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Solarwatt Brand review

SOLARWATT Panel vision AM 4.0 black (405 Wp variant)

405 Wp PERC Bifacial
ComparePV verdict

Strong in heat, heavy for its output

Rank 9,032 of 14,005
Compare panels Datasheet PDF
Power (Wp)
405
Typical for its class
Efficiency (%)
20.80
Typical · median 20.60%
Density (Wp/m²)
207.4
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%

The SOLARWATT Panel vision AM 4.0 black series is designed for those who expect both high durability, stable performance, and a consistent aesthetic. The module utilizes a glass-glass construction, which protects the solar cells better from moisture, microcracks, and mechanical stress compared to typical panels with a film backing. The use of PERC bifacial solar cells in a half-cut configuration supports efficient operation in varying sunlight conditions and helps minimize losses due to partial shading. The black version features a refined design: a black frame and darkened components make the installation look modern, especially on dark roofs and metal roofs. The series also prioritizes investment security: long product and performance warranties, as well as optional insurance, reduce the risk of future costs. This is a good choice for single-family homes, roofs with high aesthetic requirements, and installations where weather resistance and system longevity are important.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.80% 20.60% Typical 10,457
Power density 207.4 206.2 Typical 10,626
Temperature coefficient -0.330 -0.350 Strong · top 10% 8,545
Weight per kWp 62.7 53.0 Weak · bottom 5% 12,814
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 and shaded-installations.

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
62.7 kg per kWp

Bottom 5% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,814th in the whole database.

Notes from the database
  • Efficiency of 20.8% matches the PERC 400-450W median
  • Power density of 207.4 W/m² matches the PERC 400-450W median
  • 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
  • #10457 for efficiency, #8545 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 405 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.80 % Typical Segment median 20.60%
Vmpp · Impp 30.90 V · 13.10 A Operating point at max power
Voc · Isc 37.20 V · 14.00 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
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 352 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
-

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
-

Alternatives

All Solarwatt panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solarwatt SOLARWATT Panel vision AM 4.0 black (405 Wp variant) 405 W 20.80% -0.330 25.4 kg You are here
AIKO-455-MAH54Db 455 W 23.30% -0.260 24.0 kg +50 W, cooler, +2.5 pp
LR5-54HTH-455M 455 W 23.30% -0.290 20.8 kg +50 W, +2.5 pp, -5 yr warranty
YL455CF54 e/2 455 W 23.30% -0.290 20.3 kg +50 W, lighter, +2.5 pp
ESM-455T 455 W 23.30% -0.310 21.0 kg +50 W, lighter, +2.5 pp
SE5-54HBC-455W 455 W 23.30% -0.290 20.8 kg +50 W, +2.5 pp, -5 yr warranty
JST-EDMH-(445-465)W-TD (455W class) 455 W 23.30% -0.300 20.5 kg +50 W, lighter, +2.5 pp
LX-455M/182R-96+ GG 455 W 23.30% -0.260 23.5 kg +50 W, cooler, +2.5 pp
SOLARWATT Panel vision AM 4.0 black (400 Wp variant) 400 W 20.50% -0.330 25.4 kg -0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +105 W, cooler, +4.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +90 W, cooler, +4.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +100 W, cooler, +3.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +85 W, cooler, +3.7 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +95 W, cooler, +3.7 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +95 W, cooler, +3.7 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 part of the manufacturer's standard lineup. Some units may still be available as end-of-stock inventory at select distributors. Before ordering, confirm availability with your supplier and consider the current vision AM 4.5 series as an updated alternative with comparable specifications.
What warranty does the SOLARWATT Panel vision AM 4.0 black come with?
Solarwatt provides a 30-year product warranty and a 30-year power warranty, guaranteeing at least 87% of rated output after three decades of operation. The manufacturer also includes a 5-year FullCoverage insurance policy at no additional cost, covering potential yield losses if the modules underperform. This is among the longest combined warranties available in the residential PV market.
Why does the SOLARWATT Panel vision AM 4.0 black use a glass-glass construction and what does it mean for long-term durability?
Instead of a standard polymer backsheet, the vision AM 4.0 black uses tempered glass on both front and rear surfaces. This design significantly reduces moisture ingress, lowers the risk of micro-cracks caused by mechanical loads such as snow or wind pressure, and extends the module's service life. The glass-glass structure is the primary reason Solarwatt can back this panel with a 30-year product warranty.
What are bifacial PERC half-cut cells and do they actually improve energy yield?
PERC technology adds a passivation layer to the rear of each cell, reflecting photons back for a second absorption pass and boosting efficiency. The half-cut design splits each cell in two, reducing resistive losses and improving shading tolerance. Bifacial capability allows the module to generate additional power from diffuse light reflected off roofing surfaces. Together, these technologies support stable yields under variable irradiance conditions.
Do the all-black SOLARWATT vision AM 4.0 black panels run hotter and does that reduce output?
The black frame and tinted glass can slightly raise the module's operating temperature compared to silver-framed equivalents. The panel's temperature coefficient is approximately -0.33%/°C, which is typical for PERC modules and fully acceptable under Central European climate conditions. For most rooftop installations on dark roof tiles, the aesthetic benefit clearly outweighs this marginal thermal penalty.
How much does the SOLARWATT vision AM 4.0 black weigh and does it require roof reinforcement?
The panel weighs approximately 25.4 kg, notably more than a comparable glass-foil module at 20-22 kg, as a direct result of the dual-glass construction. This additional load must be factored into the installation design. For most modern roofs it presents no structural issue, but for older buildings a load-bearing assessment by a structural engineer or certified installer is recommended before proceeding.
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