--- title: "Hiwatt Solar HW-M360H-320 320W Solar Panel - Specs & Review | ComparePV" description: "Hiwatt Solar HW-M360H-320 320W solar panel. Specs: 19.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hiwatt-solar-hw-m360h-320" updated: 2026-09-11 --- # Hiwatt Solar HW-M360H-320 Strong in heat, no clear weak spot 286 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Hiwatt Solar - **Model:** HW-M360H-320 - **Series:** HW-M360H - **Rated power:** 320 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (286 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 325 W | Typical | | | Module efficiency | 19.30% | 19.00% | Typical | 12,799 | | Power density | 193.0 | 190.0 | Typical | 12,787 | | Temperature coefficient | -0.340 | -0.360 | Strong - top 8% | 8,778 | | Weight (kg) | 17.8 kg | 19.0 kg | Strong - top 11% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.30% | 19.00% | Typical | 12,799 | | Power density | 193.0 | 190.0 | Typical | 12,787 | | Temperature coefficient | -0.340 | -0.360 | Strong - top 8% | 8,778 | | Weight per kWp | 55.6 | 60.0 | Strong - top 11% | 9,999 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 8% of the PERC 300-350 W segment, against a median of -0.360. Ranked 8,778th in the whole database. - **55.6 kg per kWp** - Top 11% of the PERC 300-350 W segment, against a median of 60.0. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 19.30 % - **Voltage at Pmax (Vmp):** 32.96 V - **Current at Pmax (Imp):** 9.71 A - **Open-circuit voltage (Voc):** 40.44 V - **Short-circuit current (Isc):** 10.17 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:** PERC - **Cell count:** 60 ### Physical - **Length:** 1665 mm - **Width:** 996 mm - **Thickness:** 35 mm - **Weight:** 17.8 kg - **Area:** 1.66 m2 - **Power density:** 193.0 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:** 263 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12799 of 14005 | | Power density | 12787 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 9999 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Half-cut cells + 9-busbar design** - Half-cut cell technology combined with 9 busbars (9BB) reduces resistive losses by approximately 2–3% versus full cells with 5BB, lowers microfracture risk, and improves partial-shading tolerance — directly translating into higher annual energy yield. - **Up to 19.9% efficiency — beats Jinko 72 Series** - Peak module efficiency of 19.9% places the series well above the comparably positioned Jinko Solar 72 Series Polycrystalline (17%) and nearly matches the Waaree ARKA Series (19.81%), delivering more energy per m² of available roof area. - **25-year linear power warranty** - The manufacturer guarantees a minimum of 84.8% of nominal power output after 25 years of operation — the industry standard for PERC-class modules — providing predictable ROI for residential prosumer installations. - **Effective low-irradiance performance** - Half-cut architecture and 9BB busbars maintain relatively high efficiency under diffuse irradiance conditions (overcast skies, early morning), a significant advantage in the Polish climate where a large share of annual yield comes from exactly those conditions. ## Cons - **Series discontinued** - The HW-M360H series carries 'discontinued' status. Cessation of production limits the availability of identical replacement modules for system expansion or post-failure swaps, and enforcing the 12-year product warranty and 25-year power warranty may become increasingly difficult as manufacturer support diminishes. - **Manufacturer not on BNEF Tier-1 list** - Hiwatt Solar does not appear on the BNEF bankable Tier-1 list (Q1 2026). This complicates securing project financing from commercial banks, limits leasing options, and reduces the residual value of the system in any potential resale scenario. - **Legacy PERC technology — higher degradation** - PERC cells degrade at approximately 0.5–0.7% per year, compared to 0.25–0.4%/year for modern N-type TOPCon modules (e.g., JA Solar Monocrystalline80 at 23.15% efficiency). Over 25 years, the cumulative output gap can reach 2–5 percentage points in favor of TOPCon. - **Narrow power range: 310–330 Wp** - The 2025–2026 residential market standard is 400–580 Wp per module. The HW-M360H's 330 Wp maximum requires more panels and mounting points, increasing balance-of-system (BoS) costs and roof structural load compared to higher-wattage alternatives. ## About this series The Hiwatt Solar HW-M360H series consists of advanced photovoltaic modules that base their performance on **Half-Cut cell technology**. This solution significantly reduces energy losses resulting from internal resistance, which translates into higher yields even in difficult lighting conditions. Thanks to the use of **nine busbars (9BB)**, these panels offer better current flow and increased resistance to micro-cracks, which directly extends the lifespan of the entire installation. Users will appreciate them primarily for their **high efficiency in low sunlight conditions**, which is a key advantage in the Polish climate, allowing for a faster return on investment. The construction of the HW-M360H modules has been designed to minimize the impact of partial shading, ensuring that the system operates stably regardless of the time of day. It is an ideal choice for prosumers looking for a balance between modern technology and an attractive price, dedicated to both installation on the roofs of single-family houses and in larger commercial systems. Robust construction and precise workmanship guarantee **increased mechanical resistance** to extreme snow loads and strong winds, which sets this series apart from the competition as an exceptionally durable and safe solution for every Polish investor. ## Notable figures - At 19.3% efficiency, this panel is on par with typical \*\*PERC 0-400W\*\* modules - Power density of 193.0 W/m² matches the \*\*PERC 0-400W\*\* median - Temperature coefficient of -0.34%/°C matches the \*\*PERC 0-400W\*\* median - At 17.8 kg, this panel is 2.7 kg lighter than \*\*PERC 0-400W\*\* median (20.5 kg) - easier handling during installation - #12799 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### Is the Hiwatt Solar HW-M360H series still available for purchase? The HW-M360H series has been discontinued and is no longer actively manufactured. Some distributors may still carry limited warehouse stock. If you're looking for panels with a similar technology profile — PERC half-cut cells with a 9-busbar (9BB) architecture — consider newer Hiwatt Solar series or equivalent products from other manufacturers. ### What warranty does the Hiwatt Solar HW-M360H come with? The HW-M360H includes a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty guaranteeing the module retains a specified percentage of its rated wattage over time. This warranty structure is standard for PERC-class modules and provides solid long-term protection for the system owner. ### What real-world benefit do half-cut cells and 9BB busbars provide in the HW-M360H? Half-cut cell technology splits each PERC cell in two, reducing internal resistance and resistive heating losses. Nine busbars (9BB) improve current collection efficiency and significantly lower the risk of microcracks from thermal cycling or mechanical stress during shipping and installation. Combined, these features deliver measurably higher annual energy yield and a longer service life compared to older 4BB or 5BB module designs. ### How well do HW-M360H panels perform under overcast conditions typical of Poland? The HW-M360H series is optimized for strong low-light performance, which is a critical advantage in Poland's climate where overcast skies are common for much of the year. PERC cell technology combined with half-cut architecture improves spectral response and diffuse-light harvesting, resulting in a better annual capacity factor and a shorter investment payback period even in low-irradiance regions. ### Can HW-M360H panels withstand heavy snow loads and strong winds on a Polish rooftop? Yes. The HW-M360H modules are built for enhanced mechanical durability. The anodized aluminum frame and tempered front glass protect the PERC cells against extreme snow loads and high wind-pressure events common in Central European winters. This makes them a reliable choice for rooftop installations where structural loading requirements are demanding. ### How many 330 Wp HW-M360H panels do I need for a typical 6 kWp home system? To reach 6 kWp you need approximately 18 to 19 HW-M360H panels — 18 modules yield 5.94 kWp, while 19 yield 6.27 kWp. The 330 Wp power class sits in the standard residential segment and is compatible with most residential-grade MPPT inverters, making string sizing straightforward for a typical single-family home installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/HW-M360H-310-330-7d15b8ba304a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +4.0 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.0 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, +4.0 pp, +5 yr warranty | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.8 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +3.7 pp, +5 yr warranty | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +3.7 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -20 W, +3.7 pp, +5 yr warranty | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +3.7 pp, +5 yr warranty | | [Hiwatt Solar HW-P360H-275](https://comparepv.com/panel/hiwatt-solar-hw-p360h-275) | 275 W | -45 W, -2.7 pp | | [Hiwatt Solar HW-P360H-280](https://comparepv.com/panel/hiwatt-solar-hw-p360h-280) | 280 W | -40 W, -2.4 pp | | [Hiwatt Solar HW-P360H-285](https://comparepv.com/panel/hiwatt-solar-hw-p360h-285) | 285 W | -35 W, -2.1 pp | | [Hiwatt Solar HW-P360H-290](https://comparepv.com/panel/hiwatt-solar-hw-p360h-290) | 290 W | -30 W, -1.8 pp | | [Hiwatt Solar HW-P360H-295](https://comparepv.com/panel/hiwatt-solar-hw-p360h-295) | 295 W | -25 W, -1.5 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +120 W, cooler, +3.6 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +115 W, cooler, +3.4 pp | --- Source: https://comparepv.com/panel/hiwatt-solar-hw-m360h-320 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.