--- title: "Hyundai HiS-T630NJ vs Hyundai HIE-S405VG - Solar Panel Comparison | ComparePV" description: "Compare Hyundai HiS-T630NJ vs Hyundai HIE-S405VG 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-t630nj/hyundai-hie-s405vg" image: "https://comparepv.com/og/compare/panels/hd-hyundai-energy-solutions-his-t630nj/hyundai-hie-s405vg.png" updated: 2026-09-11 --- # Hyundai HiS-T630NJ vs Hyundai HIE-S405VG HiS-T630NJ leads on the differences that matter The largest is module efficiency: 1.84 pp more efficient. 2 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-T630NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t630nj) | [Hyundai HIE-S405VG](https://comparepv.com/panel/hyundai-hie-s405vg) | | Manufacturer | Hyundai | Hyundai | | Power | 630 Wp | 405 Wp | | Efficiency | 22.54 % | 20.70 % | | Technology | TOPCon | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | HiS-T630NJ | HIE-S405VG | Difference | | --- | --- | --- | --- | | Module efficiency | 22.54 % | 20.70 % | +1.84 pp for HiS-T630NJ | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | +0.050 %/°C for HiS-T630NJ | | Rated power | 630 Wp | 405 Wp | +225 W for HiS-T630NJ | | Power density | 225.4 Wp/m² | 206.7 Wp/m² | +18.7 Wp/m² for HiS-T630NJ | | Performance warranty | 30 yrs | 25 yrs | +5 yrs for HiS-T630NJ | | Annual degradation | 0.40 %/yr | 0.55 %/yr | -0.15 %/yr for HiS-T630NJ | | Weight | 34.7 kg | 22.0 kg | -12.7 kg for HIE-S405VG | | Product warranty | 12 yrs | 25 yrs | +13 yrs for HIE-S405VG | | Open-circuit voltage | 57.36 V | 46.50 V | 10.86 V apart | | Short-circuit current | 13.90 A | 11.02 A | 2.88 A apart | | Module area | 2.795 m² | 1.960 m² | 0.836 m² apart | | Cell technology | TOPCon | PERC | TOPCon vs PERC | | Voltage at max power | 47.41 V | 38.70 V | 8.71 V apart | | Current at max power | 13.29 A | 10.47 A | 2.82 A apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2465x1134x30 mm | 1719x1140x35 mm | 2465x1134x30 mm vs 1719x1140x35 mm | ## Every compared parameter | Parameter | HiS-T630NJ | HIE-S405VG | | --- | --- | --- | | Rated power | 630 Wp | 405 Wp | | Module efficiency | 22.54 % | 20.70 % | | Power density | 225.4 Wp/m² | 206.7 Wp/m² | | Open-circuit voltage | 57.36 V | 46.50 V | | Voltage at max power | 47.41 V | 38.70 V | | Short-circuit current | 13.90 A | 11.02 A | | Current at max power | 13.29 A | 10.47 A | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | | Dimensions | 2465x1134x30 mm | 1719x1140x35 mm | | Module area | 2.795 m² | 1.960 m² | | Weight | 34.7 kg | 22.0 kg | | Weight per kWp | 55.1 kg/kWp | 54.3 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-T630NJ:** 21,138 kWh - **Cumulative output, HIE-S405VG:** 13,126 kWh - **Gap:** 8,012 kWh ## Output when hot | Condition | Cell temperature | HiS-T630NJ | HIE-S405VG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 630 W | 405 W | 100.0% of rated power | | Cool, bright day | 40 °C | 603 W | 384 W | 94.9% of rated power | | Typical summer roof | 55 °C | 575 W | 364 W | 89.8% of rated power | | Hot roof | 70 °C | 548 W | 343 W | 84.7% of rated power | ## Against the whole database | Measure | HiS-T630NJ | HIE-S405VG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,979 | #10,842 | 14,129 | HiS-T630NJ leads by 6,863 places | | Power density | #3,966 | #11,043 | 14,129 | HiS-T630NJ leads by 7,077 places | | Heat behaviour | #2,220 | #8,846 | 14,129 | HiS-T630NJ leads by 6,626 places | | Weight | #9,577 | #8,666 | 14,129 | HIE-S405VG leads by 911 places | | Warranty | #21 | #9,912 | 14,129 | HiS-T630NJ leads by 9,891 places | | Overall | #2,735 | #10,549 | 14,129 | HiS-T630NJ leads by 7,814 places | ## Questions ### Which panel is better: Hyundai HiS-T630NJ or Hyundai HIE-S405VG? According to our database: **Hyundai HiS-T630NJ** has higher module efficiency (**22.54%** vs **20.70%**); **Hyundai HiS-T630NJ** 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-T630NJ and Hyundai HIE-S405VG? **Hyundai HiS-T630NJ** has a module efficiency of **22.54%**, while **Hyundai HIE-S405VG** is **20.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Hyundai HiS-T630NJ use vs Hyundai HIE-S405VG? **Hyundai HiS-T630NJ** uses **TOPCon** cells; **Hyundai HIE-S405VG** 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-T630NJ and Hyundai HIE-S405VG? **Hyundai HiS-T630NJ** has a **30 years** power warranty; **Hyundai HIE-S405VG** 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-T630NJ and Hyundai HIE-S405VG bifacial panels? **Hyundai HiS-T630NJ** is bifacial (captures light from both faces); **Hyundai HIE-S405VG** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Hyundai HiS-T630NJ vs Hyundai HiS-T640NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t630nj/hd-hyundai-energy-solutions-his-t640nj) - 3 differences, the largest is module efficiency - [Hyundai HiS-T630NJ vs Hyundai HiS-T635NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t630nj/hd-hyundai-energy-solutions-his-t635nj) - The same specification on paper - [Hyundai HIE-S405VG vs Hyundai HIE-S410VG](https://comparepv.com/compare/hyundai-hie-s405vg/hyundai-hie-s410vg) - One difference: module efficiency - [Hyundai HIE-S405VG vs Hyundai HIE-S400VG](https://comparepv.com/compare/hyundai-hie-s405vg/hyundai-hie-s400vg) - One difference: module efficiency - [Hyundai HIE-S405VG vs Hyundai HIE-S395VG](https://comparepv.com/compare/hyundai-hie-s405vg/hyundai-hie-s395vg) - 3 differences, the largest is module efficiency - [Hyundai HIE-S405VG vs Hyundai HIE-S390VG](https://comparepv.com/compare/hyundai-hie-s405vg/hyundai-hie-s390vg) - 4 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t630nj/hyundai-hie-s405vg 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.