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Solarwatt Brand review

SOLARWATT Panel classic AM 2.0 pure - 35 mm (400 Wp variant)

400 Wp PERC
ComparePV verdict

Strong in heat, no clear weak spot

Rank 11,685 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 9%
Efficiency (%)
20.70
Typical · median 20.60%
Density (Wp/m²)
206.5
Typical · median 206.2
Temp (%/°C)
-0.330
Strong · top 10%
Weight (kg)
19.7
Strong · 2.3 kg below median
Warranty (yrs)
25
Typical · median 25 yrs

The Solarwatt SOLARWATT Panel classic AM 2.0 pure - 35 mm is a refined module with a glass-foil construction, designed for stable operation in typical roof and ground-mounted installations. The use of monocrystalline cells in a half-cut configuration and multi-wire connections promotes higher resistance to microcracks and improved performance under partial shading, which translates to more reliable energy yield over the year. Compared to many competing solutions, it stands out due to its full PID protection and LeTID testing, which are important for maintaining performance over time. The hardened glass with an anti-reflective coating supports efficient light capture even with less ideal angles. The modules are also prepared for harsh environments - the declared resistance to ammonia and salt fog makes it easier to design installations near farms or coastal areas. This is a reasonable choice for investors who want quality and durability without paying a premium for "premium" features.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 20.60% Typical 10,764
Power density 206.5 206.2 Typical 10,990
Temperature coefficient -0.330 -0.350 Strong · top 10% 8,545
Weight per kWp 49.2 53.0 Strong · top 11% 2,821
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

Residential, commercial and shaded-installations.

Strengths
-0.330 %/°C temperature coefficient

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

49.2 kg per kWp

Top 11% of the PERC 400-450 W segment, against a median of 53.0.

Notes from the database
  • Efficiency of 20.7% matches the PERC 400-450W median
  • Power density of 206.5 W/m² matches the PERC 400-450W median
  • Temperature coefficient of -0.33%/°C matches the PERC 400-450W median
  • At 19.7 kg, this panel is 2.3 kg lighter than PERC 400-450W median (22.0 kg) - easier handling during installation
  • In the top 77% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Typical Segment median 20.60%
Vmpp · Impp 30.40 V · 13.20 A Operating point at max power
Voc · Isc 37.20 V · 13.60 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1708×1134×35 mm · 1.94 m² of roof
Weight 19.7 kg Strong Strong · 2.3 kg below 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 15 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 327 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 classic AM 2.0 pure - 35 mm (400 Wp variant) 400 W 20.70% -0.330 19.7 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg Cooler, +2.4 pp, +5 yr warranty
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, +2.4 pp, +5 yr warranty
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, +2.3 pp, +5 yr warranty
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, +2.3 pp, +5 yr warranty
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, +2.3 pp, +5 yr warranty
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, +2.3 pp, +5 yr warranty
SOLARWATT Panel classic AM 2.0 pure - 35 mm (405 Wp variant) 405 W 20.90% -0.330 19.7 kg Very close match
SOLARWATT Panel classic AM 2.0 pure - 35 mm (410 Wp variant) 410 W 21.20% -0.330 19.7 kg +10 W, +0.5 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +110 W, cooler, +4.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +95 W, cooler, +4.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +105 W, cooler, +4.0 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +90 W, cooler, +3.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +100 W, cooler, +3.8 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +100 W, cooler, +3.8 pp

Found 26 panels of the same or similar size to this one, within ±10 mm. See them here Found 1816 panels of the same or similar size to this one, within ±25 mm. See them here Found 2029 panels of the same or similar size to this one, within ±50 mm. See them here Found 3944 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the SOLARWATT Panel classic AM 2.0 pure 35 mm series still available for purchase?
The SOLARWATT Panel classic AM 2.0 pure 35 mm series has been discontinued and is no longer offered as a new product through regular distribution channels. Buyers may still find limited stock with some distributors, but availability is not guaranteed. We recommend contacting an authorized Solarwatt dealer or considering a currently manufactured Solarwatt model with comparable specifications.
What warranty does the SOLARWATT Panel classic AM 2.0 pure 35 mm come with?
Solarwatt provides a 15-year product warranty covering manufacturing defects and materials, as well as a 25-year linear power output warranty. The power warranty guarantees the panel maintains output above the declared minimum degradation threshold for a full quarter century. For a glass-film module, this is a strong commitment and reflects Solarwatt's focus on long-term reliability over the system's lifetime.
What does half-cut PERC technology mean and how does it benefit the SOLARWATT classic AM 2.0 pure?
PERC (Passivated Emitter and Rear Cell) adds a reflective rear passivation layer that recaptures unabsorbed light, boosting cell efficiency. Half-cut splitting reduces internal resistance and limits mismatch losses under partial shading. Combined with multiwire interconnection — which replaces thick busbars with multiple thin wires — the panel gains better resistance to microcracks and delivers a higher annual energy yield compared to conventional full-cell designs.
Is the SOLARWATT Panel classic AM 2.0 pure 35 mm suitable for coastal or agricultural environments?
Yes, the series is rated for demanding environments. Solarwatt certifies salt spray resistance, making it suitable for coastal installations where corrosive sea air can degrade cheaper modules. The ammonia resistance certification also makes it appropriate for sites near poultry or livestock farms, where ammonia vapors are a common cause of premature frame and junction box deterioration.
What is the peak power of the SOLARWATT classic AM 2.0 pure 35 mm and is it suitable for a residential rooftop system?
The panel's rated peak power is 410 Wp. A typical 6–8 kWp residential system would require approximately 15–20 modules. The half-cut PERC cells and full PID protection maintain solid output even under partial shading — a common issue on smaller rooftops with chimneys or dormers. The glass-film construction also results in lower weight compared to glass-glass modules, which simplifies rooftop installation.
How does PID protection and LeTID testing in SOLARWATT classic AM 2.0 pure differ from budget alternatives?
PID (Potential Induced Degradation) is power loss triggered by voltage differentials in the system — Solarwatt certifies full PID resistance, which is critical in high-voltage DC strings. LeTID (Light and Elevated Temperature Induced Degradation) is a more recently identified issue specific to PERC cells: output can decline temporarily under combined light and heat stress. Having LeTID testing on record means Solarwatt has validated the series against this effect, a step many budget manufacturers skip entirely.
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