--- title: "Hyundai HiS-T640NJ vs Hyundai HiT-H440LE-FB(ZB) - Solar Panel Comparison | ComparePV" description: "Compare Hyundai HiS-T640NJ vs Hyundai HiT-H440LE-FB(ZB) side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hyundai-hit-h440le-fb-zb" updated: 2026-09-11 --- # Hyundai HiS-T640NJ vs Hyundai HiT-H440LE-FB(ZB) 16 differences, and they point both ways The largest is module efficiency: 0.90 pp more efficient. 3 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Hyundai HiS-T640NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t640nj) | [Hyundai HiT-H440LE-FB(ZB)](https://comparepv.com/panel/hyundai-hit-h440le-fb-zb) | | Manufacturer | Hyundai | Hyundai | | Power | 640 Wp | 440 Wp | | Efficiency | 22.90 % | 22.00 % | | Technology | TOPCon | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | HiS-T640NJ | HiT-H440LE-FB(ZB) | Difference | | --- | --- | --- | --- | | Module efficiency | 22.90 % | 22.00 % | +0.90 pp for HiS-T640NJ | | Temperature coefficient | -0.290 %/°C | -0.240 %/°C | +0.050 %/°C for HiT-H440LE-FB(ZB) | | Rated power | 640 Wp | 440 Wp | +200 W for HiS-T640NJ | | Weight | 34.7 kg | 21.6 kg | -13.1 kg for HiT-H440LE-FB(ZB) | | Product warranty | 12 yrs | 30 yrs | +18 yrs for HiT-H440LE-FB(ZB) | | Power density | 229.0 Wp/m² | 220.2 Wp/m² | +8.7 Wp/m² for HiS-T640NJ | | Annual degradation | 0.40 %/yr | 0.30 %/yr | -0.10 %/yr for HiT-H440LE-FB(ZB) | | Open-circuit voltage | 57.77 V | 36.52 V | 21.25 V apart | | Module area | 2.795 m² | 1.998 m² | 0.797 m² apart | | Weight per kWp | 54.2 kg/kWp | 49.1 kg/kWp | -5.1 kg/kWp for HiT-H440LE-FB(ZB) | | Short-circuit current | 14.06 A | 15.31 A | 1.25 A apart | | Cell technology | TOPCon | HJT | TOPCon vs HJT | | Voltage at max power | 47.74 V | 30.61 V | 17.13 V apart | | Cell count | 156 | 96 | 60 cells apart | | Dimensions | 2465x1134x30 mm | 1762x1134x30 mm | 2465x1134x30 mm vs 1762x1134x30 mm | | Current at max power | 13.41 A | 14.38 A | 0.97 A apart | ## Every compared parameter | Parameter | HiS-T640NJ | HiT-H440LE-FB(ZB) | | --- | --- | --- | | Rated power | 640 Wp | 440 Wp | | Module efficiency | 22.90 % | 22.00 % | | Power density | 229.0 Wp/m² | 220.2 Wp/m² | | Open-circuit voltage | 57.77 V | 36.52 V | | Voltage at max power | 47.74 V | 30.61 V | | Short-circuit current | 14.06 A | 15.31 A | | Current at max power | 13.41 A | 14.38 A | | Temperature coefficient | -0.290 %/°C | -0.240 %/°C | | Dimensions | 2465x1134x30 mm | 1762x1134x30 mm | | Module area | 2.795 m² | 1.998 m² | | Weight | 34.7 kg | 21.6 kg | | Weight per kWp | 54.2 kg/kWp | 49.1 kg/kWp | | Product warranty | 12 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.30 %/yr | | Cell technology | TOPCon | HJT | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 96 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, HiS-T640NJ:** 21,473 kWh - **Cumulative output, HiT-H440LE-FB(ZB):** 14,993 kWh - **Gap:** 6,480 kWh ## Output when hot | Condition | Cell temperature | HiS-T640NJ | HiT-H440LE-FB(ZB) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 440 W | 100.0% of rated power | | Cool, bright day | 40 °C | 612 W | 424 W | 95.7% of rated power | | Typical summer roof | 55 °C | 584 W | 408 W | 91.3% of rated power | | Hot roof | 70 °C | 556 W | 392 W | 87.0% of rated power | ## Against the whole database | Measure | HiS-T640NJ | HiT-H440LE-FB(ZB) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,359 | #6,517 | 14,005 | HiS-T640NJ leads by 4,158 places | | Power density | #2,389 | #6,328 | 14,005 | HiS-T640NJ leads by 3,939 places | | Heat behaviour | #2,165 | #13 | 14,005 | HiT-H440LE-FB(ZB) leads by 2,152 places | | Weight | #8,447 | #2,739 | 14,005 | HiT-H440LE-FB(ZB) leads by 5,708 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,090 | #5,958 | 14,005 | HiS-T640NJ leads by 3,868 places | ## Questions ### Which panel is better: Hyundai HiS-T640NJ or Hyundai HiT-H440LE-FB(ZB)? According to our database: **Hyundai HiS-T640NJ** has higher module efficiency (**22.90%** vs **22.00%**); **Hyundai HiT-H440LE-FB(ZB)** tolerates heat better (temp coeff **-0.240%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Hyundai HiS-T640NJ and Hyundai HiT-H440LE-FB(ZB)? **Hyundai HiS-T640NJ** has a module efficiency of **22.90%**, while **Hyundai HiT-H440LE-FB(ZB)** is **22.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Hyundai HiS-T640NJ use vs Hyundai HiT-H440LE-FB(ZB)? **Hyundai HiS-T640NJ** uses **TOPCon** cells; **Hyundai HiT-H440LE-FB(ZB)** uses **HJT**. 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 Hyundai HiS-T640NJ and Hyundai HiT-H440LE-FB(ZB)? **Hyundai HiS-T640NJ** has a **30 years** power warranty; **Hyundai HiT-H440LE-FB(ZB)** 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 Hyundai HiS-T640NJ and Hyundai HiT-H440LE-FB(ZB) bifacial panels? Both **Hyundai HiS-T640NJ** and **Hyundai HiT-H440LE-FB(ZB)** 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 - [Hyundai HiS-T640NJ vs Hyundai HiS-T635NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hd-hyundai-energy-solutions-his-t635nj) - The same specification on paper - [Hyundai HiS-T640NJ vs Hyundai HiS-T630NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hd-hyundai-energy-solutions-his-t630nj) - 3 differences, the largest is module efficiency - [Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H460LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h440le-fb-zb/hyundai-hit-h460le-fb-zb) - 4 differences, the largest is module efficiency - [Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H455LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h440le-fb-zb/hyundai-hit-h455le-fb-zb) - 3 differences, the largest is module efficiency - [Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H450LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h440le-fb-zb/hyundai-hit-h450le-fb-zb) - 3 differences, the largest is module efficiency - [Hyundai HiT-H440LE-FB(ZB) vs Hyundai HiT-H445LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h440le-fb-zb/hyundai-hit-h445le-fb-zb) - One difference: module efficiency --- Source: https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hyundai-hit-h440le-fb-zb 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.