--- title: "Hiwatt Solar HW-M10/144H-625 625W Solar Panel - Specs & Review | ComparePV" description: "Hiwatt Solar HW-M10/144H-625 625W solar panel. Specs: 23.13% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-625" updated: 2026-09-11 --- # Hiwatt Solar HW-M10/144H-625 Middle of its segment, weak in heat 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Hiwatt Solar - **Model:** HW-M10/144H-625 - **Series:** HW-M10/144H - **Rated power:** 625 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 625 W | 625 W | Typical | | | Module efficiency | 23.13% | 22.77% | Typical | 1,563 | | Power density | 231.4 | 227.7 | Typical | 1,513 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 1% | 8,778 | | Weight (kg) | 32.8 kg | 32.5 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 4% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.13% | 22.77% | Typical | 1,563 | | Power density | 231.4 | 227.7 | Typical | 1,513 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 1% | 8,778 | | Weight per kWp | 52.5 | 52.7 | Typical | 6,039 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 4% | 9,798 | ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 1% of the N-type 600-650 W segment, against a median of -0.290. Ranked 8,778th in the whole database. - **25 year performance warranty** - Bottom 4% of the N-type 600-650 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):** 625 W - **Efficiency:** 23.13 % - **Voltage at Pmax (Vmp):** 45.04 V - **Current at Pmax (Imp):** 13.88 A - **Open-circuit voltage (Voc):** 52.87 V - **Short-circuit current (Isc):** 14.84 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:** N-type - **Cell count:** 144 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.8 kg - **Area:** 2.70 m2 - **Power density:** 231.4 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:** 513 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1563 of 14005 | | Power density | 1513 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 6039 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Peak efficiency of 23.32% matches segment leader** - The top-rated variant reaches 23.32% module efficiency — identical to the Jinko Solar Tiger Neo 66HL4M-BDV (23.32%) and clearly above Leapton LP182\*199-M-72-NH and AUSTA AU-156MH (both 22.54%). This translates to approximately 3.5% more energy from the same roof area compared to the two other direct peers. - **Half-cut 144-cell design + MBB** - The half-cut configuration (2×72 cells) combined with multi-busbar architecture reduces resistive I²R losses by an estimated 1.5–2%. Splitting the module into two independent electrical halves limits power loss under partial shading — a key advantage on rooftops with chimneys or dormers. - **N-type substrate — lower LID and degradation** - N-type cells are inherently immune to Light-Induced Degradation (LID), which causes a permanent 1–2% power loss in standard P-type PERC modules during the first weeks of operation. N-type annual degradation is typically ≤0.45%/year versus ≥0.55%/year for P-type PERC, resulting in measurably higher cumulative energy yield over a 25-year system life. - **M10 (182 mm) format — optimal for large systems** - The 182×182 mm (M10) cell format is the current industry standard in the high-power segment, ensuring good compatibility with inverters in the 530–700 V MPPT range. With 10 power classes spanning 530–630 Wp, the series gives installers flexibility for both residential prosumer and commercial C&I string design. ## Cons - **Series discontinued** - The HW-M10/144H series carries a discontinued status, eliminating the possibility of ordering additional modules for system expansion and increasing the risk of unavailable replacement units in case of mechanical failure. For multi-megawatt installations with PPA agreements extending beyond 2030, this represents a material operational risk. - **Manufacturer not on BNEF Tier-1 list** - Hiwatt Solar does not appear on the BNEF bankable Tier-1 list (Q1 2026), unlike peer Jinko Solar. This effectively excludes or significantly complicates non-recourse project finance and may increase insurance premiums by 10–20 bps compared to modules from recognized bankable manufacturers. - **PERC architecture instead of TOPCon** - Despite using an N-type substrate, the series employs PERC architecture rather than TOPCon (used by the competing Jinko Tiger Neo). TOPCon delivers superior surface passivation, lower degradation (~0.40%/year vs ~0.45%/year for N-PERC), and higher bifacial potential — the absence of this architecture limits the long-term performance advantage over premium P-type modules. - **Only 12-year product warranty** - The product warranty covers 12 years, while LONGi Hi-MO X6, Trina Vertex S+, and Q CELLS Q.PEAK DUO now offer a standard 15-year product warranty in 2025/2026. In commercial installations financed with 15+ year loans, the shorter product warranty may be treated by lenders as a risk factor affecting DSCR calculations. ## About this series The Hiwatt Solar HW-M10/144H series is based on advanced M10-type cells with a 182 mm side, which translates to optimal use of available roof space while maintaining the highest energy efficiency. The use of **multi-busbar (MBB)** technology allows for a significant shortening of the current flow path, which effectively reduces resistance losses and minimizes the risk of micro-cracks in the silicon structure. Thanks to a refined design based on **half-cut cells**, these panels show significantly higher resistance to partial shading effects, which is a key advantage in variable weather conditions typical for Poland. These modules are an ideal solution for large commercial installations and modern prosumer systems, where the priority is maximizing yields per square meter. They solve the common problem of performance drops during heatwaves thanks to **low temperature coefficients**, which puts them a step ahead of standard market solutions. The reinforced frame construction guarantees **increased resistance to mechanical loads**, such as accumulated snow or strong wind, ensuring investment security for decades. Choosing this series is a guarantee of stable operation and protection against PID-type degradation, making these modules one of the most cost-effective propositions in the professional photovoltaics segment. ## Notable figures - Efficiency of 23.1% matches the \*\*N-type 600-650W\*\* median - At 231.4 W/m² power density, this panel generates 3.7 W/m² more per unit area than \*\*N-type 600-650W\*\* median (227.7 W/m²) - At -0.34%/°C, loses 0.05pp more power per degree than \*\*N-type 600-650W\*\* median (-0.29%/°C) - In the top 11% for efficiency among all N-type panels ## Questions ### Is the Hiwatt Solar HW-M10/144H series still available for purchase? The HW-M10/144H series has been discontinued and is no longer part of Hiwatt Solar's active product lineup. Some units may still appear as dealer stock at distributors, but official production has ended. If you need PERC 144-cell modules with similar output characteristics, it's worth exploring current offerings from other manufacturers in the same power class before committing to a purchase. ### What warranty does the Hiwatt Solar HW-M10/144H come with? Hiwatt Solar provides a 12-year product warranty and a 25-year linear power output warranty for the HW-M10/144H series. The power warranty guarantees that module output will stay above defined thresholds for a quarter of a century. However, since the series is discontinued, it's advisable to confirm warranty claim procedures directly with your distributor before purchasing any remaining stock units. ### Do the half-cut PERC cells in the HW-M10/144H help with partial roof shading? Yes, the half-cut cell design used in the HW-M10/144H significantly reduces losses caused by partial shading from chimneys, antennas, or neighboring buildings. Splitting each PERC cell in half lowers the operating current and resistive losses within the module. As a result, even when part of the panel is shaded, the remaining cells continue to operate near their rated efficiency — a meaningful advantage under variable Central European weather conditions. ### Is 630 Wp too much for a residential system, or can the HW-M10/144H work on a house rooftop? At 630 Wp peak, the HW-M10/144H sits in the high-power segment and is primarily designed for large commercial installations and utility-scale solar farms. For a typical 10 kWp residential system you'd need only 16 panels, which simplifies the layout and reduces BoS costs. The large M10 cell format (182 mm) does require a properly rated racking system and an experienced installation crew to handle the module size safely. ### How does multi-busbar (MBB) technology in the HW-M10/144H actually improve performance? Multi-busbar (MBB) technology replaces the traditional 3–5 wide busbars with a larger number of thin round wires across each PERC cell. In the HW-M10/144H this shortens the current path inside each cell, measurably reducing resistive losses and boosting overall module efficiency. A secondary benefit is lower mechanical stress on the silicon, which helps prevent microcracks from forming and contributes to more stable long-term output over the module's lifespan. ### Are the Hiwatt Solar HW-M10/144H panels bifacial, and can they be used in a ground-mount system? No, the HW-M10/144H is a monofacial module — it generates power from the front side only and does not belong to the bifacial category. In a ground-mount configuration this means no additional yield from ground-reflected irradiance. Ground mounting is technically feasible, but to fully exploit the advantages of that installation type — especially albedo gain — a dedicated bifacial module would be a better choice. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hw-m10144h-610-630-40341086753d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +50 W, cooler, +1.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, +1.7 pp, +5 yr warranty | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, +1.7 pp, +5 yr warranty | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.7 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | Cooler, +1.7 pp, +5 yr warranty | | [Hiwatt Solar HW-M10/144H-610](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-610) | 610 W | -15 W, -0.6 pp | | [Hiwatt Solar HW-M10/144H-615](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-615) | 615 W | -10 W, -0.4 pp | | [Hiwatt Solar HW-M10/144H-620](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-620) | 620 W | Very close match | | [Hiwatt Solar HW-M10/144H-630](https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-630) | 630 W | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +55 W, cooler, +2.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +75 W, cooler, +1.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +70 W, cooler, +1.8 pp | --- Source: https://comparepv.com/panel/hiwatt-solar-hw-m10-144h-625 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.