--- title: "GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-540 - Solar Panel Comparison | ComparePV" description: "Compare GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-540 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-m10-72gdf-b-540" updated: 2026-09-11 --- # GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-540 540 leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [GCL GCL-M10/72GDF-B-535](https://comparepv.com/panel/gcl-gcl-m10-72gdf-b-535) | [GCL GCL-M10/72GDF-B-540](https://comparepv.com/panel/gcl-gcl-m10-72gdf-b-540) | | Manufacturer | GCL | GCL | | Power | 535 Wp | 540 Wp | | Efficiency | 20.40 % | 20.60 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 535 | 540 | Difference | | --- | --- | --- | --- | | Module efficiency | 20.40 % | 20.60 % | +0.20 pp for 540 | ## Every compared parameter | Parameter | 535 | 540 | | --- | --- | --- | | Rated power | 535 Wp | 540 Wp | | Module efficiency | 20.40 % | 20.60 % | | Power density | 203.9 Wp/m² | 205.8 Wp/m² | | Open-circuit voltage | 48.96 V | 49.24 V | | Voltage at max power | 41.22 V | 41.45 V | | Short-circuit current | 13.73 A | 13.78 A | | Current at max power | 12.98 A | 13.03 A | | Temperature coefficient | -0.350 %/°C | -0.350 %/°C | | Dimensions | 2290x1146x30 mm | 2290x1146x30 mm | | Module area | 2.624 m² | 2.624 m² | | Weight | 33.2 kg | 33.2 kg | | Weight per kWp | 62.1 kg/kWp | 61.5 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.45 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.350 %/°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, 535:** 17,618 kWh - **Cumulative output, 540:** 17,783 kWh - **Gap:** 165 kWh ## Output when hot | Condition | Cell temperature | 535 | 540 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 535 W | 540 W | 100.0% of rated power | | Cool, bright day | 40 °C | 507 W | 512 W | 94.8% of rated power | | Typical summer roof | 55 °C | 479 W | 483 W | 89.5% of rated power | | Hot roof | 70 °C | 451 W | 455 W | 84.2% of rated power | ## Against the whole database | Measure | 535 | 540 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11,598 | #11,093 | 14,005 | 540 leads by 505 places | | Power density | #11,636 | #11,142 | 14,005 | 540 leads by 494 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #12,734 | #12,653 | 14,005 | 540 leads by 81 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #8,686 | #8,312 | 14,005 | 540 leads by 374 places | ## Questions ### Which panel is better: GCL GCL-M10/72GDF-B-535 or GCL GCL-M10/72GDF-B-540? According to our database: **GCL GCL-M10/72GDF-B-540** has higher module efficiency (**20.60%** vs **20.40%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of GCL GCL-M10/72GDF-B-535 and GCL GCL-M10/72GDF-B-540? **GCL GCL-M10/72GDF-B-535** has a module efficiency of **20.40%**, while **GCL GCL-M10/72GDF-B-540** is **20.60%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does GCL GCL-M10/72GDF-B-535 use vs GCL GCL-M10/72GDF-B-540? **GCL GCL-M10/72GDF-B-535** uses **PERC** cells; **GCL GCL-M10/72GDF-B-540** uses **PERC**. 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 GCL GCL-M10/72GDF-B-535 and GCL GCL-M10/72GDF-B-540? **GCL GCL-M10/72GDF-B-535** has a **30 years** power warranty; **GCL GCL-M10/72GDF-B-540** 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 GCL GCL-M10/72GDF-B-535 and GCL GCL-M10/72GDF-B-540 bifacial panels? Both **GCL GCL-M10/72GDF-B-535** and **GCL GCL-M10/72GDF-B-540** 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 - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-555](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-m10-72gdf-b-555) - 5 differences, the largest is module efficiency - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-550](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-m10-72gdf-b-550) - 3 differences, the largest is module efficiency - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-M10/72GDF-B-545](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-m10-72gdf-b-545) - 3 differences, the largest is module efficiency - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-NT12/66GDF-740](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-nt12-66gdf-740) - 13 differences, the largest is module efficiency - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-NT12/66GDF-735](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-nt12-66gdf-735) - 13 differences, the largest is module efficiency - [GCL GCL-M10/72GDF-B-535 vs GCL GCL-NT12/66GDF-730](https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-nt12-66gdf-730) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/gcl-gcl-m10-72gdf-b-535/gcl-gcl-m10-72gdf-b-540 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.