--- title: "Hiwatt Solar HW-M10/108H-460 460W Solar Panel - Specs & Review | ComparePV" description: "Hiwatt Solar HW-M10/108H-460 460W solar panel. Specs: 23.02% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-460" updated: 2026-09-11 --- # Hiwatt Solar HW-M10/108H-460 Light for its output, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Hiwatt Solar - **Model:** HW-M10/108H-460 - **Series:** HW-M10/108H - **Rated power:** 460 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 460 W | 465 W | Typical | | | Module efficiency | 23.02% | 22.52% | Strong - top 17% | 1,797 | | Power density | 230.2 | 225.2 | Strong - top 20% | 1,876 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 3% | 8,778 | | Weight (kg) | 21.0 kg | 24.0 kg | Strong - top 11% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 3% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.02% | 22.52% | Strong - top 17% | 1,797 | | Power density | 230.2 | 225.2 | Strong - top 20% | 1,876 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 3% | 8,778 | | Weight per kWp | 45.7 | 52.2 | Strong - top 11% | 805 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 3% | 9,798 | ### Strengths - **45.7 kg per kWp** - Top 11% of the TOPCon 450-500 W segment, against a median of 52.2. - **23.02% module efficiency** - Top 17% of the TOPCon 450-500 W segment, against a median of 22.52%. - **230.2 watts per square metre** - Top 20% of the TOPCon 450-500 W segment, against a median of 225.2. ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 3% of the TOPCon 450-500 W segment, against a median of -0.290. Ranked 8,778th in the whole database. - **25 year performance warranty** - Bottom 3% of the TOPCon 450-500 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 460 W - **Efficiency:** 23.02 % - **Voltage at Pmax (Vmp):** 33.60 V - **Current at Pmax (Imp):** 13.69 A - **Open-circuit voltage (Voc):** 40.17 V - **Short-circuit current (Isc):** 14.14 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 2.00 m2 - **Power density:** 230.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 377 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1797 of 14005 | | Power density | 1876 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 805 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Up to 23.02% efficiency – top of segment** - The maximum module efficiency of 23.02% places the HW-M10/108H series on par with SunKean SKT440~460M12-96D4 (23.02%) and above Risen RSM96-11-440-460BNDG (23.00%) and Zonergy ZPM MH3-72 (21.16%). The 1.86 percentage-point advantage over Zonergy translates to meaningfully higher power output from the same roof area. - **N-type TOPCon: zero LID/LeTID** - N-type TOPCon cells are fully immune to light-induced degradation (LID) and light- and elevated temperature-induced degradation (LeTID), which can reduce P-type PERC output by 1–3% within the first months of operation. Annual degradation for TOPCon sits at 0.4–0.5% vs. 0.6–0.8% for PERC, delivering a meaningfully higher cumulative energy yield over a 25-year system life. - **Lower temperature coefficient** - TOPCon N-type cells achieve a Pmax temperature coefficient of approximately –0.30%/°C, versus –0.34%/°C for standard PERC modules. At typical Polish summer cell temperatures of 50–60°C, this translates to roughly 0.7–1.4% higher instantaneous power output during peak irradiance hours. - **Half-cut cells + MBB: shade resilience** - Half-cut cell geometry shortens current paths and reduces resistive losses, while Multi-Busbar (MBB) interconnection lowers microcracks risk and improves current collection under partial shading — a critical advantage for rooftop installations in Poland where chimneys, antennas, and neighboring structures are common shading sources. - **5 power variants: 440–460 Wp** - The series spans 5 binning steps in 5 Wp increments across the 440–460 Wp range, simplifying string configuration to match specific inverter MPPT voltage windows and roof area constraints without requiring power optimizers. ## Cons - **Not BNEF Tier-1 bankable** - Hiwatt Solar does not appear on the BNEF bankable module manufacturers list, while the direct peer Risen Energy (RSM96-11-440-460BNDG, 23% efficiency) holds a BNEF Tier-1 Top 10 position by kW shipped in 2025. The absence of Tier-1 status can disqualify these modules from bank-financed projects and complicate insurance underwriting for commercial and utility-scale installations. - **Monofacial only – no bifacial gain** - The HW-M10/108H series is strictly monofacial (is\_bifacial = false), while the comparable peer Risen RSM96-11-440-460BNDG offers a bifacial design capable of capturing 5–15% additional yield from ground-reflected irradiance in ground-mount and light-surface rooftop applications. The limitation is marginal on dark-tiled pitched roofs but is a real constraint for agrivoltaic and ground-mounted systems. - **12-year product warranty vs. 15-year peers** - Hiwatt Solar provides a 12-year product warranty, while peer Risen Energy offers 15 years on comparable TOPCon modules. Risen also backs its RSM96-11 series with a 30-year linear power warranty (≥87.4% after year 30), compared to Hiwatt's 25-year term — leaving the final 5 years of typical long-term project financing without manufacturer power coverage. - **Low brand visibility in Poland** - Hiwatt Solar does not appear in any major Polish PV panel ranking (enerad.pl, sunlit.pl, eu-panele.pl, solar-project.pl), and verified installer reviews in Polish are near zero. This makes it difficult to independently assess real-world warranty service response times and local distributor support quality. ## About this series Hiwatt Solar HW-M10-108H series photovoltaic panels use advanced **Half-Cut cell** technology, which directly translates into higher installation efficiency even in difficult lighting conditions. By shortening the current flow path, these modules minimize internal losses and handle the effect of partial shading much better, which is crucial in the Polish climate zone. The innovative design based on large silicon wafers allows for optimal power density while maintaining compact module dimensions. The use of **Multi-Busbar (MBB)** technology effectively increases panel reliability, limiting the risk of micro-cracks and improving the efficiency of energy collection from the cell surface. This series stands out for its high resistance to voltage-induced degradation, ensuring a **stable energy yield** for many decades of operation. This solution is dedicated to investors building residential rooftop installations and commercial systems where the priority is to maximize power from a limited area. What distinguishes them from the competition is the precise matching of electrical parameters to the latest inverters, which significantly simplifies the design of systems with the highest efficiency. By choosing the HW-M10-108H series, you invest in **increased mechanical resistance** to extreme snow loads and strong winds, which guarantees the safety and durability of the entire structure. ## Notable figures - At 23.0% efficiency, this panel is on par with typical \*\*TOPCon 450-500W\*\* modules - Power density of 230.2 W/m² packs 5.0 W/m² more into the same footprint vs \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - At -0.34%/°C, loses 0.05pp more power per degree than \*\*TOPCon 450-500W\*\* median (-0.29%/°C) - 21.0 kg weight - 3.0 kg lighter than \*\*TOPCon 450-500W\*\* median (24.0 kg), reducing installation effort - Ranked #1797 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Hiwatt Solar HW-M10/108H series come with and what does it cover? Hiwatt Solar provides a 12-year product workmanship warranty and a 25-year linear power warranty for the HW-M10/108H series. Annual power degradation is capped at just 0.55%, which is among the lowest figures in the N-type TOPCon panel class. After 25 years of operation, the module is guaranteed to retain a substantial share of its nominal 460 Wp output, ensuring predictable energy generation throughout the system's lifetime. ### How does the TOPCon cell technology in the HW-M10/108H differ from standard PERC cells? TOPCon (Tunnel Oxide Passivated Contact) cells used in the HW-M10/108H deliver higher conversion efficiency than PERC cells through improved rear-surface passivation. The N-type silicon base virtually eliminates LID (Light Induced Degradation) and reduces losses at elevated operating temperatures. In practice, this translates to a higher annual energy yield from the same roof area — a meaningful advantage when mounting space is limited. ### Do the Hiwatt Solar HW-M10/108H panels perform well under partial shading from a chimney or antenna? The HW-M10/108H series uses half-cut cell technology (108 cells) combined with Multi-Busbar (MBB) design. Splitting cells in half reduces current path length and limits the impact of shading on one section of the module, making it noticeably more resilient than full-cell designs. For persistent, heavy shading, adding power optimizers or microinverters is still advisable to fully maximize energy harvest. ### How many HW-M10/108H modules do I need for a typical residential system of around 8 kWp? The top variant of the series reaches 460 Wp, so an 8 kWp system requires 18 panels covering approximately 30-32 m² of roof area. Under average Polish solar irradiation and an optimal tilt angle, such an array will produce roughly 7,500-8,500 kWh per year — more than enough to offset the consumption of a typical single-family home using 3,500-4,500 kWh annually. ### How fast does the HW-M10/108H degrade and what can I expect after 25 years? The manufacturer guarantees linear degradation not exceeding 0.55% per year over 25 years. TOPCon technology eliminates the steep initial power drop seen in older PERC modules (no LID effect), and the high PID (Potential Induced Degradation) resistance ensures stable output even in large systems operating at high DC voltages. Following this degradation curve, the panel retains over 86% of its initial power output at end of warranty. ### Is Hiwatt Solar a Tier 1 manufacturer and does that affect insurance or financing for my installation? Hiwatt Solar is not currently listed among Tier 1 manufacturers by Bloomberg NEF, which may matter for bank financing or insurance policies that specifically require Tier 1 panels. This does not automatically indicate lower technical quality — the HW-M10/108H series holds IEC certifications and carries a 25-year power warranty. Before purchasing, confirm acceptance with your insurer and any lender to avoid complications during project approval. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hw-m10108h-440-460-3c2f6a74199e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +1.8 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +1.7 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +1.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +1.5 pp, +5 yr warranty | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, +1.5 pp, +5 yr warranty | | [Hiwatt Solar HW-M10/108H-440](https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-440) | 440 W | -20 W, -1.0 pp | | [Hiwatt Solar HW-M10/108H-445](https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-445) | 445 W | -15 W, -0.8 pp | | [Hiwatt Solar HW-M10/108H-450](https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-450) | 450 W | -10 W, -0.5 pp | | [Hiwatt Solar HW-M10/108H-455](https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-455) | 455 W | -0.2 pp | --- Source: https://comparepv.com/panel/hiwatt-solar-hw-m10-108h-460 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.