--- title: "Heckert Solar ZEUS 1.1-455 455W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar ZEUS 1.1-455 455W solar panel. Specs: 22.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-zeus-1-1-455" updated: 2026-09-11 --- # Heckert Solar ZEUS 1.1-455 Strong in heat, no clear weak spot 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** ZEUS 1.1-455 - **Series:** ZEUS 1.1 White grid - **Rated power:** 455 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 455 W | 465 W | Typical | | | Module efficiency | 22.80% | 22.52% | Typical | 2,714 | | Power density | 227.7 | 225.2 | Typical | 2,888 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight (kg) | 23.7 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.80% | 22.52% | Typical | 2,714 | | Power density | 227.7 | 225.2 | Typical | 2,888 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight per kWp | 52.1 | 52.2 | Typical | 5,533 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 11% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 455 W - **Efficiency:** 22.80 % - **Voltage at Pmax (Vmp):** 30.44 V - **Current at Pmax (Imp):** 14.95 A - **Open-circuit voltage (Voc):** 35.95 V - **Short-circuit current (Isc):** 15.98 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 96 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.7 kg - **Area:** 2.00 m2 - **Power density:** 227.7 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:** 387 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2714 of 14005 | | Power density | 2888 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 5533 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-Type TOPCon with low degradation** - 96 monocrystalline G12R half-cells in N-Type TOPCon technology deliver a Pmax temperature coefficient of -0.28%/°C and lower LID/LeTID degradation than conventional P-Type PERC cells, resulting in more stable energy yield in hot climates and under partial shading. - **Bifacial glass-glass construction** - Dual-sided cell activity captures light reflected from the mounting surface, boosting potential energy yield depending on ground albedo, without any additional intrusion on roof surface area. - **30-year product and power warranty** - Heckert Solar guarantees roughly 84.95% of initial power retention after 30 years, with both product and performance warranty spanning the same period - longer than the standard 25-year terms offered by many Tier-1 competitors. - **Efficiency competitive against peers** - Efficiency of 22.5-22.8% is on par with LEDVANCE M435~455N54LB-SF-F7 (22.77%) and Sunlike SKT420~455M10-108D6 (22.8%), and clearly above Solitek SOLRIF D series Black (22.56%). - **Elegant white-grid design for visible roofs** - The uniform, light-colored surface without typical dark inter-cell connections suits architecturally demanding projects, visible rooftops, and facades where installation aesthetics matter to the investor. ## Cons - **Higher production cost from Germany** - Manufacturing in Germany (Heckert Solar has been headquartered there since 1992) involves higher labor and energy costs than Asian Tier-1 factories, which typically translates into a higher list price for comparable electrical specs. - **Limited field track record for this series** - The ZEUS 1.1 White Grid series launched in 2025, so despite the manufacturer's long history, multi-year field performance data confirming the claimed 30-year degradation curve is not yet available. - **Heavier glass-glass build** - The dual tempered-glass layup at roughly 30 mm module thickness increases panel weight versus standard glass-backsheet designs, which may require checking mounting structure load capacity, especially when retrofitting existing roofs. ## About this series The ZEUS 1.1 White Grid series is a German-engineered line of photovoltaic modules built for installations where both performance and roof aesthetics matter. Its signature **white grid** design replaces the typical dark cell interconnections, giving the panel a uniform, elegant appearance that fits perfectly on visible roof sections, facades, and architecturally demanding projects. At the core of the module lies **N-Type TOPCon technology** based on 96 monocrystalline G12R half-cut cells, delivering better performance at higher temperatures and more stable output under partial shading compared to conventional P-Type cells. Another key advantage is the **bifacial glass-glass construction**, which captures light reflected from the ground to boost energy yield without changing the roof footprint. The panels also stand out for their **high mechanical resistance**, thanks to tempered anti-reflective glass, ensuring durability under demanding weather conditions such as heavy snow loads and strong wind. The series is aimed at both residential and commercial investors seeking a modern-looking installation without compromising on reliability, backed by a **30-year manufacturer warranty** covering both product and performance. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*TOPCon 450-500W\*\* modules - At 227.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 450-500W\*\* panels - At -0.28%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - Ranked #2714 out of 14005 panels for efficiency in the database ## Questions ### How does the white grid in Heckert Solar ZEUS 1.1 White Grid panels differ from standard black-ribbon modules? Standard panels use dark soldering ribbons to connect cells, creating a visible dark grid pattern on the surface. The ZEUS 1.1 White Grid series uses white interconnect ribbons instead, giving the module a more uniform, elegant appearance without any loss of power or efficiency. This is especially valued by installers and homeowners who care about the visual appearance of panels on exposed roof sections. ### What advantage does N-Type TOPCon technology offer in the ZEUS 1.1 White Grid series compared to standard P-Type cells? N-Type TOPCon cells have a lower temperature coefficient, meaning less power loss when the panel gets hot during summer operation. They also handle partial shading better and degrade more slowly over time than classic P-Type PERC cells, resulting in more stable energy yield throughout the system's operating life. ### Is it worth paying extra for bifacial panels in the ZEUS 1.1 White Grid series on a standard pitched roof installation? On a typical pitched roof, where the panel sits close to the roof surface, the gain from bifaciality is limited since the rear side has little access to reflected light. However, the glass-glass construction still provides higher mechanical durability and better moisture resistance than standard glass-backsheet panels, so the investment remains worthwhile regardless of mounting angle or surface type. ### What is the maximum power output of Heckert Solar ZEUS 1.1 White Grid panels, and how many modules are needed for a 10 kWp system? Panels in the ZEUS 1.1 White Grid series reach a maximum power output of up to 455 Wp. To achieve a 10 kWp system, roughly 22 modules would be needed, though the exact number depends on the specific power bin from the production batch as well as available roof area and inverter sizing. ### What warranty applies to ZEUS 1.1 White Grid panels, and what exactly does it cover? Heckert Solar offers a 30-year warranty covering both the product and its power output. The product warranty covers material and workmanship defects, while the performance warranty guarantees the module maintains a specified power output level throughout the full period, exceeding the industry standard of typically 25 years. ### Are ZEUS 1.1 White Grid panels from Heckert Solar actually manufactured in Germany? Heckert Solar is a German manufacturer headquartered in Chemnitz with a long history in the photovoltaic industry. The ZEUS 1.1 White Grid series is engineered and developed under the German brand following European quality control standards, which is a key factor for many buyers when choosing a module supplier. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DataSheet_Zeus_11_white_grid_450-455Wp_EN_web-95f7c9d30982.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +40 W, lighter, +2.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +50 W, cooler, +1.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +35 W, lighter, +1.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +45 W, cooler, +1.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +45 W, lighter, +1.7 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +45 W, lighter, +1.7 pp | | [Heckert Solar ZEUS 1.1 440WP Full Black](https://comparepv.com/panel/heckert-solar-zeus-1-1-440wp-full-black) | 440 W | -15 W, lighter, -0.8 pp | | [Heckert Solar ZEUS 1.1 445W Black Frame](https://comparepv.com/panel/heckert-solar-zeus-1-1-445w-black-frame) | 445 W | -10 W, lighter, -0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-1-1-455 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.