--- title: "Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-590 - Solar Panel Comparison | ComparePV" description: "Compare Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-590 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-590" updated: 2026-09-11 --- # Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-590 Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Renewsys DESERV Extreme 144X-585](https://comparepv.com/panel/renewsys-deserv-extreme-144x-585) | [Renewsys DESERV Extreme 144X-590](https://comparepv.com/panel/renewsys-deserv-extreme-144x-590) | | Manufacturer | Renewsys | Renewsys | | Power | 585 Wp | 590 Wp | | Efficiency | 22.68 % | 22.87 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | 585 | 590 | | --- | --- | --- | | Rated power | 585 Wp | 590 Wp | | Module efficiency | 22.68 % | 22.87 % | | Power density | 226.8 Wp/m² | 228.7 Wp/m² | | Open-circuit voltage | 52.22 V | 52.51 V | | Voltage at max power | 43.67 V | 43.93 V | | Short-circuit current | 14.30 A | 14.34 A | | Current at max power | 13.41 A | 13.45 A | | Temperature coefficient | -0.292 %/°C | -0.292 %/°C | | Dimensions | 2277x1133x35 mm | 2277x1133x35 mm | | Module area | 2.580 m² | 2.580 m² | | Weight | 31.5 kg | 31.5 kg | | Weight per kWp | 53.8 kg/kWp | 53.4 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | 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 (-0.292 %/°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, 585:** 19,628 kWh - **Cumulative output, 590:** 19,796 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 585 | 590 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 585 W | 590 W | 100.0% of rated power | | Cool, bright day | 40 °C | 559 W | 564 W | 95.6% of rated power | | Typical summer roof | 55 °C | 534 W | 538 W | 91.2% of rated power | | Hot roof | 70 °C | 508 W | 512 W | 86.9% of rated power | ## Against the whole database | Measure | 585 | 590 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,505 | #2,531 | 14,005 | 590 leads by 974 places | | Power density | #3,471 | #2,450 | 14,005 | 590 leads by 1,021 places | | Heat behaviour | #6,056 | #6,056 | 14,005 | Tied - the same position in the database | | Weight | #7,897 | #7,293 | 14,005 | 590 leads by 604 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,065 | #3,677 | 14,005 | 590 leads by 388 places | ## Questions ### Which panel is better: Renewsys DESERV Extreme 144X-585 or Renewsys DESERV Extreme 144X-590? According to our database: **Renewsys DESERV Extreme 144X-590** has higher module efficiency (**22.87%** vs **22.68%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Renewsys DESERV Extreme 144X-585 and Renewsys DESERV Extreme 144X-590? **Renewsys DESERV Extreme 144X-585** has a module efficiency of **22.68%**, while **Renewsys DESERV Extreme 144X-590** is **22.87%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Renewsys DESERV Extreme 144X-585 use vs Renewsys DESERV Extreme 144X-590? **Renewsys DESERV Extreme 144X-585** uses **TOPCon** cells; **Renewsys DESERV Extreme 144X-590** 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 Renewsys DESERV Extreme 144X-585 and Renewsys DESERV Extreme 144X-590? **Renewsys DESERV Extreme 144X-585** has a **30 years** power warranty; **Renewsys DESERV Extreme 144X-590** 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 Renewsys DESERV Extreme 144X-585 and Renewsys DESERV Extreme 144X-590 bifacial panels? Both **Renewsys DESERV Extreme 144X-585** and **Renewsys DESERV Extreme 144X-590** 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 - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-610](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-610) - 6 differences, the largest is module efficiency - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-605](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-605) - 4 differences, the largest is module efficiency - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-600](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-600) - 3 differences, the largest is module efficiency - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-595](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-595) - 3 differences, the largest is module efficiency - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-580](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-580) - One difference: module efficiency - [Renewsys DESERV Extreme 144X-585 vs Renewsys DESERV Extreme 144X-575](https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-575) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/renewsys-deserv-extreme-144x-585/renewsys-deserv-extreme-144x-590 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.