Skip to main content
Panasonic Brand review

EVPV400H

400 Wp HJT
ComparePV verdict

Middle of its segment, short guarantee

Rank 9,904 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 4%
Efficiency (%)
21.60
Weak · bottom 19%
Density (Wp/m²)
216.2
Weak · bottom 19%
Temp (%/°C)
-0.260
Weak · bottom 23%
Weight (kg)
20.5
Typical · median 23.0 kg
Warranty (yrs)
25
Weak · bottom 8%

Panasonic EverVolt is a module series based on heterojunction (HJT) technology, which effectively combines the advantages of crystalline and amorphous silicon. This advanced solution minimizes energy losses and ensures the highest efficiency even on the hottest days thanks to record-low temperature coefficients. Unlike standard solutions, EverVolt uses N-type cells, which practically eliminates the light-induced degradation (LID) effect and guarantees stable electricity production for decades. It is an ideal choice for homeowners with limited roof space who want to obtain maximum power from every available square meter of mounting surface. These modules effectively solve the problem of efficiency drops in the Polish climate, where summer heat often reduces real yields from traditional installations. What sets this series apart from the competition is the comprehensive Triple Guard warranty protection, covering the product, power, and installer labor costs during potential servicing. High aesthetic quality ensures the panels blend perfectly with modern architecture, while offering minimal annual degradation at a level significantly lower than market standards. This is a solid foundation for investments requiring top-class reliability and maintenance-free operation for many years.

Ranking

113 panels in the segment HJT 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.60% 22.20% Weak · bottom 19% 7,652
Power density 216.2 221.6 Weak · bottom 19% 7,618
Temperature coefficient -0.260 -0.240 Weak · bottom 23% 511
Weight per kWp 51.2 52.4 Typical 4,641
Performance warranty 25 yrs 30 yrs Weak · bottom 8% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
Best for

Residential and hot-climate.

Not ideal for

Owners who want a long output guarantee, tight roof space and roofs where every square metre has to count.

Watch-outs
25 year performance warranty

Bottom 8% of the HJT 400-450 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database.

21.60% module efficiency

Bottom 19% of the HJT 400-450 W segment, against a median of 22.20%.

216.2 watts per square metre

Bottom 19% of the HJT 400-450 W segment, against a median of 221.6.

What owners get
Highest efficiency in the segment

Efficiency of 21.6-22.2% surpasses all comparable 410 Wp modules in the peer comparables list - VDS Renewable (20.4%), Sunket New Energy (21%), and Luxor Solar TOPCon (21.33%). This translates into higher energy yield from the same roof area.

Industry-leading temperature coefficient

HJT technology delivers a temperature coefficient of 0.26%/°C, notably below the typical 0.34-0.40%/°C for PERC or TOPCon modules. This means lower power losses on hot days, which matters during Polish summers.

Triple Guard warranty with labor coverage

The 25-year warranty covers product, power (92% guaranteed power output after 25 years), and installer labor costs during servicing simultaneously - a broader package than the standard linear warranty offered by most tier-1 manufacturers.

LID-resistant N-type cells

The use of N-type cells virtually eliminates light-induced degradation (LID), typical of older P-type technology, resulting in more stable energy production during the first years of operation.

Reputable tier-1 manufacturer

Panasonic is a Japanese conglomerate operating since 1918, with a long history in photovoltaics and a premium brand reputation that historically translated into high build quality and manufacturing control.

Trade-offs
Production discontinued in 2025

Panasonic announced on April 28, 2025 the complete withdrawal from the solar and energy storage market (market share fell from 35% in 2020 to 6% in 2024), ending the EverVolt line. Availability of service, spare parts, and identical replacement modules under warranty is limited - warranty claims may be fulfilled with a third-party equivalent panel or cash-value settlement instead of an original EverVolt unit.

No bifacial variant

The series does not offer bifacial technology, whereas the comparable Luxor Solar Eco Line N-type TOPCon at the same 410 Wp power rating is available in a Glass-Glass bifacial variant, which can increase energy yield with suitable mounting (e.g., on a reflective surface or in ground-mounted arrays).

Notes from the database
  • Module efficiency of 21.6% is 0.6pp below average for HJT 400-450W panels (median: 22.2%)
  • 216.2 W/m² power density is 5.4 W/m² below HJT 400-450W median (221.6 W/m²) - requires larger installation area
  • Temperature coefficient of -0.26%/°C is 0.02pp worse than HJT 400-450W median (-0.24%/°C) - higher losses in summer heat
  • Weight of 20.5 kg (2.5 kg below HJT 400-450W median of 23.0 kg) allows easier transport and roof mounting
  • #7652 for efficiency, #511 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.60 % Weak Segment median 22.20%
Vmpp · Impp 42.10 V · 9.51 A Operating point at max power
Voc · Isc 48.80 V · 10.25 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1821×1016×30 mm · 1.85 m² of roof
Weight 20.5 kg Typical Typical · median 23.0 kg
Coefficient Pmax -0.260 %/°C Weak bottom 23% of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 25 years Weak bottom 8% · median 30 yrs
End-of-warranty output 92.0 % Equals 363 W guaranteed
Degradation 2.00 → 0.25 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Panasonic in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 400 Wp appear here. The rest cover the whole series.

Performance Warranty Performance Warranty Whole series Dependence on Irradiance Dependence on Irradiance Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.260 %/°C against a segment median of -0.240
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Panasonic EVPV400H 400 W 21.60% -0.260 20.5 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +40 W, +1.5 pp, +5 yr warranty
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, +1.4 pp, +5 yr warranty
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, +1.4 pp, +5 yr warranty
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, +1.4 pp, +5 yr warranty
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, +1.4 pp, +5 yr warranty
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, +1.4 pp, +5 yr warranty
EVPV390HK 390 W 21.10% -0.260 20.5 kg -10 W, -0.5 pp
EVPV410H 410 W 22.20% -0.260 20.5 kg +10 W, +0.6 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +75 W, +2.4 pp, +15 yr warranty
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +70 W, +2.1 pp, +15 yr warranty
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg +65 W, +1.9 pp, +15 yr warranty
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +40 W, +1.3 pp, +5 yr warranty
SPR-MAX6-440 440 W 22.80% -0.290 20.9 kg +40 W, +1.2 pp, +15 yr warranty
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +35 W, +1.1 pp, +5 yr warranty
SPR-MAX3-430-R 430 W 22.70% -0.270 21.2 kg +30 W, +1.1 pp, +15 yr warranty
SPR-MAX6-435 435 W 22.50% -0.290 20.9 kg +35 W, +0.9 pp, +15 yr warranty

Found 6 panels of the same or similar size to this one, within ±10 mm. See them here Found 10 panels of the same or similar size to this one, within ±25 mm. See them here Found 86 panels of the same or similar size to this one, within ±50 mm. See them here Found 532 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Panasonic EverVolt series offer, and what does the Triple Guard package include?
Panasonic EverVolt comes with a 25-year product warranty and a 25-year power warranty guaranteeing at least 92% of nominal power output after 25 years of operation. The unique Triple Guard package also covers installer labor costs during any warranty service — an uncommon benefit among module manufacturers. These warranties remain valid even for units purchased before the series was officially discontinued.
What is HJT technology used in the Panasonic EverVolt, and why does it matter?
HJT (heterojunction technology) combines N-type crystalline silicon cells with a thin amorphous silicon layer. This gives EverVolt modules an industry-leading temperature coefficient of just -0.24%/°C, minimizing output losses on hot summer days. N-type cells virtually eliminate LID (Light Induced Degradation), so the panel delivers stable power output throughout its entire 25-year service life.
What is the peak power of a single Panasonic EverVolt panel, and is it suitable for a small roof?
EverVolt modules reach up to 410 Wp peak power thanks to the high efficiency of HJT cells, delivering more energy per square meter than conventional PERC panels. This makes them an ideal choice for homeowners with limited roof space who need maximum power density rather than a larger number of lower-efficiency modules.
How do EverVolt panels perform in winter and overcast conditions typical of Central European climates?
HJT technology with N-type cells shows lower efficiency loss at low temperatures compared to standard PERC or BSF cells. On cloudy days, the amorphous silicon layer provides broader spectral absorption, improving performance under diffuse irradiance. The low temperature coefficient of -0.24%/°C also ensures that winter sunlight is harvested efficiently when panel temperatures approach freezing.
Is the Panasonic EverVolt a bifacial module?
No, the Panasonic EverVolt series is a monofacial module — it generates electricity from the front side only. This means no special high-albedo ground surface or elevated racking systems are required, simplifying installation and reducing BoS costs while still delivering the high efficiency characteristic of HJT cell technology.
Is the Panasonic EverVolt series still available for purchase?
The EverVolt series has been discontinued. In April 2025, Panasonic announced a full exit from the solar module and energy storage market. Limited stock may still be available through distributors with existing inventory, but no new units are being manufactured. Panasonic has committed to honoring all warranties for previously sold and installed products.
Add to compare