--- title: "Exiom EX555MB(144)182 vs Exiom EX590TC-144HC182BF - Solar Panel Comparison | ComparePV" description: "Compare Exiom EX555MB(144)182 vs Exiom EX590TC-144HC182BF side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex590tc-144hc182bf" updated: 2026-09-11 --- # Exiom EX555MB(144)182 vs Exiom EX590TC-144HC182BF EX590TC-144HC182BF leads on the differences that matter The largest is module efficiency: 1.30 pp more efficient. 8 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 | [Exiom EX555MB(144)182](https://comparepv.com/panel/exiom-ex555mb-144-182) | [Exiom EX590TC-144HC182BF](https://comparepv.com/panel/exiom-ex590tc-144hc182bf) | | Manufacturer | Exiom | Exiom | | Power | 555 Wp | 590 Wp | | Efficiency | 21.50 % | 22.80 % | | Technology | PERC | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | EX555MB(144)182 | EX590TC-144HC182BF | Difference | | --- | --- | --- | --- | | Module efficiency | 21.50 % | 22.80 % | +1.30 pp for EX590TC-144HC182BF | | Temperature coefficient | -0.350 %/°C | -0.280 %/°C | +0.070 %/°C for EX590TC-144HC182BF | | Power density | 214.8 Wp/m² | 228.3 Wp/m² | +13.5 Wp/m² for EX590TC-144HC182BF | | Rated power | 555 Wp | 590 Wp | +35 W for EX590TC-144HC182BF | | Weight | 27.3 kg | 31.5 kg | -4.2 kg for EX555MB(144)182 | | Weight per kWp | 49.2 kg/kWp | 53.4 kg/kWp | -4.2 kg/kWp for EX555MB(144)182 | | Cell technology | PERC | TOPCon | PERC vs TOPCon | | Open-circuit voltage | 50.02 V | 51.63 V | 1.61 V apart | | Bifacial | No | Yes | No vs Yes | | Voltage at max power | 42.11 V | 43.44 V | 1.33 V apart | ## Every compared parameter | Parameter | EX555MB(144)182 | EX590TC-144HC182BF | | --- | --- | --- | | Rated power | 555 Wp | 590 Wp | | Module efficiency | 21.50 % | 22.80 % | | Power density | 214.8 Wp/m² | 228.3 Wp/m² | | Open-circuit voltage | 50.02 V | 51.63 V | | Voltage at max power | 42.11 V | 43.44 V | | Short-circuit current | 14.07 A | 14.38 A | | Current at max power | 13.18 A | 13.59 A | | Temperature coefficient | -0.350 %/°C | -0.280 %/°C | | Dimensions | 2279x1134 mm | 2279x1134 mm | | Module area | 2.584 m² | 2.584 m² | | Weight | 27.3 kg | 31.5 kg | | Weight per kWp | 49.2 kg/kWp | 53.4 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | PERC | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | No | 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 - **Cumulative output, EX555MB(144)182:** 18,621 kWh - **Cumulative output, EX590TC-144HC182BF:** 19,796 kWh - **Gap:** 1,175 kWh ## Output when hot | Condition | Cell temperature | EX555MB(144)182 | EX590TC-144HC182BF | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 555 W | 590 W | 100.0% of rated power | | Cool, bright day | 40 °C | 526 W | 565 W | 94.8% of rated power | | Typical summer roof | 55 °C | 497 W | 540 W | 89.5% of rated power | | Hot roof | 70 °C | 468 W | 516 W | 84.2% of rated power | ## Against the whole database | Measure | EX555MB(144)182 | EX590TC-144HC182BF | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,958 | #2,714 | 14,005 | EX590TC-144HC182BF leads by 5,244 places | | Power density | #8,148 | #2,731 | 14,005 | EX590TC-144HC182BF leads by 5,417 places | | Heat behaviour | #10,419 | #1,309 | 14,005 | EX590TC-144HC182BF leads by 9,110 places | | Weight | #2,789 | #7,293 | 14,005 | EX555MB(144)182 leads by 4,504 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,761 | #1,597 | 14,005 | EX590TC-144HC182BF leads by 2,164 places | ## Questions ### Which panel is better: Exiom EX555MB(144)182 or Exiom EX590TC-144HC182BF? According to our database: **Exiom EX590TC-144HC182BF** has higher module efficiency (**22.80%** vs **21.50%**); **Exiom EX590TC-144HC182BF** tolerates heat better (temp coeff **-0.280%/°C** vs **-0.350%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Exiom EX555MB(144)182 and Exiom EX590TC-144HC182BF? **Exiom EX555MB(144)182** has a module efficiency of **21.50%**, while **Exiom EX590TC-144HC182BF** is **22.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Exiom EX555MB(144)182 use vs Exiom EX590TC-144HC182BF? **Exiom EX555MB(144)182** uses **PERC** cells; **Exiom EX590TC-144HC182BF** 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 Exiom EX555MB(144)182 and Exiom EX590TC-144HC182BF? **Exiom EX555MB(144)182** has a **30 years** power warranty; **Exiom EX590TC-144HC182BF** 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 Exiom EX555MB(144)182 and Exiom EX590TC-144HC182BF bifacial panels? **Exiom EX590TC-144HC182BF** is bifacial (captures light from both faces); **Exiom EX555MB(144)182** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Exiom EX555MB(144)182 vs Exiom EX560MB(144)182](https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex560mb-144-182) - One difference: module efficiency - [Exiom EX555MB(144)182 vs Exiom EX550MB(144)182](https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex550mb-144-182) - One difference: module efficiency - [Exiom EX555MB(144)182 vs Exiom EX545MB(144)182](https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex545mb-144-182) - 3 differences, the largest is module efficiency - [Exiom EX555MB(144)182 vs Exiom EX540MB(144)182](https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex540mb-144-182) - 3 differences, the largest is module efficiency - [Exiom EX590TC-144HC182BF vs Exiom EX605TC-144HC182BF](https://comparepv.com/compare/exiom-ex590tc-144hc182bf/exiom-ex605tc-144hc182bf) - 3 differences, the largest is module efficiency - [Exiom EX590TC-144HC182BF vs Exiom EX600TC-144HC182BF](https://comparepv.com/compare/exiom-ex590tc-144hc182bf/exiom-ex600tc-144hc182bf) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/exiom-ex555mb-144-182/exiom-ex590tc-144hc182bf 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.