--- title: "Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-450W-TD - Solar Panel Comparison | ComparePV" description: "Compare Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-450W-TD side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-450w-td" updated: 2026-09-11 --- # Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-450W-TD (445-465)W-TD (455W class) 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 | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | [Just Solar JST-EDMH-450W-TD](https://comparepv.com/panel/just-solar-jst-edmh-450w-td) | | Manufacturer | Just Solar | Just Solar | | Power | 455 Wp | 450 Wp | | Efficiency | 23.30 % | 23.05 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | (445-465)W-TD (455W class) | 450W-TD | Difference | | --- | --- | --- | --- | | Module efficiency | 23.30 % | 23.05 % | +0.25 pp for (445-465)W-TD (455W class) | ## Every compared parameter | Parameter | (445-465)W-TD (455W class) | 450W-TD | | --- | --- | --- | | Rated power | 455 Wp | 450 Wp | | Module efficiency | 23.30 % | 23.05 % | | Power density | 233.0 Wp/m² | 230.4 Wp/m² | | Open-circuit voltage | 38.70 V | 38.50 V | | Voltage at max power | 33.10 V | 32.90 V | | Short-circuit current | 14.26 A | 14.19 A | | Current at max power | 13.75 A | 13.68 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 1722x1134x30 mm | 1722x1134x30 mm | | Module area | 1.953 m² | 1.953 m² | | Weight | 20.5 kg | 20.5 kg | | Weight per kWp | 45.1 kg/kWp | 45.6 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.50 %/yr | 0.50 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | Bifacial | No | No | ## 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 (-0.300 %/°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, (445-465)W-TD (455W class):** 15,029 kWh - **Cumulative output, 450W-TD:** 14,864 kWh - **Gap:** 165 kWh ## Output when hot | Condition | Cell temperature | (445-465)W-TD (455W class) | 450W-TD | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 455 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 435 W | 430 W | 95.5% of rated power | | Typical summer roof | 55 °C | 414 W | 410 W | 91.0% of rated power | | Hot roof | 70 °C | 394 W | 389 W | 86.5% of rated power | ## Against the whole database | Measure | (445-465)W-TD (455W class) | 450W-TD | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #1,700 | 14,005 | (445-465)W-TD (455W class) leads by 683 places | | Power density | #1,098 | #1,708 | 14,005 | (445-465)W-TD (455W class) leads by 610 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #607 | #767 | 14,005 | (445-465)W-TD (455W class) leads by 160 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #7,080 | #7,596 | 14,005 | (445-465)W-TD (455W class) leads by 516 places | ## Questions ### Which panel is better: Just Solar JST-EDMH-(445-465)W-TD (455W class) or Just Solar JST-EDMH-450W-TD? According to our database: **Just Solar JST-EDMH-(445-465)W-TD (**455 W** class)** has higher module efficiency (**23.30%** vs **23.05%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Just Solar JST-EDMH-(445-465)W-TD (455W class) and Just Solar JST-EDMH-450W-TD? **Just Solar JST-EDMH-(445-465)W-TD (**455 W** class)** has a module efficiency of **23.30%**, while **Just Solar JST-EDMH-**450 W**-TD** is **23.05%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Just Solar JST-EDMH-(445-465)W-TD (455W class) use vs Just Solar JST-EDMH-450W-TD? **Just Solar JST-EDMH-(445-465)W-TD (**455 W** class)** uses **TOPCon** cells; **Just Solar JST-EDMH-**450 W**-TD** 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 Just Solar JST-EDMH-(445-465)W-TD (455W class) and Just Solar JST-EDMH-450W-TD? **Just Solar JST-EDMH-(445-465)W-TD (**455 W** class)** has a **30 years** power warranty; **Just Solar JST-EDMH-**450 W**-TD** 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 - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-445-465-w-td-465w-class) - 3 differences, the largest is module efficiency - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-465W-TD](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-465w-td) - 3 differences, the largest is module efficiency - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-(445-465)W-TD (460W class)](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-445-465-w-td-460w-class) - One difference: module efficiency - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-460W-TD](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-460w-td) - One difference: module efficiency - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-455W-TD](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-455w-td) - The same specification on paper - [Just Solar JST-EDMH-(445-465)W-TD (455W class) vs Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-445-465-w-td-450w-class) - One difference: module efficiency --- Source: https://comparepv.com/compare/just-solar-jst-edmh-445-465-w-td-455w-class/just-solar-jst-edmh-450w-td 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.