--- title: "Panasonic VBHN335SJ53 335W Solar Panel - Specs & Review | ComparePV" description: "Panasonic VBHN335SJ53 335W solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/panasonic-vbhn335sj53" updated: 2026-09-11 --- # Panasonic VBHN335SJ53 Middle of its segment, short guarantee 113 panels in the segment HJT 235-435 W ## Identity - **Manufacturer:** Panasonic - **Model:** VBHN335SJ53 - **Series:** Photovoltaic modules HIT®+ (N340) HIT® (N335/N330/N325) - **Rated power:** 335 W - **Cell technology:** HJT ## How it compares Compared against segment HJT 235-435 W (113 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 335 W | 390 W | Weak - bottom 12% | | | Module efficiency | 20.00% | 20.90% | Weak - bottom 23% | 12,214 | | Power density | 200.1 | 209.3 | Weak - bottom 22% | 12,209 | | Temperature coefficient | -0.258 | -0.240 | Typical | 466 | | Weight (kg) | 19.0 kg | 22.8 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.00% | 20.90% | Weak - bottom 23% | 12,214 | | Power density | 200.1 | 209.3 | Weak - bottom 22% | 12,209 | | Temperature coefficient | -0.258 | -0.240 | Typical | 466 | | Weight per kWp | 56.7 | 57.0 | Typical | 10,811 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the HJT 235-435 W segment, against a median of 30 yrs. - **200.1 watts per square metre** - Bottom 22% of the HJT 235-435 W segment, against a median of 209.3. - **20.00% module efficiency** - Bottom 23% of the HJT 235-435 W segment, against a median of 20.90%. - **Best for:** Residential and hot-climate. - **Not ideal for:** Owners who want a long output guarantee, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 335 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 59.40 V - **Current at Pmax (Imp):** 5.65 A - **Open-circuit voltage (Voc):** 71.00 V - **Short-circuit current (Isc):** 6.08 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.258 %/degC - **Temperature coefficient of Voc:** -0.235 %/degC - **Temperature coefficient of Isc:** 0.055 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT ### Physical - **Length:** 1590 mm - **Width:** 1053 mm - **Thickness:** 40 mm - **Weight:** 19.0 kg - **Area:** 1.67 m2 - **Power density:** 200.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 86.2 % - **First-year degradation:** 3.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 281 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12214 of 14005 | | Power density | 12209 of 14005 | | Temperature coefficient | 466 of 14005 | | Weight | 10811 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Industry-leading temperature coefficient** - The power temperature coefficient of -0.258%/°C (N340 variant) is among the lowest in the market versus typical -0.35% to -0.40%/°C for PERC modules. This translates into real higher energy yield on hot summer days once module temperature exceeds 25°C. - **Top efficiency among comparable modules** - Efficiency up to 20.4% exceeds direct peers at the same 340 Wp maximum power class: Bruk-Bet NIVO EXTREME (20.32%), Resun RS6K-M (20.15%), and MWG Mono (20.12%). - **HJT technology minimizes losses and LID** - The heterojunction design, combining mono-crystalline wafers with ultra-thin amorphous silicon layers, limits cell-boundary losses and light-induced degradation (LID), delivering a more stable yield in the early years of operation. - **Corner water-drainage frame design** - The frame design prevents water and debris buildup in the corners, reducing soiling and maintaining high output even at low tilt angles. - **Well-established quality reputation** - Panasonic (Japan, founded 1918) was long regarded as a quality leader in the HJT module segment, which translated into a low failure rate for the HIT® series in residential PV installations. ## Cons - **Production discontinued in 2022** - Panasonic exited in-house PV module manufacturing in March 2022, replacing the HIT® line with EverVolt panels made by third-party OEMs. This means limited spare-part availability and more difficult warranty service for existing installations. - **Low unit power by 2026 standards** - The 325-340 Wp power range is significantly below current market standards (400-600+ Wp), requiring more modules, mounting structure, and cabling for the same system power, increasing BoS costs. - **25/25-year warranty trails current N-type Tier-1 leaders** - Current N-type (e.g., TOPCon) leaders already offer 30-year product and power warranties guaranteeing over 87.4% output at end of term, while the HIT® series remains at the 25/25-year standard set back in 2016. ## About this series The Panasonic HIT® module series, encompassing models from N325 to N340, redefines efficiency standards through the use of advanced **heterojunction technology (HJT)**. The unique design, combining monocrystalline silicon wafers with ultra-thin amorphous layers, allows for the effective minimization of energy losses at cell boundaries. This solution directly translates into an **exceptionally low temperature coefficient**, ensuring that the panels maintain high efficiency even on hot summer days when traditional silicon modules lose power drastically. These models stand out with their compact format while maintaining high power density, which is crucial for homeowners with limited roof space. The integrated water drainage system in the frame corners prevents the accumulation of dirt and deposits, guaranteeing **maximum energy yields** throughout the year, even at a low tilt angle. By choosing the HIT® series, investors receive a product of legendary reliability that almost completely eliminates the problem of light-induced degradation (LID). This is an ideal solution for those seeking **reliability and the highest aesthetics**, offering a significantly higher yield per square meter than standard competing products. These panels are an optimal choice for demanding prosumer installations where the priority is the highest quality of workmanship and long-term profitability of investment in renewable energy sources. ## Notable figures - Efficiency of 20.0% is 0.6pp below the \*\*HJT 0-400W\*\* median (20.6%) - Power density of 200.1 W/m² is 6.3 W/m² below \*\*HJT 0-400W\*\* median (206.4 W/m²) - needs more roof space - At -0.26%/°C, hot weather performance is typical for \*\*HJT 0-400W\*\* panels - 19.0 kg weight - 2.5 kg lighter than \*\*HJT 0-400W\*\* median (21.5 kg), reducing installation effort - In the top 87% for efficiency among all HJT panels ## Questions ### Are Panasonic HIT N325–N340 modules still available for purchase? The Panasonic HIT series (N325, N330, N335, N340) has been officially discontinued. Panasonic ended in-house HJT module manufacturing in March 2022 and fully exited the solar and energy storage business in April 2025. Remaining inventory may still be found through distributors, but sourcing new units with a valid manufacturer warranty is practically impossible. Buyers should consider newer HJT modules from alternative manufacturers as a replacement. ### What is the temperature coefficient of the Panasonic HIT N340 and why does it matter? The N340 features an industry-leading temperature coefficient of just -0.258%/°C (Pmax). In practice, when a module heats up to 70°C on a hot summer day — common in Central Europe — power loss is only around 7–8%, compared to 12–15% for standard mono PERC modules. A system built with HIT N340 panels will therefore produce measurably more energy than a same-nameplate-wattage system using conventional modules during peak summer hours. ### What warranties covered the Panasonic HIT N335 and do they still apply? Panasonic offered a 25-year product warranty and a 25-year linear power warranty for the entire HIT series. The power guarantee specified at least 90.76% of rated output after 10 years and 80.7% after 25 years. However, since Panasonic has fully exited the solar business, warranty claims may be difficult to enforce. Anyone considering second-hand HIT panels should carefully investigate whether any warranty coverage remains valid before purchasing. ### How does the HJT technology in Panasonic HIT panels compare to mainstream PERC modules? In HJT modules like the Panasonic HIT series, mono-crystalline silicon wafers are sandwiched between ultra-thin amorphous silicon layers. This eliminates surface recombination losses and nearly eliminates Light-Induced Degradation (LID). PERC technology improves rear-surface light reflection but does not address thermal losses as effectively. HJT delivers a lower temperature coefficient and higher efficiency per square meter, though at a higher manufacturing cost than PERC. ### Are Panasonic HIT N330 modules a good fit for a small roof with limited area? Yes, the HIT series was engineered for high power density. The N330 achieves 19.7% module efficiency and the N340 reaches 20.4%, delivering more watts per square meter than typical mono PERC modules at 18–19%. On a 15–20 m² roof, that efficiency advantage can translate to one additional panel's worth of output, potentially adding several hundred kWh of annual generation without expanding the array footprint. ### Are the Panasonic HIT N325–N340 panels bifacial, and can they harvest reflected light? No, the entire Panasonic HIT N325–N340 lineup consists of monofacial modules — they are not bifacial. Energy is generated solely from the front side, with no additional gain from albedo radiation reflected off the ground. The HJT cell technology in these panels focuses on minimizing thermal losses and LID rather than enabling bifacial generation. If the installation site features high-albedo surfaces such as white gravel or frequent snow cover, a modern bifacial HJT module from another manufacturer would be a better fit. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Panasonic_HIT_N3xxxSJ53_datasheet_EN-b109fc87a24f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | -35 W, lighter, +3.3 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | -35 W, lighter, +3.3 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Hotter, lighter, +3.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Hotter, lighter, +3.1 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -50 W, lighter, +3.0 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -35 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +45 W, +3.0 pp, +5 yr warranty | | [Panasonic VBHN325SJ53](https://comparepv.com/panel/panasonic-vbhn325sj53) | 325 W | -10 W, -0.6 pp | | [Panasonic VBHN330SJ53](https://comparepv.com/panel/panasonic-vbhn330sj53) | 330 W | -0.3 pp | | [Panasonic VBHN340SJ53](https://comparepv.com/panel/panasonic-vbhn340sj53) | 340 W | +0.4 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | +65 W, +2.6 pp, +15 yr warranty | | [Phono Solar NS-360MH-60](https://comparepv.com/panel/phono-solar-ns-360mh-60) | 360 W | +25 W, hotter, +2.1 pp | | [PolyCrown Solar Tech NS-360MH-60](https://comparepv.com/panel/polycrown-solar-tech-ns-360mh-60) | 360 W | +25 W, hotter, +2.1 pp | --- Source: https://comparepv.com/panel/panasonic-vbhn335sj53 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.