--- title: "First Solar FS-7530A-TR1 vs First Solar FS-7545A-TR1 - Solar Panel Comparison | ComparePV" description: "Compare First Solar FS-7530A-TR1 vs First Solar FS-7545A-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-7545a-tr1" image: "https://comparepv.com/og/compare/panels/first-solar-fs-7530a-tr1/first-solar-fs-7545a-tr1.png" updated: 2026-09-11 --- # First Solar FS-7530A-TR1 vs First Solar FS-7545A-TR1 7545A-TR1 leads on the differences that matter The largest is module efficiency: 0.50 pp more efficient. 12 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [First Solar FS-7530A-TR1](https://comparepv.com/panel/first-solar-fs-7530a-tr1) | [First Solar FS-7545A-TR1](https://comparepv.com/panel/first-solar-fs-7545a-tr1) | | Manufacturer | First Solar | First Solar | | Power | 530 Wp | 545 Wp | | Efficiency | 19.00 % | 19.50 % | | Technology | CdTe | CdTe | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 7530A-TR1 | 7545A-TR1 | Difference | | --- | --- | --- | --- | | Module efficiency | 19.00 % | 19.50 % | +0.50 pp for 7545A-TR1 | | Power density | 189.5 Wp/m² | 194.9 Wp/m² | +5.4 Wp/m² for 7545A-TR1 | | Rated power | 530 Wp | 545 Wp | +15 W for 7545A-TR1 | | Weight per kWp | 74.9 kg/kWp | 72.8 kg/kWp | -2.1 kg/kWp for 7545A-TR1 | | Open-circuit voltage | 226.70 V | 228.20 V | 1.50 V apart | | Voltage at max power | 186.90 V | 189.60 V | 2.70 V apart | ## Every compared parameter | Parameter | 7530A-TR1 | 7545A-TR1 | | --- | --- | --- | | Rated power | 530 Wp | 545 Wp | | Module efficiency | 19.00 % | 19.50 % | | Power density | 189.5 Wp/m² | 194.9 Wp/m² | | Open-circuit voltage | 226.70 V | 228.20 V | | Voltage at max power | 186.90 V | 189.60 V | | Short-circuit current | 3.05 A | 3.07 A | | Current at max power | 2.84 A | 2.88 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 | 72.8 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, 7545A-TR1:** 18,374 kWh - **Gap:** 506 kWh ## Output when hot | Condition | Cell temperature | 7530A-TR1 | 7545A-TR1 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 530 W | 545 W | 100.0% of rated power | | Cool, bright day | 40 °C | 505 W | 519 W | 95.2% of rated power | | Typical summer roof | 55 °C | 479 W | 493 W | 90.4% of rated power | | Hot roof | 70 °C | 454 W | 467 W | 85.6% of rated power | ## Against the whole database | Measure | 7530A-TR1 | 7545A-TR1 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #13,037 | #12,751 | 14,129 | 7545A-TR1 leads by 286 places | | Power density | #13,059 | #12,762 | 14,129 | 7545A-TR1 leads by 297 places | | Heat behaviour | #8,376 | #8,376 | 14,129 | Tied - the same position in the database | | Weight | #13,729 | #13,655 | 14,129 | 7545A-TR1 leads by 74 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #10,301 | #9,508 | 14,129 | 7545A-TR1 leads by 793 places | ## Questions ### Which panel is better: First Solar FS-7530A-TR1 or First Solar FS-7545A-TR1? According to our database: **First Solar FS-7545A-TR1** has higher module efficiency (**19.50%** 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-7545A-TR1? **First Solar FS-7530A-TR1** has a module efficiency of **19.00%**, while **First Solar FS-7545A-TR1** is **19.50%**. 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-7545A-TR1? **First Solar FS-7530A-TR1** uses CdTe cells; **First Solar FS-7545A-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-7545A-TR1? **First Solar FS-7530A-TR1** has a **30 years** power warranty; **First Solar FS-7545A-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-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-7535A-TR1](https://comparepv.com/compare/first-solar-fs-7530a-tr1/first-solar-fs-7535a-tr1) - The same specification on paper - [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-7545a-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.