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Solarwatt Brand review

SOLARWATT Panel vision GM 3.0 pure 375 Wp

375 Wp PERC
ComparePV verdict

Warranty pick, heavy for its output

Rank 10,297 of 14,005
Compare panels Datasheet PDF
Power (Wp)
375
Typical for its class
Efficiency (%)
20.20
Typical · median 19.90%
Density (Wp/m²)
200.3
Typical · median 199.0
Temp (%/°C)
-0.340
Strong · top 15%
Weight (kg)
25.0
Weak · 3.6 kg above median
Warranty (yrs)
30
Strong · top 13%

The SOLARWATT Panel vision GM 3.0 pure series, featuring glass-on-glass modules, are designed for stable, long-term operation and high yields, even in challenging conditions. The use of PERC monocrystalline solar cells in a half-cut configuration helps minimize losses due to partial shading while also improving the module's performance under varying sunlight conditions. A key advantage of this series is its robust construction, where the cells are permanently sealed within a glass-on-glass laminate - this allows the panel to better withstand mechanical loads, temperature changes, and humidity, which in turn reduces the risk of power drops over time.

For the investor, this means high reliability and predictable energy production, while for the installer, it means a module that is easy to use on residential roofs, commercial buildings, and projects requiring increased durability. An additional distinguishing feature is a long product and performance warranty, which enhances the investment's profitability and sets this series apart from many standard panels on the market.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.20% 19.90% Typical 11,956
Power density 200.3 199.0 Typical 12,174
Temperature coefficient -0.340 -0.350 Strong · top 15% 8,778
Weight per kWp 66.7 55.8 Weak · bottom 10% 13,180
Performance warranty 30 yrs 25 yrs Strong · top 13% 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 shaded-installations.

Not ideal for

Weight-limited structures.

Strengths
30 year performance warranty

Top 13% of the PERC 350-400 W segment, against a median of 25 yrs.

-0.340 %/°C temperature coefficient

Top 15% of the PERC 350-400 W segment, against a median of -0.350.

Watch-outs
66.7 kg per kWp

Bottom 10% of the PERC 350-400 W segment, against a median of 55.8.

Notes from the database
  • At 20.2% efficiency, this panel is 0.8pp above typical PERC 0-400W modules (median: 19.4%)
  • At 200.3 W/m² power density, this panel generates 5.9 W/m² more per unit area than PERC 0-400W median (194.4 W/m²)
  • At -0.34%/°C, hot weather performance is typical for PERC 0-400W panels
  • Weight of 25.0 kg is 4.5 kg above PERC 0-400W median (20.5 kg) - verify structural support
  • #11956 for efficiency, #8778 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 375 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.20 % Typical Segment median 19.90%
Vmpp · Impp 34.90 V · 10.80 A Operating point at max power
Voc · Isc 41.50 V · 11.40 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1780×1052×40 mm · 1.87 m² of roof
Weight 25.0 kg Weak Weak · 3.6 kg above median
Cells 120 · PERC Monocrystalline
Coefficient Pmax -0.340 %/°C Strong top 15% of its segment
Coefficient Voc · Isc -0.270 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Strong top 13% · median 25 yrs
End-of-warranty output 90.0 % Equals 338 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
-0.340 %/°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 GM 3.0 pure 375 Wp 375 W 20.20% -0.340 25.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.9 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.9 pp
GKA210M340W 340 W 23.00% - 16.2 kg -35 W, lighter, +2.8 pp
GKA210M360W 360 W 23.00% - 16.2 kg -15 W, lighter, +2.8 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +2.8 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +25 W, lighter, +2.8 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +25 W, lighter, +2.8 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +2.8 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.4 pp, +10 yr warranty
SPR-MAX3-425-R 425 W 22.40% -0.270 21.2 kg Cooler, +2.2 pp, +10 yr warranty
SOLARWATT Panel vision GM 3.0 style 360 360 W 19.40% -0.340 25.0 kg -15 W, -0.8 pp
SOLARWATT Panel vision GM 3.0 style 365 365 W 19.60% -0.340 25.0 kg -10 W, -0.6 pp
SOLARWATT Panel vision GM 3.0 pure 370 Wp 370 W 19.90% -0.340 25.0 kg -0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +135 W, cooler, +4.8 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +120 W, cooler, +4.6 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +130 W, cooler, +4.5 pp

Found 42 panels of the same or similar size to this one, within ±10 mm. See them here Found 269 panels of the same or similar size to this one, within ±25 mm. See them here Found 398 panels of the same or similar size to this one, within ±50 mm. See them here Found 4142 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 GM 3.0 pure series still available for purchase?
The SOLARWATT Panel vision GM 3.0 pure series has been discontinued and is no longer offered as a new product through regular distribution channels. Occasional stock may be found at distributors or on the secondary market. If you require similar glass-glass construction and performance characteristics from Solarwatt, ask your supplier about currently available successor series from this manufacturer.
What warranty does the SOLARWATT Panel vision GM 3.0 pure come with?
The series carries a 30-year product warranty covering material and manufacturing defects, as well as a 30-year power output warranty. This is among the longest warranty terms available in the PV module market, far exceeding the 10–12 year product warranty standard at many competitors. Such extended coverage significantly strengthens the investment case and long-term yield predictability.
What does the glass-glass construction in the SOLARWATT Panel vision GM 3.0 pure mean and why does it matter?
In the GM 3.0 pure series, the PERC cells are encapsulated between two tempered glass panes instead of a conventional polymer backsheet. This laminate structure provides superior moisture resistance, handles higher mechanical loads from snow and wind, and withstands thermal cycling better over decades of operation. The result is slower module degradation and a lower risk of power output loss over the panel's service life.
What are PERC half-cut cells and how do they benefit the GM 3.0 pure panel?
PERC (Passivated Emitter and Rear Cell) technology adds a passivation layer on the rear side of each cell to reduce charge recombination and boost efficiency. Cutting each cell in half (half-cut) lowers internal current resistance and reduces shading losses — if part of the panel is shaded by a chimney or dormer, the remaining cells continue operating near full power. This makes the 385 Wp module more resilient in real-world, non-ideal installation conditions.
Does the SOLARWATT Panel vision GM 3.0 pure perform well in winter and at low temperatures?
Yes, low temperatures are actually beneficial for silicon cells — efficiency increases as temperature drops below 25°C STC. The power temperature coefficient for the GM 3.0 pure series is approximately -0.29%/°C, meaning the module can exceed its rated 385 Wp output on cold, sunny days. The glass-glass construction also offers superior resistance to snow loads compared to modules with polymer backsheets.
Is the SOLARWATT GM 3.0 pure (385 Wp) suitable for installation on a pitched residential roof?
Yes, pitched residential roofs are the primary use case for this series. Glass-glass modules are slightly heavier than standard modules, so roof load capacity should be confirmed with a qualified installer before mounting. The panel performs well in this application thanks to its moisture resistance and durability in variable weather conditions, while the half-cut PERC technology minimizes shading losses from chimneys or roof windows.
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