--- title: "Panasonic EVPV390H 390W Solar Panel - Specs & Review | ComparePV" description: "Panasonic EVPV390H 390W solar panel. Specs: 21.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/panasonic-evpv390h" updated: 2026-09-11 --- # Panasonic EVPV390H Light for its output, weak in heat 45 panels in the segment HJT 350-400 W ## Identity - **Manufacturer:** Panasonic - **Model:** EVPV390H - **Series:** EVERVOLT Solar Module Series (390H) - **Rated power:** 390 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) | 390 W | 380 W | Strong - top 19% | | | Module efficiency | 21.10% | 20.90% | Typical | 9,297 | | Power density | 210.8 | 209.3 | Typical | 9,551 | | Temperature coefficient | -0.260 | -0.259 | Weak - bottom 9% | 511 | | Weight (kg) | 20.5 kg | 22.8 kg | Strong - top 24% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.10% | 20.90% | Typical | 9,297 | | Power density | 210.8 | 209.3 | Typical | 9,551 | | Temperature coefficient | -0.260 | -0.259 | Weak - bottom 9% | 511 | | Weight per kWp | 52.6 | 59.2 | Strong - top 24% | 6,190 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Strengths - **52.6 kg per kWp** - Top 24% of the HJT 350-400 W segment, against a median of 59.2. ### 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, commercial, shaded-installations and hot-climate. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 21.10 % - **Voltage at Pmax (Vmp):** 41.50 V - **Current at Pmax (Imp):** 9.40 A - **Open-circuit voltage (Voc):** 48.60 V - **Short-circuit current (Isc):** 10.19 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:** 1821 mm - **Width:** 1016 mm - **Thickness:** 30 mm - **Weight:** 20.5 kg - **Area:** 1.85 m2 - **Power density:** 210.8 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:** 354 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9297 of 14005 | | Power density | 9551 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 6190 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Low 0.26%/°C temperature coefficient** - N-type HJT technology delivers a power temperature coefficient of 0.26%/°C, notably better than the typical 0.35-0.40%/°C seen in conventional PERC modules. This translates into higher real-world yield during summer and on poorly ventilated roof arrays. - **Very low annual degradation (0.25%/year)** - The manufacturer guarantees at least 92% of rated power after 25 years, corresponding to an annual degradation rate of roughly 0.25% - well below the 0.45-0.55%/year typical of PERC modules. This provides a more predictable energy yield over the investment's lifetime. - **Competitive 21.1% efficiency** - At 21.1% efficiency, the series is on par with Meyer Burger Glass (21.2%) and ahead of JA Solar JAM60S21 (21.0%), meaning a smaller module footprint per kWp at the same 390 Wp rating. - **Consistent 25-year product and power warranty** - Panasonic backs the module with a 25-year warranty covering both the product and power output - unlike many Tier-1 manufacturers that offer a shorter product warranty (10-12 years) alongside a 25-year power guarantee. This simplifies claims in the event of a defect. - **LID and PID resistance from n-type cells** - N-type cells eliminate the Light Induced Degradation typical of PERC panels and limit Potential Induced Degradation, resulting in more stable output in the first years of operation and under partial shading. ## Cons - **Production discontinued - Panasonic exited solar** - The EVERVOLT series (including the 390H variant) has been discontinued, and Panasonic announced in 2025 a full exit from the global solar and energy storage business. Despite pledges to honor existing warranties, long-term availability of spare parts and service support remains uncertain. - **Efficiency trails the top peer comparable** - At 21.1% efficiency, the series falls slightly behind Phono Solar Twinplus M4-9B-R (21.3%) - a small 0.2 pp gap, but in the premium HJT/mono segment every tenth of a percent per square meter of roof matters. - **No bifacial variant available** - The module is not offered in a bifacial configuration, which with suitable mounting (e.g., on high-albedo racking) can add 5-15% extra yield - some competing HJT series on the market already offer double-sided variants. ## About this series The Panasonic EVERVOLT Solar Module (390H) series is designed for maximum energy yield in situations where every square meter of roof space matters. A key advantage is the **HJT heterojunction cell technology** in a half-cut configuration, which minimizes losses and stabilizes module performance in real-world conditions, not just in a laboratory. This translates to **improved performance at high temperatures**, which is particularly important in summer and on roofs with poor ventilation, where standard panels often lose efficiency. Another distinguishing feature of the series is **high resistance to LID and PID degradation** thanks to the use of n-type cells, which is important for investors who expect predictable performance from their solar installations over many years. The modules have been optimized for **performance under partial shading**, which is helpful in typical Polish installations with chimneys, skylights, or trees. This is a good choice for single-family homes and small businesses that want to maximize energy production from a limited area, and also for improved stability compared to many traditional PERC modules. ## Notable figures - Efficiency of 21.1% matches the \*\*HJT 0-400W\*\* median - At 210.8 W/m² power density, this panel generates 4.4 W/m² more per unit area than \*\*HJT 0-400W\*\* median (206.4 W/m²) - Temperature coefficient of -0.26%/°C matches the \*\*HJT 0-400W\*\* median - At 20.5 kg, weight matches the \*\*HJT 0-400W\*\* median - #9297 for efficiency, #511 for temperature performance out of 14005 panels ## Questions ### Is the Panasonic EVERVOLT 390H series still available for purchase? The EVERVOLT 390H series has been discontinued. In April 2025, Panasonic announced it was exiting the solar panel and energy storage market entirely. No new modules are being manufactured, although some distributors may still carry limited stock. Panasonic has stated it will honor all warranties for previously installed and purchased units. ### What is HJT technology in the EVERVOLT 390H and is it worth the premium? HJT (heterojunction) combines a crystalline silicon wafer with amorphous silicon layers, resulting in a low temperature coefficient (approx. -0.26%/°C vs. -0.35 to -0.40%/°C for standard PERC), higher efficiency, and strong resistance to LID and PID degradation thanks to n-type cells. In practice this means better summer output and more predictable long-term energy yield compared to conventional PERC modules. ### How do the Panasonic EVERVOLT 390H panels perform in high-temperature conditions? High-temperature performance is one of the series' main advantages. With a temperature coefficient of approximately -0.26%/°C, the EVERVOLT 390H loses significantly less power as the roof heats up compared to standard PERC panels. When cell temperature reaches 65°C, power loss is roughly 10% versus 15-16% for typical PERC competitors. On poorly ventilated roofs this translates to meaningfully higher annual energy output. ### What warranty coverage comes with the Panasonic EVERVOLT 390H? Panasonic offered a 25-year product warranty and a 25-year power output warranty for this series. Despite its exit from the solar market in 2025, Panasonic has committed to honoring both warranties for all installed and registered systems. Before purchasing remaining stock from a distributor, confirm that the specific units are properly registered and clarify what after-sales support the seller provides. ### Are the EVERVOLT 390H panels suitable for roofs with chimneys or dormers? Yes. The half-cut cell layout (132 cells) limits the impact of partial shading on overall module output — a shaded section does not suppress production from the remaining cells as severely as in a conventional 60-cell module. The EVERVOLT 390H handles the partial shading conditions typical of Polish residential installations — chimneys, dormers, and nearby trees — better than standard full-cell designs. ### How do the EVERVOLT 390H panels compare to standard PERC modules? Key differences: cell technology (n-type HJT vs. p-type PERC), lower temperature coefficient (better hot-weather output), greater resistance to LID and PID degradation, and generally higher efficiency per square meter. The trade-offs are a higher purchase price and, following Panasonic's market exit, limited ongoing availability. Investors seeking comparable performance should consider HJT or TOPCon modules from other manufacturers currently active in the market. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ds-evpv390h-71ba005dddb5.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +50 W, +2.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, +1.9 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +1.9 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, +1.9 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 | Lighter, +1.9 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 | Lighter, +1.9 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, +1.9 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, +1.8 pp, +5 yr warranty | | [Panasonic EVPV400H](https://comparepv.com/panel/panasonic-evpv400h) | 400 W | +10 W, +0.5 pp | | [Panasonic EVPV410H](https://comparepv.com/panel/panasonic-evpv410h) | 410 W | +20 W, +1.1 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +85 W, +2.9 pp, +15 yr warranty | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +80 W, +2.6 pp, +15 yr warranty | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | +75 W, +2.4 pp, +15 yr warranty | | [Maxeon SPR-MAX6-440](https://comparepv.com/panel/maxeon-spr-max6-440) | 440 W | +50 W, +1.7 pp, +15 yr warranty | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +45 W, +1.6 pp, +5 yr warranty | | [Maxeon SPR-MAX3-430-R](https://comparepv.com/panel/maxeon-spr-max3-430-r) | 430 W | +40 W, +1.6 pp, +15 yr warranty | --- Source: https://comparepv.com/panel/panasonic-evpv390h 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.