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Solarwatt Brand review

SOLARWATT Panel vision GM 3.0 style 370

370 Wp PERC Bifacial
ComparePV verdict

Warranty pick, heavy for its output

Rank 10,604 of 14,005
Compare panels Datasheet PDF
Power (Wp)
370
Typical for its class
Efficiency (%)
19.90
Typical · median 19.90%
Density (Wp/m²)
197.6
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 SOLARWATT Panel vision GM 3.0 series is designed for installations where aesthetics, durability, and stable energy production over the long term are all important. These are modules using a glass-glass technology, where the glass composite effectively protects the solar cells from microcracks, moisture, and accelerated degradation, thereby realistically reducing the risk of reduced production after several seasons.

The style version features a refined, uniform optics - the black frame and consistent finish complement modern roofs better. The use of PERC cells in a half-cut configuration supports high efficiency even under partial shading and variable conditions, typical of the Polish climate. An additional advantage is the long product and performance warranty, which makes it easier to plan the profitability of the investment.

This is a good choice for single-family homes and smaller commercial buildings, where trouble-free operation and an elegant appearance without compromising quality are expected.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.90% 19.90% Typical 12,331
Power density 197.6 199.0 Typical 12,456
Temperature coefficient -0.340 -0.350 Strong · top 15% 8,778
Weight per kWp 67.6 55.8 Weak · bottom 8% 13,253
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
67.6 kg per kWp

Bottom 8% of the PERC 350-400 W segment, against a median of 55.8. Ranked 13,253rd in the whole database.

Notes from the database
  • At 19.9% efficiency, this panel is on par with typical PERC 0-400W modules
  • Power density of 197.6 W/m² packs 3.2 W/m² more into the same footprint vs PERC 0-400W median (194.4 W/m²)
  • At -0.34%/°C, hot weather performance is typical for PERC 0-400W panels
  • At 25.0 kg (4.5 kg above PERC 0-400W median of 20.5 kg), requires checking roof load capacity
  • In the top 88% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 370 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.90 % Typical Segment median 19.90%
Vmpp · Impp 35.50 V · 10.50 A Operating point at max power
Voc · Isc 41.50 V · 11.10 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 333 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 style 370 370 W 19.90% -0.340 25.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.2 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +3.2 pp
GKA210M320W 320 W 23.00% - 16.2 kg -50 W, lighter, +3.1 pp
GKA210M340W 340 W 23.00% - 16.2 kg -30 W, lighter, +3.1 pp
GKA210M360W 360 W 23.00% - 16.2 kg -10 W, lighter, +3.1 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +10 W, lighter, +3.1 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +30 W, lighter, +3.1 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +30 W, lighter, +3.1 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg +10 W, lighter, +3.1 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +2.7 pp, +10 yr warranty
SOLARWATT Panel vision GM 3.0 style 360 360 W 19.40% -0.340 25.0 kg -10 W, -0.5 pp
SOLARWATT Panel vision GM 3.0 style 365 365 W 19.60% -0.340 25.0 kg -0.3 pp
SOLARWATT Panel vision GM 3.0 pure 375 Wp 375 W 20.20% -0.340 25.0 kg +0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +140 W, cooler, +5.1 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +125 W, cooler, +4.9 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +135 W, cooler, +4.8 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 style series still available for purchase?
The SOLARWATT Panel vision GM 3.0 style series has been discontinued and is no longer actively manufactured. Limited stock may still be available through select distributors, but availability is very restricted. If you are looking for a current Solarwatt equivalent with similar glass-glass technology and a 30-year warranty, it is worth contacting an authorized Solarwatt partner about newer models in the active product lineup.
What warranty comes with the SOLARWATT Panel vision GM 3.0 style panels?
Solarwatt provides a 30-year product warranty and a 30-year power output warranty. After 30 years of operation, the module is guaranteed to retain at least 90% of its initial rated power. This is among the longest warranties available for residential solar panels and makes long-term return-on-investment calculations significantly more predictable.
Is the SOLARWATT Panel vision GM 3.0 style a bifacial panel — is it worth the extra cost?
Yes, the GM 3.0 style uses bifacial PERC half-cut cells, meaning the rear side of the module can also capture light reflected from the ground or surrounding surfaces. Over a light-colored surface or snow, this can push real-world yield above the rated 370 Wp. On a typical pitched roof with dark tiles the gain is modest, but bifacial cell construction also contributes to better long-term durability.
How does the SOLARWATT Panel vision GM 3.0 style perform under partial shading?
The PERC half-cut cell layout splits the module into two independent electrical circuits, limiting power losses when part of the panel is shaded by a chimney, dormer, or antenna. Instead of the entire module suffering, only the shaded section is affected while the rest continues at full output. This is especially relevant in Central European climates where low sun angles and irregular roof layouts are common.
Why is the glass-glass construction of the GM 3.0 style more durable than standard glass-backsheet modules?
In glass-glass modules, the rear polymer backsheet is replaced with a second pane of tempered glass, creating a sealed, rigid enclosure. This dramatically reduces moisture and oxygen ingress into the cells, directly lowering long-term degradation — Solarwatt guarantees 90% retained power after 30 years. Glass-glass modules are also more resistant to microcracks caused by mechanical stress and thermal cycling.
Does the black frame on the SOLARWATT Panel vision GM 3.0 style version negatively affect panel efficiency?
The black frame is a purely aesthetic feature and has no impact on the module's electrical performance. The style variant with its uniform black finish and matching cell color is designed for modern rooftops where the appearance of the installation matters. Module efficiency at STC is approximately 19.9%, identical to other GM 3.0 series variants regardless of frame color.
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