--- title: "Solarwatt SOLARWATT Panel vision GM 3.0 pure 385 Wp 385W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel vision GM 3.0 pure 385 Wp 385W solar panel. Specs: 20.70% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-pure-385-wp" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision GM 3.0 pure 385 Wp Efficiency leader, heavy for its output 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel vision GM 3.0 pure 385 Wp - **Series:** SOLARWATT Panel vision GM 3.0 pure - **Rated power:** 385 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 385 W | 380 W | Typical | | | Module efficiency | 20.70% | 19.90% | Strong - top 6% | 10,764 | | Power density | 205.6 | 199.0 | Strong - top 9% | 11,163 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 15% | 8,778 | | Weight (kg) | 25.0 kg | 21.4 kg | Weak - bottom 12% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.70% | 19.90% | Strong - top 6% | 10,764 | | Power density | 205.6 | 199.0 | Strong - top 9% | 11,163 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 15% | 8,778 | | Weight per kWp | 64.9 | 55.8 | Weak - bottom 12% | 13,039 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Strengths - **20.70% module efficiency** - Top 6% of the PERC 350-400 W segment, against a median of 19.90%. Ranked 10,764th in the whole database. - **205.6 watts per square metre** - Top 9% of the PERC 350-400 W segment, against a median of 199.0. Ranked 11,163rd in the whole database. - **30 year performance warranty** - Top 13% of the PERC 350-400 W segment, against a median of 25 yrs. ### Watch out for - **64.9 kg per kWp** - Bottom 12% of the PERC 350-400 W segment, against a median of 55.8. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 385 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 35.70 V - **Current at Pmax (Imp):** 10.90 A - **Open-circuit voltage (Voc):** 41.80 V - **Short-circuit current (Isc):** 11.50 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 ### Physical - **Length:** 1780 mm - **Width:** 1052 mm - **Thickness:** 40 mm - **Weight:** 25.0 kg - **Area:** 1.87 m2 - **Power density:** 205.6 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:** 347 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 11163 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 13039 of 14005 | | Warranty | 21 of 14005 | ## About this series 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. ## Notable figures - At 20.7% efficiency, this panel is 1.2pp above typical \*\*PERC 0-400W\*\* modules (median: 19.4%) - 205.6 W/m² power density - 11.2 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 - Ranked #10764 out of 14005 panels for efficiency in the database ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Data-sheet-SOLARWATT-Panel-vision-GM-30-pure-en-ac4c32e9832c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -45 W, lighter, +2.3 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | -25 W, lighter, +2.3 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +2.3 pp | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +15 W, lighter, +2.3 pp | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +15 W, lighter, +2.3 pp | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +2.3 pp | | [Luxor Solar LX-435M/182-108+ GG](https://comparepv.com/panel/luxor-solar-lx-435m-182-108-gg-1) | 435 W | +50 W, cooler, +2.1 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +50 W, cooler, +2.0 pp | | [Maxeon SPR-MAX3-430-R](https://comparepv.com/panel/maxeon-spr-max3-430-r) | 430 W | Cooler, +2.0 pp, +10 yr warranty | | [Luxor Solar LX-435M/182-108+](https://comparepv.com/panel/luxor-solar-lx-435m-182-108) | 435 W | +50 W, +1.9 pp, -5 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 | -25 W, -1.3 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 | -20 W, -1.1 pp | | [Solarwatt SOLARWATT Panel vision GM 3.0 pure 370 Wp](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-pure-370-wp) | 370 W | -15 W, -0.8 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 | -10 W, -0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +125 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +110 W, cooler, +4.1 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-gm-3-0-pure-385-wp Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.