--- title: "BYD NLBK-36 575 vs BYD NLBK-36 590 - Solar Panel Comparison | ComparePV" description: "Compare BYD NLBK-36 575 vs BYD NLBK-36 590 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-590" updated: 2026-09-11 --- # BYD NLBK-36 575 vs BYD NLBK-36 590 590 leads on the differences that matter The largest is module efficiency: 0.58 pp more efficient. 14 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [BYD NLBK-36 575](https://comparepv.com/panel/byd-nlbk-36-575) | [BYD NLBK-36 590](https://comparepv.com/panel/byd-nlbk-36-590) | | Manufacturer | BYD | BYD | | Power | 575 Wp | 590 Wp | | Efficiency | 22.26 % | 22.84 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 575 | 590 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.26 % | 22.84 % | +0.58 pp for 590 | | Power density | 222.6 Wp/m² | 228.4 Wp/m² | +5.8 Wp/m² for 590 | | Rated power | 575 Wp | 590 Wp | +15 W for 590 | | Open-circuit voltage | 52.38 V | 53.92 V | 1.54 V apart | | Voltage at max power | 42.99 V | 45.04 V | 2.05 V apart | ## Every compared parameter | Parameter | 575 | 590 | | --- | --- | --- | | Rated power | 575 Wp | 590 Wp | | Module efficiency | 22.26 % | 22.84 % | | Power density | 222.6 Wp/m² | 228.4 Wp/m² | | Open-circuit voltage | 52.38 V | 53.92 V | | Voltage at max power | 42.99 V | 45.04 V | | Short-circuit current | 13.80 A | 13.56 A | | Current at max power | 13.37 A | 13.10 A | | Temperature coefficient | -0.278 %/°C | -0.278 %/°C | | Dimensions | 2278x1134x30 mm | 2278x1134x30 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 32.0 kg | 32.0 kg | | Weight per kWp | 55.7 kg/kWp | 54.2 kg/kWp | | Product warranty | 12 yrs | 12 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 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 (-0.278 %/°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, 575:** 19,292 kWh - **Cumulative output, 590:** 19,796 kWh - **Gap:** 504 kWh ## Output when hot | Condition | Cell temperature | 575 | 590 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 575 W | 590 W | 100.0% of rated power | | Cool, bright day | 40 °C | 551 W | 565 W | 95.8% of rated power | | Typical summer roof | 55 °C | 527 W | 541 W | 91.7% of rated power | | Hot roof | 70 °C | 503 W | 516 W | 87.5% of rated power | ## Against the whole database | Measure | 575 | 590 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,593 | #2,617 | 14,005 | 590 leads by 2,976 places | | Power density | #5,549 | #2,598 | 14,005 | 590 leads by 2,951 places | | Heat behaviour | #1,295 | #1,295 | 14,005 | Tied - the same position in the database | | Weight | #10,019 | #8,477 | 14,005 | 590 leads by 1,542 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,950 | #3,762 | 14,005 | 590 leads by 1,188 places | ## Questions ### Which panel is better: BYD NLBK-36 575 or BYD NLBK-36 590? According to our database: **BYD NLBK-36 590** has higher module efficiency (**22.84%** vs **22.26%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of BYD NLBK-36 575 and BYD NLBK-36 590? **BYD NLBK-36 575** has a module efficiency of **22.26%**, while **BYD NLBK-36 590** is **22.84%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does BYD NLBK-36 575 use vs BYD NLBK-36 590? **BYD NLBK-36 575** uses **TOPCon** cells; **BYD NLBK-36 590** 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 BYD NLBK-36 575 and BYD NLBK-36 590? **BYD NLBK-36 575** has a **30 years** power warranty; **BYD NLBK-36 590** 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 BYD NLBK-36 575 and BYD NLBK-36 590 bifacial panels? Both **BYD NLBK-36 575** and **BYD NLBK-36 590** 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 - [BYD NLBK-36 575 vs BYD NLBK-36 600](https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-600) - 6 differences, the largest is module efficiency - [BYD NLBK-36 575 vs BYD NLBK-36 595](https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-595) - 5 differences, the largest is module efficiency - [BYD NLBK-36 575 vs BYD NLBK-36 585](https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-585) - 5 differences, the largest is module efficiency - [BYD NLBK-36 575 vs BYD NLBK-36 580](https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-580) - The same specification on paper - [BYD NLBK-36 575 vs BYD NLBK-36 570](https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-570) - The same specification on paper - [BYD NLBK-36 575 vs BYD HSBK-33-735](https://comparepv.com/compare/byd-nlbk-36-575/byd-hsbk-33-735) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/byd-nlbk-36-575/byd-nlbk-36-590 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.