--- title: "Solarwatt SOLARWATT Panel vision GM 3.0 style 370 Wp 370W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel vision GM 3.0 style 370 Wp 370W solar panel. Specs: 19.90% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-style-370-wp" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision GM 3.0 style 370 Wp Warranty pick, heavy for its output 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel vision GM 3.0 style 370 Wp - **Series:** SOLARWATT Panel vision GM 3.0 style - **Rated power:** 370 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 380 W | Typical | | | 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 (kg) | 25.0 kg | 21.4 kg | Weak - bottom 8% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### 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 out for - **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. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 19.90 % - **Voltage at Pmax (Vmp):** 35.50 V - **Current at Pmax (Imp):** 10.50 A - **Open-circuit voltage (Voc):** 41.50 V - **Short-circuit current (Isc):** 11.10 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.270 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 1780 mm - **Width:** 1052 mm - **Thickness:** 40 mm - **Weight:** 25.0 kg - **Area:** 1.87 m2 - **Power density:** 197.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.0 % - **Output after 30 years:** 333 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12331 of 14005 | | Power density | 12456 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 13253 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - Efficiency of 19.9% matches the \*\*PERC 0-400W\*\* median - 197.6 W/m² power density - 3.2 W/m² more than \*\*PERC 0-400W\*\* median (194.4 W/m²), more power per roof area - Temperature coefficient of -0.34%/°C matches the \*\*PERC 0-400W\*\* median - At 25.0 kg (4.5 kg above \*\*PERC 0-400W\*\* median of 20.5 kg), requires checking roof load capacity - #12331 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/174084210667c5a96fdd0c2-d6bcb21837bb.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.2 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.2 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -30 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | -10 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +10 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, lighter, +3.1 pp | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | +10 W, lighter, +3.1 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.7 pp, +10 yr warranty | | [Solarwatt SOLARWATT Panel vision GM 3.0 style 360](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-style-360) | 360 W | -10 W, -0.5 pp | | [Solarwatt SOLARWATT Panel vision GM 3.0 style 365](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-style-365) | 365 W | -0.3 pp | | [Solarwatt SOLARWATT Panel vision GM 3.0 pure 375 Wp](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-pure-375-wp) | 375 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +140 W, cooler, +5.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +125 W, cooler, +4.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +135 W, cooler, +4.8 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-style-370-wp Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.