--- title: "Hyundai HiS-T640NJ vs Hyundai HiE-S430HG(FB) - Solar Panel Comparison | ComparePV" description: "Compare Hyundai HiS-T640NJ vs Hyundai HiE-S430HG(FB) 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-energy-solutions-hie-s430hg-fb" image: "https://comparepv.com/og/compare/panels/hd-hyundai-energy-solutions-his-t640nj/hyundai-energy-solutions-hie-s430hg-fb.png" updated: 2026-09-11 --- # Hyundai HiS-T640NJ vs Hyundai HiE-S430HG(FB) HiS-T640NJ leads on the differences that matter The largest is module efficiency: 2.20 pp more efficient. 1 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Hyundai HiS-T640NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t640nj) | [Hyundai HiE-S430HG(FB)](https://comparepv.com/panel/hyundai-energy-solutions-hie-s430hg-fb) | | Manufacturer | Hyundai | Hyundai | | Power | 640 Wp | 430 Wp | | Efficiency | 22.90 % | 20.70 % | | Technology | TOPCon | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | HiS-T640NJ | HiE-S430HG(FB) | Difference | | --- | --- | --- | --- | | Module efficiency | 22.90 % | 20.70 % | +2.20 pp for HiS-T640NJ | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | +0.050 %/°C for HiS-T640NJ | | Rated power | 640 Wp | 430 Wp | +210 W for HiS-T640NJ | | Power density | 229.0 Wp/m² | 206.6 Wp/m² | +22.4 Wp/m² for HiS-T640NJ | | Performance warranty | 30 yrs | 25 yrs | +5 yrs for HiS-T640NJ | | Annual degradation | 0.40 %/yr | 0.55 %/yr | -0.15 %/yr for HiS-T640NJ | | Weight | 34.7 kg | 21.8 kg | -12.9 kg for HiE-S430HG(FB) | | Product warranty | 12 yrs | 25 yrs | +13 yrs for HiE-S430HG(FB) | | Open-circuit voltage | 57.77 V | 43.50 V | 14.27 V apart | | Module area | 2.795 m² | 2.081 m² | 0.714 m² apart | | Short-circuit current | 14.06 A | 12.68 A | 1.38 A apart | | Weight per kWp | 54.2 kg/kWp | 50.7 kg/kWp | -3.5 kg/kWp for HiE-S430HG(FB) | | Cell technology | TOPCon | PERC | TOPCon vs PERC | | Voltage at max power | 47.74 V | 36.10 V | 11.64 V apart | | Bifacial | Yes | No | Yes vs No | | Current at max power | 13.41 A | 11.92 A | 1.49 A apart | | Dimensions | 2465x1134x30 mm | 1899x1096x30 mm | 2465x1134x30 mm vs 1899x1096x30 mm | ## Every compared parameter | Parameter | HiS-T640NJ | HiE-S430HG(FB) | | --- | --- | --- | | Rated power | 640 Wp | 430 Wp | | Module efficiency | 22.90 % | 20.70 % | | Power density | 229.0 Wp/m² | 206.6 Wp/m² | | Open-circuit voltage | 57.77 V | 43.50 V | | Voltage at max power | 47.74 V | 36.10 V | | Short-circuit current | 14.06 A | 12.68 A | | Current at max power | 13.41 A | 11.92 A | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | | Dimensions | 2465x1134x30 mm | 1899x1096x30 mm | | Module area | 2.795 m² | 2.081 m² | | Weight | 34.7 kg | 21.8 kg | | Weight per kWp | 54.2 kg/kWp | 50.7 kg/kWp | | Product warranty | 12 yrs | 25 yrs | | Performance warranty | 30 yrs | 25 yrs | | Annual degradation | 0.40 %/yr | 0.55 %/yr | | Cell technology | TOPCon | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | - | | Bifacial | Yes | No | ## 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, HiE-S430HG(FB):** 13,936 kWh - **Gap:** 7,537 kWh ## Output when hot | Condition | Cell temperature | HiS-T640NJ | HiE-S430HG(FB) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 430 W | 100.0% of rated power | | Cool, bright day | 40 °C | 612 W | 408 W | 94.9% of rated power | | Typical summer roof | 55 °C | 584 W | 386 W | 89.8% of rated power | | Hot roof | 70 °C | 556 W | 364 W | 84.7% of rated power | ## Against the whole database | Measure | HiS-T640NJ | HiE-S430HG(FB) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,412 | #10,842 | 14,129 | HiS-T640NJ leads by 8,430 places | | Power density | #2,443 | #11,053 | 14,129 | HiS-T640NJ leads by 8,610 places | | Heat behaviour | #2,220 | #8,846 | 14,129 | HiS-T640NJ leads by 6,626 places | | Weight | #8,527 | #4,136 | 14,129 | HiE-S430HG(FB) leads by 4,391 places | | Warranty | #21 | #9,912 | 14,129 | HiS-T640NJ leads by 9,891 places | | Overall | #2,117 | #10,006 | 14,129 | HiS-T640NJ leads by 7,889 places | ## Questions ### Which panel is better: Hyundai HiS-T640NJ or Hyundai HiE-S430HG(FB)? According to our database: **Hyundai HiS-T640NJ** has higher module efficiency (**22.90%** vs **20.70%**); **Hyundai HiS-T640NJ** tolerates heat better (temp coeff **-0.290%/°C** vs **-0.340%/°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 HiE-S430HG(FB)? **Hyundai HiS-T640NJ** has a module efficiency of **22.90%**, while **Hyundai HiE-S430HG(FB)** is **20.70%**. 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 HiE-S430HG(FB)? **Hyundai HiS-T640NJ** uses **TOPCon** cells; **Hyundai HiE-S430HG(FB)** uses **PERC**. 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 HiE-S430HG(FB)? **Hyundai HiS-T640NJ** has a **30 years** power warranty; **Hyundai HiE-S430HG(FB)** has a **25 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 HiE-S430HG(FB) bifacial panels? **Hyundai HiS-T640NJ** is bifacial (captures light from both faces); **Hyundai HiE-S430HG(FB)** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## 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 HiE-S430HG(FB) vs Hyundai HiE-S445HG](https://comparepv.com/compare/hyundai-energy-solutions-hie-s430hg-fb/hyundai-energy-solutions-hie-s445hg) - 3 differences, the largest is module efficiency - [Hyundai HiE-S430HG(FB) vs Hyundai HiE-S445HG(FB)](https://comparepv.com/compare/hyundai-energy-solutions-hie-s430hg-fb/hyundai-energy-solutions-hie-s445hg-fb) - 3 differences, the largest is module efficiency - [Hyundai HiE-S430HG(FB) vs Hyundai HiE-S440HG](https://comparepv.com/compare/hyundai-energy-solutions-hie-s430hg-fb/hyundai-energy-solutions-hie-s440hg) - 3 differences, the largest is module efficiency - [Hyundai HiE-S430HG(FB) vs Hyundai HiE-S440HG(FB)](https://comparepv.com/compare/hyundai-energy-solutions-hie-s430hg-fb/hyundai-energy-solutions-hie-s440hg-fb) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hyundai-energy-solutions-hie-s430hg-fb 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.