--- title: "Heckert Solar ZEUS 3.2 285WP FullBlack Solar Panel: Specs & Datasheet | ComparePV" description: "Heckert Solar ZEUS 3.2 285WP FullBlack solar panel. Specs: 23.14% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack" image: "https://comparepv.com/og/panel/heckert-solar-zeus-3-2-285wp-fullblack.png" updated: 2026-10-23 --- # Heckert Solar ZEUS 3.2 285WP FullBlack Efficiency leader, no clear weak spot 1,430 panels in the 185-385 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** ZEUS 3.2 285WP FullBlack - **Series:** ZEUS 3.2 - **Rated power:** 285 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against 185-385 W band, all technologies (1430 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 285 W | 330 W | Weak - bottom 22% | | | Module efficiency | 23.14% | 18.88% | Strong - top 1% | 1,554 | | Power density | 231.4 | 188.2 | Strong - top 1% | 1,664 | | Temperature coefficient | -0.260 | -0.360 | Strong - top 3% | 515 | | Weight (kg) | 15.6 kg | 20.0 kg | Strong - top 19% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 19% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.14% | 18.88% | Strong - top 1% | 1,554 | | Power density | 231.4 | 188.2 | Strong - top 1% | 1,664 | | Temperature coefficient | -0.260 | -0.360 | Strong - top 3% | 515 | | Weight per kWp | 54.7 | 61.8 | Strong - top 19% | 9,228 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 19% | 21 | ### Strengths - **23.14% module efficiency** - Top 1% of the 185-385 W band, against a median of 18.88%. Ranked 1,554th in the whole database. - **231.4 watts per square metre** - Top 1% of the 185-385 W band, against a median of 188.2. Ranked 1,664th in the whole database. - **-0.260 %/°C temperature coefficient** - Top 3% of the 185-385 W band, against a median of -0.360. Ranked 515th in the whole database. - **Best for:** Residential and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 285 W - **Efficiency:** 23.14 % - **Voltage at Pmax (Vmp):** 19.87 V - **Current at Pmax (Imp):** 14.34 A - **Open-circuit voltage (Voc):** 24.02 V - **Short-circuit current (Isc):** 16.64 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.200 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 64 - **Bifacial:** yes ### Physical - **Length:** 1606 mm - **Width:** 767 mm - **Thickness:** 35 mm - **Weight:** 15.6 kg - **Area:** 1.23 m2 - **Power density:** 231.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 242 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1554 of 14129 | | Power density | 1664 of 14129 | | Temperature coefficient | 515 of 14129 | | Weight | 9228 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Top-tier efficiency in its power class** - At 23.14% efficiency, this module outperforms comparable 285 Wp panels by 32-60% (Yingli LF285P6-60: 17.52%, Exiom EX270-285P(B)-60: 17.4%, Solitek SOLID Solrif: 14.45%). This yields a markedly smaller footprint for the same power output - a key advantage on roofs with limited space. - **Back-contact cells with no visible busbars** - Back-contact technology eliminates front-side cells and busbars, producing a uniform FullBlack aesthetic while letting neighboring cell segments operate independently, reducing power loss under partial shading (e.g., from a chimney or antenna). - **Bifacial design boosts energy yield** - The module captures reflected light on its rear side, increasing total energy production without expanding the installation's footprint - a clear edge over the monofacial poly modules in the comparison set. - **30-year product and power warranty** - Heckert Solar, a German manufacturer operating since 1992, provides a 30-year product warranty and a 30-year performance warranty directly from the manufacturer - well beyond the typical 12-25-year product / 25-30-year power warranties offered by many competitors. - **Slim frame and low weight ease installation** - The 35 mm frame and low module weight simplify transport and mounting, relevant for pitched-roof retrofits on single-family homes where the FullBlack aesthetic also matters as much as output. ## Cons - **Low 285 Wp rating limits scale efficiency** - Compared to modern 400-500+ Wp modules, a 285 Wp rating requires more panels (and more MC4 connectors, cabling, and optimizers) to reach the same system capacity, raising BoS costs on larger commercial projects, even though it performs well on compact residential roof areas. ## About this series The ZEUS 3.2 FullBlack series is a compact photovoltaic module built for roofs where every square centimeter of surface counts. Its **back-contact technology** removes visible cells and busbars from the front side, giving the panel a uniform black finish while also reducing losses caused by partial shading - neighboring cell segments operate independently, which translates into more stable energy yield even when a chimney or antenna casts a shadow. Thanks to its **bifacial** design, the module also captures light reflected off the rear side, boosting total energy output without increasing the installed footprint. A slim 35mm frame and **lightweight design** make transport and installation easier, while the **FullBlack aesthetic** lets the panel blend seamlessly into the architecture of modern single-family homes, where roof appearance matters as much as efficiency. It's a fitting choice for private investors and installers seeking elegant, premium German quality, backed by a **30-year product and performance warranty** provided directly by the manufacturer, with no intermediaries. ## Notable figures - Efficiency of 23.1% is 1.9pp above the \*\*Back Contact 0-400W\*\* median (21.2%) - Power density of 231.4 W/m² packs 18.9 W/m² more into the same footprint vs \*\*Back Contact 0-400W\*\* median (212.5 W/m²) - Temperature coefficient of -0.26%/°C matches the \*\*Back Contact 0-400W\*\* median - 15.6 kg weight - 3.4 kg lighter than \*\*Back Contact 0-400W\*\* median (19.0 kg), reducing installation effort - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### What is back-contact technology in Heckert Solar ZEUS 3.2 panels and is it worth it? Back-contact technology moves busbars and cell interconnects to the rear of the panel, giving the front a uniform all-black appearance with no visible stripes. Each cell segment also operates independently, reducing output loss from partial shading caused by chimneys or antennas. This delivers both a cleaner aesthetic and a real energy benefit on roofs with obstructions. ### Are ZEUS 3.2 FullBlack panels suitable for a small sloped roof? Yes, the ZEUS 3.2 series was designed as a compact module for roofs where every centimeter of space matters. Its small footprint, slim 35 mm frame, and low weight make transport and installation on typical sloped roof structures easier, while the uniform FullBlack look blends well with single-family home architecture. ### What does bifacial design mean for the ZEUS 3.2 panel, and does it meaningfully increase energy output? Bifacial construction lets the module capture light reflected off the rear side, not just direct light on the front. This adds extra energy generation without increasing the installation's footprint, an effect that's especially noticeable over bright, reflective roofing surfaces, though actual gains depend on mounting and surroundings. ### What is the maximum power output of the Heckert Solar ZEUS 3.2 panel, and what is it best suited for? The ZEUS 3.2 FullBlack module reaches up to 285 Wp of maximum power. Given its compact dimensions, it's primarily intended for small roof areas where aesthetics and efficient use of limited space matter more than maximizing total array power. ### What warranty applies to ZEUS 3.2 panels, and who provides it? Heckert Solar provides a 30-year product warranty and a 30-year performance warranty on ZEUS 3.2 modules, issued directly by the German manufacturer with no intermediaries. This is among the longer warranty terms available in the PV market, which matters when choosing a supplier for decades of system operation. ### How does ZEUS 3.2 differ from standard black solar panels without back-contact technology? In conventional full-black panels, busbars and cell interconnects remain visible on the front, slightly disrupting color uniformity. In ZEUS 3.2, back-contact technology relocates these elements to the rear, resulting in a cleaner, more uniform black finish and better resilience to partial shading thanks to independently operating cell segments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/202610_DataSheet_Zeus_32_285Wp-ee60c70ab849.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Hotter, lighter, -5 yr warranty | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Hotter, lighter, -5 yr warranty | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Lighter | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | +45 W, hotter, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | +45 W, hotter, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter | | [Gamko New Energy GKA182M240W](https://comparepv.com/panel/gamko-new-energy-gka182m240w) | 240 W | -45 W, lighter | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | -25 W, lighter | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -15 W, lighter | | [DMEGC DM270M10T-B32HBT](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-dm270m10t-b32hbt) | 270 W | -15 W, hotter, -0.2 pp | | [Heckert Solar ZEUS 1.2 FullBlack 275W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-275w) | 275 W | -10 W, lighter, -0.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.