--- title: "GCL GCL-NT12R/48BGDF-445 vs GCL GCL-NT12R/48BGDF-450 - Solar Panel Comparison | ComparePV" description: "Compare GCL GCL-NT12R/48BGDF-445 vs GCL GCL-NT12R/48BGDF-450 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-445/gcl-gcl-nt12r-48bgdf-450" updated: 2026-09-11 --- # GCL GCL-NT12R/48BGDF-445 vs GCL GCL-NT12R/48BGDF-450 450 leads on the differences that matter The largest is module efficiency: 0.25 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [GCL GCL-NT12R/48BGDF-445](https://comparepv.com/panel/gcl-gcl-nt12r-48bgdf-445) | [GCL GCL-NT12R/48BGDF-450](https://comparepv.com/panel/gcl-gcl-nt12r-48bgdf-450) | | Manufacturer | GCL | GCL | | Power | 445 Wp | 450 Wp | | Efficiency | 22.27 % | 22.52 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 445 | 450 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.27 % | 22.52 % | +0.25 pp for 450 | ## Every compared parameter | Parameter | 445 | 450 | | --- | --- | --- | | Rated power | 445 Wp | 450 Wp | | Module efficiency | 22.27 % | 22.52 % | | Power density | 222.7 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 35.68 V | 35.98 V | | Voltage at max power | 30.15 V | 30.45 V | | Short-circuit current | 15.50 A | 15.52 A | | Current at max power | 14.76 A | 14.78 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 21.5 kg | 21.5 kg | | Weight per kWp | 48.3 kg/kWp | 47.8 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 | 96 | | 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, 445:** 14,931 kWh - **Cumulative output, 450:** 15,098 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | 445 | 450 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 445 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 426 W | 430 W | 95.7% of rated power | | Typical summer roof | 55 °C | 406 W | 411 W | 91.3% of rated power | | Hot roof | 70 °C | 387 W | 391 W | 87.0% of rated power | ## Against the whole database | Measure | 445 | 450 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,481 | #4,108 | 14,005 | 450 leads by 1,373 places | | Power density | #5,302 | #4,225 | 14,005 | 450 leads by 1,077 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #2,192 | #1,891 | 14,005 | 450 leads by 301 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,381 | #8,989 | 14,005 | 450 leads by 392 places | ## Questions ### Which panel is better: GCL GCL-NT12R/48BGDF-445 or GCL GCL-NT12R/48BGDF-450? According to our database: **GCL GCL-NT12R/48BGDF-450** has higher module efficiency (**22.52%** vs **22.27%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of GCL GCL-NT12R/48BGDF-445 and GCL GCL-NT12R/48BGDF-450? **GCL GCL-NT12R/48BGDF-445** has a module efficiency of **22.27%**, while **GCL GCL-NT12R/48BGDF-450** is **22.52%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does GCL GCL-NT12R/48BGDF-445 use vs GCL GCL-NT12R/48BGDF-450? **GCL GCL-NT12R/48BGDF-445** uses **TOPCon** cells; **GCL GCL-NT12R/48BGDF-450** 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-445 and GCL GCL-NT12R/48BGDF-450? **GCL GCL-NT12R/48BGDF-445** has a **30 years** power warranty; **GCL GCL-NT12R/48BGDF-450** 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-445 and GCL GCL-NT12R/48BGDF-450 bifacial panels? Both **GCL GCL-NT12R/48BGDF-445** and **GCL GCL-NT12R/48BGDF-450** 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-445 vs GCL NT12R/54BGDF-520W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-520w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-445 vs GCL NT12R/54BGDF-515W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-515w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-445 vs GCL NT12R/54BGDF-510W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-510w) - 10 differences, the largest is module efficiency - [GCL GCL-NT12R/48BGDF-445 vs GCL NT12R/54BGDF-505W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-505w) - 10 differences, the largest is rated power - [GCL GCL-NT12R/48BGDF-445 vs GCL NT12R/54BGDF-500W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-500w) - 9 differences, the largest is rated power - [GCL GCL-NT12R/48BGDF-445 vs GCL NT12R/54BGDF-495W](https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-nt12r-54bgdf-495w) - 8 differences, the largest is rated power --- Source: https://comparepv.com/compare/gcl-gcl-nt12r-48bgdf-445/gcl-gcl-nt12r-48bgdf-450 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.