--- title: "Panasonic EVPV370K 370W Solar Panel - Specs & Review | ComparePV" description: "Panasonic EVPV370K 370W solar panel. Specs: 21.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/panasonic-evpv370k" updated: 2026-09-11 --- # Panasonic EVPV370K Middle of its segment, weak in heat 45 panels in the segment HJT 350-400 W ## Identity - **Manufacturer:** Panasonic - **Model:** EVPV370K - **Series:** EVERVOLT Solar Module Black Series 370K/360K - **Rated power:** 370 W - **Cell technology:** HJT ## How it compares Compared against segment HJT 350-400 W (45 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 380 W | Weak - bottom 24% | | | Module efficiency | 21.20% | 20.90% | Typical | 9,076 | | Power density | 211.6 | 209.3 | Typical | 9,189 | | Temperature coefficient | -0.260 | -0.259 | Weak - bottom 9% | 511 | | Weight (kg) | 19.5 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 | 21.20% | 20.90% | Typical | 9,076 | | Power density | 211.6 | 209.3 | Typical | 9,189 | | Temperature coefficient | -0.260 | -0.259 | Weak - bottom 9% | 511 | | Weight per kWp | 52.7 | 59.2 | Typical | 6,344 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **-0.260 %/°C temperature coefficient** - Bottom 9% of the HJT 350-400 W segment, against a median of -0.259. Ranked 511th in the whole database. - **25 year performance warranty** - Bottom 19% of the HJT 350-400 W segment, against a median of 30 yrs. - **Best for:** Residential, shaded-installations and hot-climate. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 21.20 % - **Voltage at Pmax (Vmp):** 37.40 V - **Current at Pmax (Imp):** 9.90 A - **Open-circuit voltage (Voc):** 44.10 V - **Short-circuit current (Isc):** 10.55 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT ### Physical - **Length:** 1721 mm - **Width:** 1016 mm - **Thickness:** 30 mm - **Weight:** 19.5 kg - **Area:** 1.75 m2 - **Power density:** 211.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 92.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.25 % - **Output after 30 years:** 336 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9076 of 14005 | | Power density | 9189 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 6344 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Highest efficiency in the segment** - At 21.2% efficiency, this module clearly outperforms comparable 370 Wp panels — Solitek SOLID Bifacial (19.57%), Solarwatt Panel vision GM 3.0 (19.9%), and Selfa SV120M.3.2 (20.3%). This means higher energy yield from the same roof area. - **HJT technology with a low temperature coefficient** - The combination of half-cut cells and heterojunction (HJT) technology delivers a power temperature coefficient of 0.26%/°C, one of the best on the market. In practice this means lower production losses on hot days compared to conventional PERC cells (typically 0.35–0.40%/°C). - **Very low power degradation** - The module loses only 2% of power in the first year, followed by just 0.25% annual degradation, guaranteeing a minimum of 92% of nominal power after 25 years of operation. This ensures more predictable energy yields over the long-term investment horizon. - **Comprehensive 25-year warranty** - The AllGuard/TripleGuard program covers product, power performance, and parts and labor simultaneously for 25 years — a much broader coverage scope than the standard 10-12 year product warranty offered by many tier-2 manufacturers. - **Aesthetic all-black design for complex roofs** - The uniform black finish (Black Series), combined with high power output on a compact footprint, works well on complex, sloped roof geometries typical of Polish residential installations. ## Cons - **Production discontinued in 2025** - Panasonic announced on April 28, 2025, a complete exit from the PV module and energy storage market, ending the EVERVOLT line. While the company stated it would continue warranty support for existing installations, long-term availability of replacement parts and after-sales service is more limited compared to manufacturers still actively operating in the market. ## About this series The Panasonic EVERVOLT Solar Module Black Series 370K/360K is designed to maximize energy generation from a limited roof area, without compromising the aesthetics of the installation. A key advantage is the combination of **half-cut cells** with **heterojunction technology (HJT)**, which results in more stable module performance in challenging conditions and lower losses over time. In practice, this translates to a real benefit for the investor: improved performance on hot days thanks to **excellent high-temperature performance**, and greater predictability of energy production year after year due to **low power degradation over time**. This solution is particularly well-suited for residential installations in Poland - both on roofs with complex geometries and where the elegant appearance of the modules is important. In addition, the series offers **a 25-year warranty**, which makes it easier to plan costs and reduces the risk of service issues over the long term. ## Notable figures - 21.2% module efficiency - 0.6pp better than the \*\*HJT 0-400W\*\* median of 20.6% - Power density of 211.6 W/m² packs 5.2 W/m² more into the same footprint vs \*\*HJT 0-400W\*\* median (206.4 W/m²) - At -0.26%/°C, hot weather performance is typical for \*\*HJT 0-400W\*\* panels - Weight of 19.5 kg (2.0 kg below \*\*HJT 0-400W\*\* median of 21.5 kg) allows easier transport and roof mounting - Ranked #9076 out of 14005 panels for efficiency in the database ## Questions ### Is the Panasonic EVERVOLT Black Series 370K/360K still available for purchase? No, the EVERVOLT Black Series 370K/360K has been discontinued. Panasonic exited the solar panel market and no longer manufactures these modules. Limited stock may still be found with select distributors, but availability is not guaranteed. Panasonic continues to honor previously issued warranties, though future service or replacement may be more difficult to arrange as the product line is no longer supported commercially. ### What is HJT technology in the Panasonic EVERVOLT 370K and why is it better than PERC? HJT (heterojunction technology) combines crystalline silicon with thin amorphous silicon layers, significantly reducing recombination losses at the cell surface. The result is module efficiency exceeding 21% for the 370K model, superior performance in heat, and an annual degradation rate of approximately 0.25%, compared to 0.45–0.55% typical of PERC cells. Over a 25-year system lifetime, this translates to meaningfully more total energy yield per installed watt. ### How much power do the EVERVOLT Black Series 370K panels lose at high temperatures in summer? The 370K series has a temperature coefficient of just -0.26%/°C, among the best in the industry. When module temperature reaches 70°C under real summer conditions, the 370K loses roughly 13% of its rated output, while a standard PERC panel would lose 18–20%. This low temperature coefficient directly boosts energy production on hot, sunny days and improves the overall LCOE of the installation. ### What warranty does the Panasonic EVERVOLT 370K/360K come with and what does it cover? The EVERVOLT Black Series 370K/360K carries both a 25-year product warranty covering manufacturing defects and a 25-year power output warranty guaranteeing at least 92% of rated power after 25 years of operation. Because Panasonic has exited the solar market, buyers should confirm warranty claim procedures with their regional distributor or Panasonic's designated service partner before purchasing remaining stock. ### Are the Panasonic EVERVOLT Black Series 370K panels suitable for pitched roofs with partial shading? Yes. The 370K/360K series uses half-cut cell technology, which splits each cell into two independent sections and reduces mismatch losses caused by partial shading from chimneys, dormers, or neighboring objects. The all-black Black Series frame and backsheet also make these modules an attractive choice for residential pitched roofs. For severe or persistent shading, pairing the panels with power optimizers or microinverters is still recommended. ### How slowly do the Panasonic EVERVOLT 370K modules degrade over time, and what does the manufacturer guarantee? The 370K series carries an annual degradation rate of approximately 0.25%, one of the lowest available in the residential PV market. After 25 years, the panels retain roughly 93–94% of rated power, with Panasonic guaranteeing a minimum of 92%. Standard PERC modules typically degrade at 0.45–0.55% per year. Lower degradation directly reduces lifetime LCOE and improves the predictability of annual energy yield for system owners and financiers. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/370k-datasheet-db7738169ce4.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | -40 W, lighter, +1.9 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | -40 W, lighter, +1.9 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +1.8 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 | Lighter, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, +1.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +1.8 pp, +5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | +30 W, +1.4 pp, +15 yr warranty | | [Panasonic EVPV350K](https://comparepv.com/panel/panasonic-evpv350k) | 350 W | -20 W, -1.2 pp | | [Panasonic EVPV360](https://comparepv.com/panel/panasonic-evpv360) | 360 W | -10 W, -0.6 pp | | [Panasonic EVPV380](https://comparepv.com/panel/panasonic-evpv380) | 380 W | +10 W, +0.5 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +70 W, +1.7 pp, +5 yr warranty | | [Mysolar USA MS440N-DHBA](https://comparepv.com/panel/mysolar-usa-ms440n-dhba) | 440 W | +70 W, +1.5 pp, +5 yr warranty | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +65 W, +1.5 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/panasonic-evpv370k 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.