--- title: "BYD HSBK-33-720 vs BYD NLBK-36-590 - Solar Panel Comparison | ComparePV" description: "Compare BYD HSBK-33-720 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-hsbk-33-720/byd-nlbk-36-590-1" image: "https://comparepv.com/og/compare/panels/byd-hsbk-33-720/byd-nlbk-36-590-1.png" updated: 2026-09-11 --- # BYD HSBK-33-720 vs BYD NLBK-36-590 HSBK-33-720 leads on the differences that matter The largest is temperature coefficient: 0.060 %/°C better in heat. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [BYD HSBK-33-720](https://comparepv.com/panel/byd-hsbk-33-720) | [BYD NLBK-36-590](https://comparepv.com/panel/byd-nlbk-36-590-1) | | Manufacturer | BYD | BYD | | Power | 720 Wp | 590 Wp | | Efficiency | 23.18 % | 22.84 % | | Technology | HJT | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | HSBK-33-720 | NLBK-36-590 | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.240 %/°C | -0.300 %/°C | +0.060 %/°C for HSBK-33-720 | | Rated power | 720 Wp | 590 Wp | +130 W for HSBK-33-720 | | Weight | 38.3 kg | 32.0 kg | -6.3 kg for NLBK-36-590 | | Module efficiency | 23.18 % | 22.84 % | +0.34 pp for HSBK-33-720 | | Short-circuit current | 18.17 A | 14.63 A | 3.54 A apart | | Module area | 3.106 m² | 2.583 m² | 0.523 m² apart | | Cell technology | HJT | TOPCon | HJT vs TOPCon | | Power density | 231.8 Wp/m² | 228.4 Wp/m² | +3.4 Wp/m² for HSBK-33-720 | | Current at max power | 17.10 A | 13.84 A | 3.26 A apart | | Cell count | 132 | 144 | 12 cells apart | | Open-circuit voltage | 50.17 V | 51.28 V | 1.11 V apart | | Dimensions | 2384x1303x33 mm | 2278x1134x30 mm | 2384x1303x33 mm vs 2278x1134x30 mm | ## Every compared parameter | Parameter | HSBK-33-720 | NLBK-36-590 | | --- | --- | --- | | Rated power | 720 Wp | 590 Wp | | Module efficiency | 23.18 % | 22.84 % | | Power density | 231.8 Wp/m² | 228.4 Wp/m² | | Open-circuit voltage | 50.17 V | 51.28 V | | Voltage at max power | 42.14 V | 42.66 V | | Short-circuit current | 18.17 A | 14.63 A | | Current at max power | 17.10 A | 13.84 A | | Temperature coefficient | -0.240 %/°C | -0.300 %/°C | | Dimensions | 2384x1303x33 mm | 2278x1134x30 mm | | Module area | 3.106 m² | 2.583 m² | | Weight | 38.3 kg | 32.0 kg | | Weight per kWp | 53.2 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 | HJT | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, HSBK-33-720:** 24,157 kWh - **Cumulative output, NLBK-36-590:** 19,796 kWh - **Gap:** 4,361 kWh ## Output when hot | Condition | Cell temperature | HSBK-33-720 | NLBK-36-590 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 720 W | 590 W | 100.0% of rated power | | Cool, bright day | 40 °C | 694 W | 563 W | 95.5% of rated power | | Typical summer roof | 55 °C | 668 W | 537 W | 91.0% of rated power | | Hot roof | 70 °C | 642 W | 510 W | 86.5% of rated power | ## Against the whole database | Measure | HSBK-33-720 | NLBK-36-590 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,468 | #2,672 | 14,129 | HSBK-33-720 leads by 1,204 places | | Power density | #1,390 | #2,653 | 14,129 | HSBK-33-720 leads by 1,263 places | | Heat behaviour | #13 | #6,152 | 14,129 | HSBK-33-720 leads by 6,139 places | | Weight | #7,089 | #8,557 | 14,129 | HSBK-33-720 leads by 1,468 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #550 | #3,812 | 14,129 | HSBK-33-720 leads by 3,262 places | ## Questions ### Which panel is better: BYD HSBK-33-720 or BYD NLBK-36-590? According to our database: **BYD HSBK-33-720** has higher module efficiency (**23.18%** vs **22.84%**); **BYD HSBK-33-720** tolerates heat better (temp coeff **-0.240%/°C** vs **-0.300%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of BYD HSBK-33-720 and BYD NLBK-36-590? **BYD HSBK-33-720** has a module efficiency of **23.18%**, 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 HSBK-33-720 use vs BYD NLBK-36-590? **BYD HSBK-33-720** uses **HJT** 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 HSBK-33-720 and BYD NLBK-36-590? **BYD HSBK-33-720** 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 HSBK-33-720 and BYD NLBK-36-590 bifacial panels? Both **BYD HSBK-33-720** 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 HSBK-33-720 vs BYD HSBK-33-735](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-735) - 3 differences, the largest is module efficiency - [BYD HSBK-33-720 vs BYD HSBK-33-730](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-730) - 3 differences, the largest is module efficiency - [BYD HSBK-33-720 vs BYD HSBK-33-725](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-725) - The same specification on paper - [BYD HSBK-33-720 vs BYD HSBK-33-715](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-715) - The same specification on paper - [BYD HSBK-33-720 vs BYD HSBK-33-710](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-710) - 3 differences, the largest is module efficiency - [BYD HSBK-33-720 vs BYD HSBK-33-705](https://comparepv.com/compare/byd-hsbk-33-720/byd-hsbk-33-705) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/byd-hsbk-33-720/byd-nlbk-36-590-1 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.