--- title: "GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-510W - Solar Panel Comparison | ComparePV" description: "Compare GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-510W 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-nt12r-48bgdf-435/gcl-nt12r-54bgdf-510w" updated: 2026-09-11 --- # GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-510W NT12R/54BGDF-510W leads on the differences that matter The largest is module efficiency: 1.15 pp more efficient. 9 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [GCL GCL-NT12R/48BGDF-435](https://comparepv.com/panel/gcl-gcl-nt12r-48bgdf-435) | [GCL NT12R/54BGDF-510W](https://comparepv.com/panel/gcl-nt12r-54bgdf-510w) | | Manufacturer | GCL | GCL | | Power | 435 Wp | 510 Wp | | Efficiency | 21.77 % | 22.92 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | GCL-NT12R/48BGDF-435 | NT12R/54BGDF-510W | Difference | | --- | --- | --- | --- | | Module efficiency | 21.77 % | 22.92 % | +1.15 pp for NT12R/54BGDF-510W | | Rated power | 435 Wp | 510 Wp | +75 W for NT12R/54BGDF-510W | | Power density | 217.7 Wp/m² | 229.2 Wp/m² | +11.5 Wp/m² for NT12R/54BGDF-510W | | Weight | 21.5 kg | 27.3 kg | -5.8 kg for GCL-NT12R/48BGDF-435 | | Open-circuit voltage | 35.08 V | 40.90 V | 5.82 V apart | | Module area | 1.998 m² | 2.225 m² | 0.227 m² apart | | Weight per kWp | 49.4 kg/kWp | 53.5 kg/kWp | -4.1 kg/kWp for GCL-NT12R/48BGDF-435 | | Voltage at max power | 29.55 V | 34.49 V | 4.94 V apart | | Cell count | 96 | 108 | 12 cells apart | | Dimensions | 1762x1134x30 mm | 1962x1134x30 mm | 1762x1134x30 mm vs 1962x1134x30 mm | ## Every compared parameter | Parameter | GCL-NT12R/48BGDF-435 | NT12R/54BGDF-510W | | --- | --- | --- | | Rated power | 435 Wp | 510 Wp | | Module efficiency | 21.77 % | 22.92 % | | Power density | 217.7 Wp/m² | 229.2 Wp/m² | | Open-circuit voltage | 35.08 V | 40.90 V | | Voltage at max power | 29.55 V | 34.49 V | | Short-circuit current | 15.46 A | 15.47 A | | Current at max power | 14.72 A | 14.79 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1962x1134x30 mm | | Module area | 1.998 m² | 2.225 m² | | Weight | 21.5 kg | 27.3 kg | | Weight per kWp | 49.4 kg/kWp | 53.5 kg/kWp | | Product warranty | 12 yrs | 12 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 | 96 | 108 | | 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 (-0.290 %/°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, GCL-NT12R/48BGDF-435:** 14,595 kWh - **Cumulative output, NT12R/54BGDF-510W:** 17,112 kWh - **Gap:** 2,517 kWh ## Output when hot | Condition | Cell temperature | GCL-NT12R/48BGDF-435 | NT12R/54BGDF-510W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 435 W | 510 W | 100.0% of rated power | | Cool, bright day | 40 °C | 416 W | 488 W | 95.7% of rated power | | Typical summer roof | 55 °C | 397 W | 466 W | 91.3% of rated power | | Hot roof | 70 °C | 378 W | 443 W | 87.0% of rated power | ## Against the whole database | Measure | GCL-NT12R/48BGDF-435 | NT12R/54BGDF-510W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,233 | #2,350 | 14,005 | NT12R/54BGDF-510W leads by 4,883 places | | Power density | #7,066 | #2,369 | 14,005 | NT12R/54BGDF-510W leads by 4,697 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #2,936 | #7,509 | 14,005 | GCL-NT12R/48BGDF-435 leads by 4,573 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #10,072 | #6,391 | 14,005 | NT12R/54BGDF-510W leads by 3,681 places | ## Questions ### Which panel is better: GCL GCL-NT12R/48BGDF-435 or GCL NT12R/54BGDF-510W? According to our database: **GCL NT12R/54BGDF-**510 W**** has higher module efficiency (**22.92%** vs **21.77%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of GCL GCL-NT12R/48BGDF-435 and GCL NT12R/54BGDF-510W? **GCL GCL-NT12R/48BGDF-435** has a module efficiency of **21.77%**, while **GCL NT12R/54BGDF-**510 W**** is **22.92%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does GCL GCL-NT12R/48BGDF-435 use vs GCL NT12R/54BGDF-510W? **GCL GCL-NT12R/48BGDF-435** uses **TOPCon** cells; **GCL NT12R/54BGDF-**510 W**** 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 GCL GCL-NT12R/48BGDF-435 and GCL NT12R/54BGDF-510W? **GCL GCL-NT12R/48BGDF-435** has a **30 years** power warranty; **GCL NT12R/54BGDF-**510 W**** 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-NT12R/48BGDF-435 and GCL NT12R/54BGDF-510W bifacial panels? Both **GCL GCL-NT12R/48BGDF-435** and **GCL NT12R/54BGDF-**510 W**** 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-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-520W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-520w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-515W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-515w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-505W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-505w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-500W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-500w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-495W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-495w) - 10 differences, the largest is rated power - [GCL GCL-NT12R/48BGDF-435 vs GCL GCL-NT12R/48GDF](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-gcl-nt12r-48gdf) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-435/gcl-nt12r-54bgdf-510w 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.