Efficiency leader, no clear weak spot
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.
Ranking
Signals from the data
Residential and shaded-installations.
Top 1% of the 185-385 W band, against a median of 18.88%. Ranked 1,554th in the whole database.
Top 1% of the 185-385 W band, against a median of 188.2. Ranked 1,664th in the whole database.
Top 3% of the 185-385 W band, against a median of -0.360. Ranked 515th in the whole database.
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 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).
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.
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.
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.
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.
- 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
Specifications
Datasheet charts
Measured curves published by Heckert Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 285 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 1 panel of the same or similar size to this one, within ±10 mm. See them here Found 1 panel of the same or similar size to this one, within ±25 mm. See them here Found 32 panels of the same or similar size to this one, within ±50 mm. See them here Found 65 panels of the same or similar size to this one, within ±100 mm. See them here
About the ZEUS 3.2 series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.