--- title: "Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG595-N144M10 - Solar Panel Comparison | ComparePV" description: "Compare Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG595-N144M10 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg595-n144m10" image: "https://comparepv.com/og/compare/panels/sunpro-spdg590-n144m10/sunpro-spdg595-n144m10.png" updated: 2026-09-11 --- # Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG595-N144M10 Identical on every published parameter All 19 comparable parameters agree. 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 | [Sunpro Power SPDG590-N144M10](https://comparepv.com/panel/sunpro-spdg590-n144m10) | [Sunpro Power SPDG595-N144M10](https://comparepv.com/panel/sunpro-spdg595-n144m10) | | Manufacturer | Sunpro Power | Sunpro Power | | Power | 590 Wp | 595 Wp | | Efficiency | 22.83 % | 23.02 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | SPDG590-N144M10 | SPDG595-N144M10 | | --- | --- | --- | | Rated power | 590 Wp | 595 Wp | | Module efficiency | 22.83 % | 23.02 % | | Power density | 228.4 Wp/m² | 230.3 Wp/m² | | Open-circuit voltage | 51.70 V | 51.84 V | | Voltage at max power | 42.87 V | 43.03 V | | Short-circuit current | 14.48 A | 14.55 A | | Current at max power | 13.77 A | 13.83 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2278x1134x30 mm | 2278x1134x30 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 31.0 kg | 31.0 kg | | Weight per kWp | 52.5 kg/kWp | 52.1 kg/kWp | | Product warranty | 25 yrs | 25 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 | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, 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, SPDG590-N144M10:** 19,796 kWh - **Cumulative output, SPDG595-N144M10:** 19,963 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | SPDG590-N144M10 | SPDG595-N144M10 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 590 W | 595 W | 100.0% of rated power | | Cool, bright day | 40 °C | 563 W | 568 W | 95.5% of rated power | | Typical summer roof | 55 °C | 537 W | 541 W | 91.0% of rated power | | Hot roof | 70 °C | 510 W | 515 W | 86.5% of rated power | ## Against the whole database | Measure | SPDG590-N144M10 | SPDG595-N144M10 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,738 | #1,847 | 14,129 | SPDG595-N144M10 leads by 891 places | | Power density | #2,653 | #1,809 | 14,129 | SPDG595-N144M10 leads by 844 places | | Heat behaviour | #6,152 | #6,152 | 14,129 | Tied - the same position in the database | | Weight | #6,201 | #5,590 | 14,129 | SPDG595-N144M10 leads by 611 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #1,588 | #1,427 | 14,129 | SPDG595-N144M10 leads by 161 places | ## Questions ### Which panel is better: Sunpro Power SPDG590-N144M10 or Sunpro Power SPDG595-N144M10? According to our database: **Sunpro Power SPDG595-N144M10** has higher module efficiency (**23.02%** vs **22.83%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sunpro Power SPDG590-N144M10 and Sunpro Power SPDG595-N144M10? **Sunpro Power SPDG590-N144M10** has a module efficiency of **22.83%**, while **Sunpro Power SPDG595-N144M10** is **23.02%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Sunpro Power SPDG590-N144M10 use vs Sunpro Power SPDG595-N144M10? **Sunpro Power SPDG590-N144M10** uses **TOPCon** cells; **Sunpro Power SPDG595-N144M10** 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 Sunpro Power SPDG590-N144M10 and Sunpro Power SPDG595-N144M10? **Sunpro Power SPDG590-N144M10** has a **30 years** power warranty; **Sunpro Power SPDG595-N144M10** 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 Sunpro Power SPDG590-N144M10 and Sunpro Power SPDG595-N144M10 bifacial panels? Both **Sunpro Power SPDG590-N144M10** and **Sunpro Power SPDG595-N144M10** 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 - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG600-N144M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg600-n144m10) - 3 differences, the largest is module efficiency - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG585-N144M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg585-n144m10) - One difference: bifacial - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG500-N120M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg500-n120m10) - 8 differences, the largest is rated power - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG495-N120M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg495-n120m10) - 7 differences, the largest is rated power - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG490-N120M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg490-n120m10) - 9 differences, the largest is rated power - [Sunpro Power SPDG590-N144M10 vs Sunpro Power SPDG485-N120M10](https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg485-n120m10) - 10 differences, the largest is rated power --- Source: https://comparepv.com/compare/sunpro-spdg590-n144m10/sunpro-spdg595-n144m10 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.