--- title: "Hyundai HiS-T630NJ 630W Solar Panel - Specs & Review | ComparePV" description: "Hyundai HiS-T630NJ 630W solar panel. Specs: 22.54% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t630nj" updated: 2026-09-11 --- # Hyundai HiS-T630NJ Middle of its segment, heavy for its output 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Hyundai - **Model:** HiS-T630NJ - **Series:** NJ Series (Premium N-Type TOPCon Module) - **Rated power:** 630 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 630 W | 620 W | Typical | | | Module efficiency | 22.54% | 22.80% | Typical | 3,920 | | Power density | 225.4 | 227.7 | Typical | 3,907 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 34.7 kg | 32.7 kg | Weak - bottom 16% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.54% | 22.80% | Typical | 3,920 | | Power density | 225.4 | 227.7 | Typical | 3,907 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.1 | 53.1 | Weak - bottom 16% | 9,493 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **55.1 kg per kWp** - Bottom 16% of the TOPCon 600-650 W segment, against a median of 53.1. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 630 W - **Efficiency:** 22.54 % - **Voltage at Pmax (Vmp):** 47.41 V - **Current at Pmax (Imp):** 13.29 A - **Open-circuit voltage (Voc):** 57.36 V - **Short-circuit current (Isc):** 13.90 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.043 %/degC - **NOCT:** 41 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 - **Bifacial:** yes ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 34.7 kg - **Area:** 2.80 m2 - **Power density:** 225.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 551 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3920 of 14005 | | Power density | 3907 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9493 of 14005 | | Warranty | 21 of 14005 | ## Pros - **22.54–22.9% efficiency — segment leader** - The NJ Series reaches up to 22.9% module efficiency, matching Suntech Ultra V Pro (22.9%) and clearly outperforming REC Alpha Pro M (22.5%) and MY Solar HJT (22.61%). This translates to higher energy yield per unit of roof or ground area, reducing the overall LCOE of the installation. - **Low Pmax temperature coefficient of -0.30%/°C** - N-type TOPCon cell technology delivers a Pmax temperature coefficient of -0.30%/°C, outperforming conventional PERC modules (-0.35 to -0.40%/°C). This results in lower power losses during hot weather and a higher annual yield in temperate climates. - **30-year linear power warranty, min. 87.4%** - The manufacturer guarantees at least 87.4% of nominal power after 30 years of operation, implying an annual degradation rate of ~0.40%/year. The direct peer comparable REC Alpha Pro M offers a performance warranty for only 25 years (92% in year 25); over a 30-year horizon, the Hyundai NJ Series holds a clear advantage in bankability and NPV financial models. - **PVEL PQP Top Performer 2025** - The NJ Series earned the Top Performer designation in the Kiwa PVEL Product Quality Program (PQP) 2025, demonstrating positive results across independent climate sequence tests (DH, TC, HF). This is a key argument for bank financing and utility-scale project due diligence. - **Bifacial 80% + dual glass + 5400 Pa** - An 80% (±5%) bifaciality factor allows the capture of 19–25% additional energy from ground-reflected irradiance in ground-mount and carport installations. Dual 2.0 mm AR-coated glass and a 5400 Pa mechanical load rating (front and rear) qualify the series for industrial facilities and high-snow-load regions. ## Cons - **Only 12-year product warranty** - The Hyundai NJ Series carries a 12-year product warranty covering material and workmanship defects, while the direct peer comparable REC Alpha Pro M provides 20 years (extendable to 25 years under the ProTrust program). The shorter coverage period may be a limiting factor for projects where lenders require a minimum 15-year product warranty — a common clause in EPC and project finance agreements. ## About this series Hyundai NJ Series (Premium N-Type TOPCon Module) are modules designed for maximizing energy yield in real-world operating conditions - beyond the laboratory. The use of **N-Type TOPCon cells** enables better light utilization under low irradiance conditions and higher parameter stability over time, translating to predictable production and peace of mind for the investor. In practice, this is an excellent choice where high yield per square meter and resistance to typical operational losses matter. What sets this series apart from many standard modules is its **bifacial construction**, allowing the panels to also operate "from the back," utilizing reflected light from the ground. Combined with **double glazing**, the NJ series performs exceptionally well on ground-mounted constructions, flat roofs, carports, and industrial installations, where environmental conditions can be demanding. An additional argument is the **long warranty protection**, crucial for projects focused on multi-year returns and bankability. ## Notable figures - At 22.5% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - Power density of 225.4 W/m² matches the \*\*TOPCon 600-650W\*\* median - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - Weight of 34.7 kg is 2.0 kg above \*\*TOPCon 600-650W\*\* median (32.7 kg) - verify structural support - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### How does the N-Type TOPCon cell technology in the Hyundai NJ Series compare to standard PERC modules? N-Type TOPCon cells in the NJ Series deliver lower annual degradation (approx. 0.4% after year one) and better performance at elevated temperatures compared to PERC. Hyundai backs the NJ Series with a 30-year linear power warranty guaranteeing at least 87.4% of nominal output at year 30, while typical PERC modules usually warranty 80–83% at the same point. In practice, this means measurably higher lifetime energy yield over the full project horizon. ### What warranties come with the Hyundai NJ Series panels, and who backs them? The NJ Series includes a 12-year product workmanship warranty and a 30-year linear power output warranty. First-year degradation is capped at 1%, with a maximum of 0.4% per year thereafter. At year 30, the module is guaranteed to retain at least 87.4% of its nominal power. All warranties are backed by Hyundai Energy Solutions, a Tier 1 South Korean manufacturer recognized by leading PV market analysts. ### Do bifacial Hyundai NJ panels actually produce more energy than standard monofacial modules? Yes — under favorable conditions, the bifacial design of the NJ Series can capture up to 19% additional energy from the module's rear side using light reflected off the ground or surrounding surfaces (80% bifaciality factor). The gain is most significant on ground-mount systems, carports, and flat roofs with bright or gravel surfaces. On dark-colored pitched roofs, rear-side gain will be minimal, making bifacial output less relevant for typical residential rooftop installations. ### Is the Hyundai NJ 640W panel a good fit for commercial rooftops or utility-scale PV farms? Absolutely. The 640 W power class and ~2465 × 1134 mm form factor are standard for commercial and utility-scale segments. Dual-glass construction, a 5,400 Pa snow load rating, and a 2,400 Pa wind load rating make the module resilient in demanding environments. The NJ Series is well-suited for ground-mount farms, large industrial rooftops, and carports where maximizing output per square meter and long-term bankability are top priorities. ### How does the Hyundai NJ Series perform in overcast or cold conditions typical of Central European climates? N-Type TOPCon cells have a more favorable temperature coefficient than PERC, meaning lower power losses on hot days. In diffuse or low-irradiance conditions, TOPCon technology converts scattered light more efficiently than older P-Type cells. With a module efficiency of approximately 22.9%, the NJ Series maintains a solid energy yield in climates like Poland's, where cloudy days are frequent and consistent low-light performance directly impacts annual LCOE. ### How heavy is the Hyundai NJ 640W module, and is it practical for residential rooftop installation? The Hyundai NJ 640W module weighs approximately 34.5 kg (76.1 lbs) and measures 2465 × 1134 × 35 mm, which is standard for large commercial panels rather than residential ones. Due to its size and weight, it is not the ideal choice for small pitched residential rooftops. Its natural environment is ground-mount systems, flat commercial rooftops, and carports, where handling logistics, structural loading, and service access are more manageable. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hd-hyundai-energy-solutions-pv-module-commercial-nj-datashee-6173303d3c91.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +50 W, lighter, +2.7 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +45 W, lighter, +2.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +40 W, lighter, +2.3 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +40 W, lighter, +2.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +2.3 pp | | [Hyundai HiS-T635NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t635nj) | 635 W | Very close match | | [Hyundai HiS-T640NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t640nj) | 640 W | +10 W, +0.4 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +70 W, cooler, +2.5 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +65 W, cooler, +2.4 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +40 W, cooler, +2.3 pp | --- Source: https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t630nj Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.