Typical summer roof | 55 °C | 479 W | 484 W | 90.4% of rated power | | Hot roof | 70 °C | 454 W | 458 W | 85.6% of rated power | ## Against the whole database | Measure | 7530A-TR1 | 7535A-TR1 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #13,037 | #12,993 | 14,129 | 7535A-TR1 leads by 44 places | | Power density | #13,059 | #12,973 | 14,129 | 7535A-TR1 leads by 86 places | | Heat behaviour | #8,376 | #8,376 | 14,129 | Tied - the same position in the database | | Weight | #13,729 | #13,707 | 14,129 | 7535A-TR1 leads by 22 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #10,301 | #10,106 | 14,129 | 7535A-TR1 leads by 195 places | ## Questions ### Which panel is better: First Solar FS-7530A-TR1 or First Solar FS-7535A-TR1? According to our database: **First Solar FS-7535A-TR1** has higher module efficiency (**19.10%** vs **19.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of First Solar FS-7530A-TR1 and First Solar FS-7535A-TR1? **First Solar FS-7530A-TR1** has a module efficiency of **19.00%**, while **First Solar FS-7535A-TR1** is **19.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does First Solar FS-7530A-TR1 use vs First Solar FS-7535A-TR1? **First Solar FS-7530A-TR1** uses CdTe cells; **First Solar FS-7535A-TR1** uses CdTe. 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 First Solar FS-7530A-TR1 and First Solar FS-7535A-TR1? **First Solar FS-7530A-TR1** has a **30 years** power warranty; **First Solar FS-7535A-TR1** 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. ## Related comparisons - [First Solar FS-7530A-TR1 vs First Solar FS-7550A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7550a-tr1) - 6 differences, the largest is module efficiency - [First Solar FS-7530A-TR1 vs First Solar FS-7545A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7545a-tr1) - 6 differences, the largest is module efficiency - [First Solar FS-7530A-TR1 vs First Solar FS-7540A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7540a-tr1) - 5 differences, the largest is module efficiency - [First Solar FS-7530A-TR1 vs First Solar FS-7525A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7525a-tr1) - One difference: module efficiency - [First Solar FS-7530A-TR1 vs First Solar FS-7520A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7520a-tr1) - 5 differences, the largest is module efficiency - [First Solar FS-7530A-TR1 vs First Solar FS-7515A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7515a-tr1) - 6 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7535a-tr1 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.