--- title: "Solarwatt SOLARWATT Panel vision AM 4.0 pure 405W Solar Panel - Specs & Review | ComparePV" description: "Solarwatt SOLARWATT Panel vision AM 4.0 pure 405W solar panel. Specs: 20.70% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-pure" updated: 2026-09-11 --- # Solarwatt SOLARWATT Panel vision AM 4.0 pure Strong in heat, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Solarwatt - **Model:** SOLARWATT Panel vision AM 4.0 pure - **Series:** SOLARWATT Panel vision AM 4.0 pure - **Rated power:** 405 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 410 W | Typical | | | Module efficiency | 20.70% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight (kg) | 25.4 kg | 22.0 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.70% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight per kWp | 62.7 | 53.0 | Weak - bottom 5% | 12,814 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 10% of the PERC 400-450 W segment, against a median of -0.350. - **30 year performance warranty** - Top 17% of the PERC 400-450 W segment, against a median of 25 yrs. ### Watch out for - **62.7 kg per kWp** - Bottom 5% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,814th in the whole database. - **Best for:** Residential and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 30.90 V - **Current at Pmax (Imp):** 13.10 A - **Open-circuit voltage (Voc):** 37.20 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 25.4 kg - **Area:** 1.95 m2 - **Power density:** 207.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.0 % - **Output after 30 years:** 352 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 10626 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 12814 of 14005 | | Warranty | 21 of 14005 | ## About this series The Solarwatt SOLARWATT Panel vision AM 4.0 pure series consists of glass-glass modules designed for maximum durability and stable operation for many years. The use of **glass-glass laminate** provides exceptional protection against moisture, microcracks, and mechanical loads - which realistically reduces the risk of yield losses over time and limits maintenance issues on the roof. This series utilizes **monocrystalline** cells in a **half-cut** configuration, which helps to better cope with partial shading and increases resistance to losses in typical home installation conditions. An additional advantage is the **PERC bifacial technology**, which can also benefit from reflected light - especially on bright roofs, terraces, and ground-mounted structures. This is a good choice for investors who expect predictable energy production, high weather resistance, and long-term purchase security, supported by **long product and performance warranties**. ## Notable figures - Efficiency of 20.7% matches the \*\*PERC 400-450W\*\* median - Power density of 207.4 W/m² matches the \*\*PERC 400-450W\*\* median - Temperature coefficient of -0.33%/°C matches the \*\*PERC 400-450W\*\* median - Weight of 25.4 kg is 3.4 kg above \*\*PERC 400-450W\*\* median (22.0 kg) - verify structural support - In the top 77% for efficiency among all PERC panels ## Questions ### Is the SOLARWATT Panel vision AM 4.0 pure series still available for purchase? The SOLARWATT Panel vision AM 4.0 pure series has been discontinued and is no longer actively offered by the manufacturer. If you need similar specifications, the newer AM 4.5 series continues the glass-glass technology with improved efficiency. Limited stock may still be available through authorized distributors, so it is worth checking with local resellers. ### What warranty does the SOLARWATT Panel vision AM 4.0 pure come with? The manufacturer provided a 30-year product warranty and a 30-year power output warranty. This is among the longest warranty standards available in the residential PV module market. After 30 years, panels are expected to maintain the power level specified in the manufacturer's degradation curve. Installation by a certified installer is required to keep the warranty valid. ### How does bifacial technology work in the SOLARWATT Panel vision AM 4.0 pure and is it worth the extra cost? Bifacial technology means the module can generate electricity from both its front side and its rear glass, capturing light reflected from the ground or rooftop surface. Combined with the glass-glass laminate of the AM 4.0 pure, the rear side is fully transparent. Real-world bifacial gain depends on the albedo of the surface below — white gravel, light-colored membranes, or snow produce the greatest benefit. On a typical dark pitched roof the additional yield may be modest. ### What is the peak power of the SOLARWATT Panel vision AM 4.0 pure and how competitive is 405 Wp? The module's peak power is 405 Wp, achieved with PERC half-cut monocrystalline cells at approximately 20.7% efficiency — a strong result for the generation at which this series was launched. A typical 6 kWp residential system requires 15 panels of this rating. Current market offerings exceed 430–450 Wp per module, yet the AM 4.0 pure still delivers competitive power density for roof areas with limited space. ### Are SOLARWATT Panel vision AM 4.0 pure modules suitable for pitched roofs with partial shading? Yes. The half-cut monocrystalline cell layout reduces the impact of partial shading from chimneys, dormers, or antennas on the overall string output. Each half-cell operates semi-independently, so shading one section of the module does not fully block the other half. The glass-glass laminate also provides additional protection against the mechanical stress and micro-cracking commonly seen on pitched roof installations. ### Is SOLARWATT a German manufacturer and does that matter for the quality of the AM 4.0 pure panels? Yes, SOLARWATT is headquartered in Dresden, Germany, and is one of the few remaining European PV module manufacturers with a long market track record. While the AM 4.0 pure series is not listed on the Bloomberg NEF Tier 1 ranking, the brand is recognized for rigorous quality control and its own extended warranty standards. For buyers who value European origin and local service support, this can be a meaningful differentiator. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/202455097567c5ba0931520-5c68bca62459.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.6 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, +2.6 pp, -5 yr warranty | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, lighter, +2.6 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, lighter, +2.6 pp | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, +2.6 pp, -5 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +50 W, lighter, +2.6 pp | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.6 pp | | [Solarwatt SOLARWATT Panel vision AM 4.0 black (400 Wp variant)](https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-black-400-wp-variant) | 400 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +4.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +95 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/solarwatt-solarwatt-panel-vision-am-4-0-pure Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.