--- title: "Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 450 Wp - Solar Panel Comparison | ComparePV" description: "Compare Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 450 Wp side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-450-wp" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 450 Wp 450 Wp leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 17 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 | [Solarwatt SOLARWATT Panel vision M 5.0 445Wp](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-m-5-0-445wp) | [Solarwatt SOLARWATT Panel vision M 5.0 450 Wp](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-m-5-0-450-wp) | | Manufacturer | Solarwatt | Solarwatt | | Power | 445 Wp | 450 Wp | | Efficiency | 22.30 % | 22.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 445Wp | 450 Wp | Difference | | --- | --- | --- | --- | | Module efficiency | 22.30 % | 22.50 % | +0.20 pp for 450 Wp | ## Every compared parameter | Parameter | 445Wp | 450 Wp | | --- | --- | --- | | Rated power | 445 Wp | 450 Wp | | Module efficiency | 22.30 % | 22.50 % | | Power density | 222.7 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 39.60 V | 39.80 V | | Voltage at max power | 33.00 V | 33.20 V | | Short-circuit current | 14.00 A | 14.00 A | | Current at max power | 13.50 A | 13.50 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x35 mm | 1762x1134x35 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 24.8 kg | 24.8 kg | | Weight per kWp | 55.7 kg/kWp | 55.1 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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, 445Wp:** 14,931 kWh - **Cumulative output, 450 Wp:** 15,098 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | 445Wp | 450 Wp | 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 | 445Wp | 450 Wp | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,100 | #4,222 | 14,005 | 450 Wp leads by 878 places | | Power density | #5,302 | #4,225 | 14,005 | 450 Wp leads by 1,077 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #10,127 | #9,543 | 14,005 | 450 Wp leads by 584 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #5,595 | #5,200 | 14,005 | 450 Wp leads by 395 places | ## Questions ### Which panel is better: Solarwatt SOLARWATT Panel vision M 5.0 445Wp or Solarwatt SOLARWATT Panel vision M 5.0 450 Wp? According to our database: **Solarwatt SOLARWATT Panel vision M 5.0 **450 Wp**** has higher module efficiency (**22.50%** vs **22.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solarwatt SOLARWATT Panel vision M 5.0 445Wp and Solarwatt SOLARWATT Panel vision M 5.0 450 Wp? **Solarwatt SOLARWATT Panel vision M 5.0 **445 Wp**** has a module efficiency of **22.30%**, while **Solarwatt SOLARWATT Panel vision M 5.0 **450 Wp**** is **22.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solarwatt SOLARWATT Panel vision M 5.0 445Wp use vs Solarwatt SOLARWATT Panel vision M 5.0 450 Wp? **Solarwatt SOLARWATT Panel vision M 5.0 **445 Wp**** uses **TOPCon** cells; **Solarwatt SOLARWATT Panel vision M 5.0 **450 Wp**** 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 Solarwatt SOLARWATT Panel vision M 5.0 445Wp and Solarwatt SOLARWATT Panel vision M 5.0 450 Wp? **Solarwatt SOLARWATT Panel vision M 5.0 **445 Wp**** has a **30 years** power warranty; **Solarwatt SOLARWATT Panel vision M 5.0 **450 Wp**** 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 Solarwatt SOLARWATT Panel vision M 5.0 445Wp and Solarwatt SOLARWATT Panel vision M 5.0 450 Wp bifacial panels? Both **Solarwatt SOLARWATT Panel vision M 5.0 **445 Wp**** and **Solarwatt SOLARWATT Panel vision M 5.0 **450 Wp**** 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 - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 460 Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-460-wp) - 3 differences, the largest is module efficiency - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 455 Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-455-wp) - 3 differences, the largest is module efficiency - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 450Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-450wp) - One difference: module efficiency - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt vision M 5.0 450 Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-vision-m-5-0-450-wp) - One difference: module efficiency - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt SOLARWATT Panel vision M 5.0 445 Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-445-wp) - The same specification on paper - [Solarwatt SOLARWATT Panel vision M 5.0 445Wp vs Solarwatt vision M 5.0 445 Wp](https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-vision-m-5-0-445-wp) - The same specification on paper --- Source: https://comparepv.com/compare/solarwatt-solarwatt-panel-vision-m-5-0-445wp/solarwatt-solarwatt-panel-vision-m-5-0-450-wp 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.