--- title: "Hiwatt Solar HW-M10/144G-585 585W Solar Panel - Specs & Review | ComparePV" description: "Hiwatt Solar HW-M10/144G-585 585W solar panel. Specs: 22.65% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-585" updated: 2026-09-11 --- # Hiwatt Solar HW-M10/144G-585 Middle of its segment, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Hiwatt Solar - **Model:** HW-M10/144G-585 - **Series:** HW-M10/144G - **Rated power:** 585 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 585 W | 580 W | Typical | | | Module efficiency | 22.65% | 22.44% | Typical | 3,522 | | Power density | 226.5 | 224.4 | Typical | 3,500 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,778 | | Weight (kg) | 32.0 kg | 31.2 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.65% | 22.44% | Typical | 3,522 | | Power density | 226.5 | 224.4 | Typical | 3,500 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,778 | | Weight per kWp | 54.7 | 53.8 | Typical | 9,081 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 8,778th in the whole database. - **25 year performance warranty** - Bottom 5% of the TOPCon 550-600 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 585 W - **Efficiency:** 22.65 % - **Voltage at Pmax (Vmp):** 44.02 V - **Current at Pmax (Imp):** 13.29 A - **Open-circuit voltage (Voc):** 52.70 V - **Short-circuit current (Isc):** 14.01 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:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 226.5 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:** 480 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3522 of 14005 | | Power density | 3500 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 9081 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Top-tier efficiency in segment** - Modules reach up to 23.23% efficiency, placing the series on par with the best peer comparables (Tongwei 23.2%, Lexron 23.23%) and well above Talesun BISTAR (21.5%). The ~1.7 pp gap vs. Talesun translates into meaningfully higher energy yield per square meter of roof or land area. - **N-type TOPCon – low LID and better Tco** - N-type TOPCon cells exhibit near-zero LID (Light-Induced Degradation) compared to PERC technology. The measured temperature coefficient of -0.34%/°C outperforms typical PERC (-0.35 to -0.45%/°C), resulting in higher yield on hot days — particularly relevant for utility-scale installations operating year-round. - **Bifacial construction** - The symmetrical bifacial structure allows the module to absorb reflected irradiance on the rear side. In ground-mount PV farm conditions with light-colored gravel or snow cover, the bifacial gain can increase annual yield by 5–15% at no additional BoS cost. - **Half-cut + Multi-Busbar – shade tolerance** - Splitting cells in half reduces internal resistance and limits mismatch losses under partial shading (bypass diodes protect half a string instead of the full string). MBB technology reduces microcrak propagation risk and shortens current paths, directly improving long-term module durability over a multi-decade operational cycle. - **High PID resistance** - The series carries confirmed PID (Potential Induced Degradation) resistance, which is critical for large commercial and utility-scale PV systems operating at high DC system voltages (up to 1500 V DC). This limits the risk of power loss caused by uncontrolled charge leakage through the module frame. ## Cons - **Not BNEF Tier-1 bankable** - Hiwatt Solar does not appear on BloombergNEF's bankable manufacturers list (Q1 2026). For large PV farm projects financed by independent commercial banks, the absence of Tier-1 status may require a higher DSCR covenant or manufacturer credit insurance, effectively raising the project's LCOE. Peer comparable Tongwei holds Tier-1 status. - **12-year product warranty** - The manufacturer offers a 12-year workmanship warranty, while leading Tier-1 suppliers (JA Solar, Jinko Solar, LONGi) standardly provide 15 years. The 3-year gap may be material in long-term project finance structures or when calculating O&M risk costs. ## About this series The Hiwatt Solar HW-M10/144G solar panel series is based on advanced M10-type monocrystalline cells, which optimize energy density per square meter. Thanks to the use of **Half-Cut technology**, these modules effectively minimize energy losses resulting from temporary shading and reduce internal resistance, which directly translates into higher efficiency of the entire system. This solution is an effective response to the needs of investors seeking maximum yield with limited installation space. The use of **Multi-Busbar cells** ensures more efficient current flow and significantly increased resistance to micro-cracks, which clearly distinguishes this series from older market solutions. Hiwatt Solar HW-M10/144G panels were designed primarily for large commercial installations and solar farms, where durability and low cost of energy generation are key. Their **high resistance to PID degradation** and solid, reinforced mechanical construction ensure that the modules operate stably even in the demanding Polish climate. By choosing this series, the investor gains a product that combines innovation with industrial durability, which guarantees capital security for decades. This is **energy yield optimization** dedicated to professionals who value reliability and a modern approach to large-scale photovoltaics. ## Notable figures - At 22.6% efficiency, this panel is on par with typical \*\*TOPCon 550-600W\*\* modules - At 226.5 W/m² power density, roof space requirements are typical for \*\*TOPCon 550-600W\*\* panels - At -0.34%/°C, loses 0.05pp more power per degree than \*\*TOPCon 550-600W\*\* median (-0.29%/°C) - In the top 25% for efficiency among all TOPCon panels ## Questions ### How does TOPCon cell technology in the Hiwatt Solar HW-M10/144G differ from older PERC cells? TOPCon (Tunnel Oxide Passivated Contact) cells represent the latest generation of N-type monocrystalline technology. Compared to conventional P-type PERC cells, they achieve higher efficiency — the HW-M10/144G series reaches up to 23.23% — and feature a lower temperature coefficient of −0.34%/°C, translating to better output on hot days. TOPCon cells are also significantly less susceptible to LID and PID degradation, ensuring long-term power stability throughout the 25-year linear power warranty. ### What warranty does the Hiwatt Solar HW-M10/144G come with? The manufacturer provides a 12-year product warranty covering material and manufacturing defects, along with a 25-year linear power warranty guaranteeing at least 84.8% of rated power output at end of life. This is on par with commercial-grade modules. The warranty is valid under normal operating conditions and requires proper storage and installation per the manufacturer's guidelines. ### Are the Hiwatt Solar HW-M10/144G panels bifacial, and how does that affect energy yield? Yes, the HW-M10/144G is a bifacial module — it is optically active on both sides. The rear surface of the TOPCon cell captures reflected irradiance (albedo) from the ground, which can boost energy yield by 5–15% compared to a monofacial module of equivalent rating, depending on ground reflectivity (white geomembrane, gravel, snow). Bifacial gain is highest in ground-mounted utility-scale plants with adequate mounting height for uniform rear-side illumination. ### What type of installation is the HW-M10/144G series best suited for — can it be used on a residential rooftop? The HW-M10/144G series was designed primarily for utility-scale ground-mounted farms and large commercial rooftop installations on warehouses or industrial buildings. Its dimensions of 2278×1134 mm and weight of 32 kg require mechanical lifting equipment and a robust mounting structure, making it unsuitable for a typical residential rooftop. High unit power up to 600 Wp and a low cost-per-watt effectively reduce the overall LCOE of large-scale plants. ### How do the Hiwatt Solar HW-M10/144G panels handle partial shading and cold winter temperatures? The half-cut cell design (144 cells split in half) divides the module into two electrically independent halves, so shading one section only affects that half — total losses are significantly reduced compared to full-cell modules. The Pmax temperature coefficient of −0.34%/°C means that on a cold sunny day (−10°C) the panel generates approximately 6.6% more power than under STC conditions (25°C), so winter peak production can actually exceed summer output. ### Is Hiwatt Solar a Tier 1 manufacturer, and what should buyers watch out for when purchasing these panels? Hiwatt Solar is currently not listed among Bloomberg NEF Tier 1 manufacturers, meaning it is a smaller-scale producer. Securing bank financing for projects using its modules may be more challenging. Before purchasing, verify that the local distributor provides in-country warranty support and confirm that the modules carry current IEC certifications. Technically, the panels meet the standards required for grid-connected installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/mono-bifacial-580-600-441ba08fddd6.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | Cooler, +1.8 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 16 kg lighter, +1.8 pp | | [Hiwatt Solar HW-M10/144H-530](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-530) | 530 W | -55 W, lighter, -2.1 pp | | [Hiwatt Solar HW-M10/144H-535](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-535) | 535 W | -50 W, lighter, -1.9 pp | | [Hiwatt Solar HW-M10/144H-540](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-540) | 540 W | -45 W, lighter, -1.8 pp | | [Hiwatt Solar HW-M10/144H-545](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-545) | 545 W | -40 W, lighter, -1.5 pp | | [Hiwatt Solar HW-M10/144H-550](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-550) | 550 W | -35 W, lighter, -1.3 pp | | [Hiwatt Solar HW-M10/144G-560](https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-560) | 560 W | -25 W, -1.0 pp | | [Hiwatt Solar HW-M10/144G-565](https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-565) | 565 W | -20 W, -0.8 pp | | [Hiwatt Solar HW-M10/144G-570](https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-570) | 570 W | -15 W, -0.6 pp | | [Hiwatt Solar HW-M10/144G-575](https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-575) | 575 W | -10 W, -0.4 pp | | [Hiwatt Solar HW-M10/144G-580](https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-580) | 580 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +65 W, cooler, +2.6 pp | --- Source: https://comparepv.com/panel/hiwatt-solar-hw-m10-144g-585 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.