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Solarwatt Brand review

SOLARWATT Panel vision AM 4.0 black 400 Wp

400 Wp PERC Bifacial 2000%
ComparePV verdict

Strong in heat, heavy for its output

Rank 9,466 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 9%
Efficiency (%)
20.50
Typical · median 20.60%
Density (Wp/m²)
204.8
Typical · median 206.2
Temp (%/°C)
-0.330
Strong · top 10%
Weight (kg)
25.4
Weak · 3.4 kg above median
Warranty (yrs)
30
Strong · top 17%

Solarwatt Panel vision AM 4.0 black is an advanced glass-glass solution that sets new standards in the durability and aesthetics of modern photovoltaic systems. The use of double tempered glass instead of a traditional backsheet makes the modules almost completely resistant to external factors, chemical degradation, and extreme mechanical stress. The bifacial cell technology used in this series enables the generation of additional energy also from reflected radiation, which significantly increases the real yield of the entire installation in various weather conditions. Thanks to the elegant all-black finish, these panels are an optimal choice for demanding investors for whom roof design is just as important as high efficiency. This solution effectively addresses the problem of component aging, offering users record-breaking operational durability, confirmed by one of the longest product warranties on the market. Compared to the competition, the AM 4.0 black series stands out with its uncompromising approach to fire safety and exceptional resistance to harsh environmental conditions. This is an offer for those who prioritize maximum capital protection and trouble-free operation for decades, combining precise technical engineering with attention to building architecture. By choosing these modules, you gain the certainty of stable power production while maintaining the highest quality standards.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.50% 20.60% Typical 11,308
Power density 204.8 206.2 Typical 11,370
Temperature coefficient -0.330 -0.350 Strong · top 10% 8,545
Weight per kWp 63.5 53.0 Weak · bottom 3% 12,899
Performance warranty 30 yrs 25 yrs Strong · top 17% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 1 caution
Best for

Residential, commercial and BIPV.

Not ideal for

Weight-limited structures.

Strengths
-0.330 %/°C temperature coefficient

Top 10% of the PERC 400-450 W segment, against a median of -0.350.

30 year performance warranty

Top 17% of the PERC 400-450 W segment, against a median of 25 yrs.

Watch-outs
63.5 kg per kWp

Bottom 3% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,899th in the whole database.

Notes from the database
  • Efficiency of 20.5% matches the PERC 400-450W median
  • At 204.8 W/m² power density, roof space requirements are typical for PERC 400-450W panels
  • Temperature coefficient of -0.33%/°C matches the PERC 400-450W median
  • Weight of 25.4 kg is 3.4 kg above PERC 400-450W median (22.0 kg) - verify structural support
  • #11308 for efficiency, #8545 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 20.50 % Typical Segment median 20.60%
Vmpp · Impp 30.70 V · 13.00 A Operating point at max power
Voc · Isc 37.10 V · 13.90 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×35 mm · 1.95 m² of roof
Weight 25.4 kg Weak Weak · 3.4 kg above median
Cells 108 · PERC Monocrystalline
Bifaciality 2000 % Rear output as a share of front
Coefficient Pmax -0.330 %/°C Strong top 10% of its segment
Coefficient Voc · Isc -0.250 · 0.050 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Strong top 17% · median 25 yrs
End-of-warranty output 87.0 % Equals 348 W guaranteed

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
-
With bifacial gain
-

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

Heat losses
-0.330 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Alternatives

All Solarwatt panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solarwatt SOLARWATT Panel vision AM 4.0 black 400 Wp 400 W 20.50% -0.330 25.4 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +40 W, cooler, +2.6 pp
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, lighter, +2.6 pp
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, cooler, +2.5 pp
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, cooler, +2.5 pp
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, cooler, +2.5 pp
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, cooler, +2.5 pp
SOLARWATT Panel vision AM 4.0 pure 405 W 20.70% -0.330 25.4 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +110 W, cooler, +4.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +95 W, cooler, +4.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +105 W, cooler, +4.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +90 W, cooler, +4.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +100 W, cooler, +4.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +100 W, cooler, +4.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Solarwatt Panel vision AM 4.0 black series still available for purchase?
The Solarwatt Panel vision AM 4.0 black series has been discontinued and is no longer available as new stock through authorized distributors. Its successor is the AM 4.5 series, offering higher output up to 425 Wp while retaining the same glass-glass construction. If you specifically need this model, check whether any distributors still hold remaining inventory or consider the secondary market.
What warranty does the Solarwatt vision AM 4.0 black carry and what does it cover?
Solarwatt backed this panel with a 30-year product warranty and a 30-year power output warranty, placing it among the longest warranty commitments in the residential PV market. The product warranty covers material and manufacturing defects, while the power warranty guarantees that output stays above a defined percentage of the rated 405 Wp over three decades. Full terms are available in the manufacturer's documentation.
What does bifacial technology mean in the AM 4.0 black and is it worth the premium?
Bifacial PERC cells in the AM 4.0 black generate power from both direct irradiance on the front side and reflected irradiance on the rear side. On light-colored roofing or elevated ground-mount installations, the bifacial gain can add several percentage points of additional yield compared to a standard monofacial module. Actual benefit depends on albedo, tilt angle, and row spacing, so a site-specific simulation is recommended before purchase.
How does the glass-glass construction of the AM 4.0 black differ from standard backsheet modules?
Conventional panels use a polymer backsheet that is susceptible to UV degradation, cracking, and moisture ingress over time. The AM 4.0 black replaces this with a second layer of 2 mm tempered glass, significantly improving resistance to mechanical stress, hail, chemical degradation, and potential-induced degradation (PID). This durability advantage is the primary reason Solarwatt was able to offer a 30-year product warranty on the series.
How do Solarwatt vision AM 4.0 black panels perform in winter and at low temperatures?
The panel has a temperature coefficient of Pmax of -0.33%/°C, meaning output actually rises above the nominal 405 Wp when ambient temperatures drop below the 25°C STC reference. On cold, clear winter days typical of Central Europe, the modules can outperform their rated power. The glass-glass structure also reduces thermally induced microcracks, maintaining PERC cell integrity through repeated freeze-thaw cycles.
How heavy is the Solarwatt AM 4.0 black and can it be installed on a standard roof structure?
The module measures 1722 × 1134 × 35 mm and weighs approximately 25.4 kg, slightly heavier than comparable backsheet panels due to the dual glass design. Most standard pitched-roof timber structures can accommodate this load without reinforcement, but a qualified installer should verify roof capacity and ensure the racking system is rated for the weight. The panel dimensions are compatible with common rail-based mounting systems.
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