--- title: "Heckert Solar ZEUS 1.1 450W Black Frame 450W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar ZEUS 1.1 450W Black Frame 450W solar panel. Specs: 22.50% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/heckert-solar-zeus-1-1-450w-black-frame" updated: 2026-09-11 --- # Heckert Solar ZEUS 1.1 450W Black Frame 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 450W Black Frame - **Series:** ZEUS 1.1 (445–450Wp) Black Frame - **Rated power:** 450 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) | 450 W | 465 W | Weak - bottom 9% | | | Module efficiency | 22.50% | 22.52% | Typical | 4,222 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight (kg) | 20.9 kg | 24.0 kg | Strong - top 17% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 22.52% | Typical | 4,222 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight per kWp | 46.4 | 52.2 | Strong - top 17% | 1,162 | | 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. - **46.4 kg per kWp** - Top 17% of the TOPCon 450-500 W segment, against a median of 52.2. - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 30.19 V - **Current at Pmax (Imp):** 14.91 A - **Open-circuit voltage (Voc):** 35.75 V - **Short-circuit current (Isc):** 15.95 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:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 96 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.9 kg - **Area:** 2.00 m2 - **Power density:** 225.2 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:** 382 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 4225 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 1162 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Exceptionally Favorable Temperature Coefficient** - A temperature coefficient of -0.28%/°C places the ZEUS 1.1 among the top performers in its segment — for reference, standard PERC modules typically achieve -0.34 to -0.36%/°C. At a typical summer cell temperature of 65°C, the module loses approximately 11.2% of its rated power, compared to approximately 14.4% for PERC, which translates to measurably higher annual energy yield under Polish climatic conditions. - **Bifacial Design Combined with Glass-Glass Construction** - The Glass-Glass construction with n-type TOPCon cells enables energy harvesting from the rear side (the manufacturer claims up to 25% additional yield with suitable ground albedo). Dual 2.0 mm tempered glass panes on both sides eliminate the risk of microcracks and moisture ingress, extending the practical service life beyond the standard 25 years. - **Class A Fire Rating (IEC 61730)** - The series carries a Class A fire resistance rating per IEC 61730 — the highest classification available — which is required for pitched-roof installations near other buildings in many EU municipalities. The peer-comparable Suntech Ultra V Pro Mini (monofacial, glass-glass) in this power class does not always explicitly declare a Class A rating. - **30-Year Product and Power Output Warranty** - Heckert Solar guarantees performance above 87.4% of nominal power after 30 years — the same time horizon covers both the product warranty and the linear power output warranty. Most Chinese Tier-1 manufacturers (JA Solar, LONGi) offer 25-year power warranties with degradation to approximately 84.8%. - **The Only Active PV Manufacturer in Germany** - Heckert Solar (est. 1992, Chemnitz) is the last PV module manufacturer maintaining continuous production in Germany — Solarwatt ceased production in Dresden in August 2024, and Meyer Burger in Freiberg in April 2024. The company has held the Top Brand PV certification uninterrupted since 2015, a relevant factor when assessing supplier risk in commercial installations. ## Cons - **Efficiency Below Best-in-Class** - The maximum module efficiency of the series is 22.5%, while the peer-comparable SunKean/Sunket SKT430–450M10-108D5 achieves 23.04% at the same 450 Wp power rating. The 0.54 percentage-point gap means that over the same roof area, the ZEUS 1.1 will generate approximately 2.3% less energy — a meaningful consideration where installation space is constrained. - **Higher Module Weight (Glass-Glass)** - At 23.7 kg, the module is approximately 2–3 kg heavier than typical glass-foil modules of equivalent power output. In large rooftop installations, this may require structural load verification or additional mounting hardware, adding cost and engineering time to the project. ## About this series The Heckert Solar ZEUS 1.1 (445-450Wp) with a black frame is a glass-glass module that combines high efficiency with a refined black frame aesthetic. The use of **n-type TOPCon monocrystalline** cells ensures stable performance in challenging conditions, as well as better utilization of radiation under variable sunlight. A key advantage of this series is **its bifacial design**, which allows the module to generate energy from both sides - a real benefit for roofs, ground-mounted installations, and areas with light reflection. In practice, the ZEUS 1.1 helps to reduce energy losses in hot weather thanks to **its favorable temperature coefficient**, and the robust glass-glass construction increases resistance to microcracks and aging. For investors focused on long-term costs, the **long warranty period** is also important. This is a good choice for homes and businesses that want to maximize production from a limited area, without compromising on the appearance of the installation. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 450-500W\*\* median - Power density of 225.2 W/m² matches the \*\*TOPCon 450-500W\*\* median - Temperature coefficient of -0.28%/°C matches the \*\*TOPCon 450-500W\*\* median - At 20.9 kg, this panel is 3.1 kg lighter than \*\*TOPCon 450-500W\*\* median (24.0 kg) - easier handling during installation - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty does the Heckert Solar ZEUS 1.1 Black Frame carry and what does it cover? The ZEUS 1.1 Black Frame series comes with a 30-year product warranty and a 30-year power output warranty. The manufacturer guarantees at least 91.70% of nominal power after 15 years and at least 84.95% after a full 30 years of operation. This is one of the longest warranties available in the residential and commercial PV module segment and significantly reduces long-term investment risk. ### How does the ZEUS 1.1 450Wp perform in summer heat and what is its temperature coefficient? The ZEUS 1.1 handles high temperatures better than older PERC technology. The temperature coefficient of Pmax is -0.28%/°C, meaning lower power losses on a hot rooftop compared to the typical -0.34% to -0.40%/°C range for PERC cells. The n-type TOPCon architecture reduces carrier recombination, maintaining more stable output throughout hot summer afternoons. ### What does bifacial construction mean in the ZEUS 1.1 and how much extra energy can realistically be gained? A bifacial module has active cells on both glass surfaces, so reflected light from the roof, ground, or nearby surfaces is converted into electricity. For the ZEUS 1.1, the manufacturer claims up to 25% additional yield compared to a monofacial equivalent. The gain is most pronounced on highly reflective substrates such as white gravel, light-colored membranes, snow cover, or ground-mounted systems on sandy terrain. ### Can the ZEUS 1.1 Black Frame handle heavy snow loads typical of Central European winters? Yes. The glass-glass construction with dual 2 mm tempered glass provides exceptional mechanical strength. The module is rated for snow loads up to 8,100 Pa and wind loads up to 2,400 Pa, comfortably exceeding Central European climate standards. The glass-glass design also offers significantly better resistance to microcracks compared to conventional modules with a polymer backsheet. ### What efficiency does the Heckert Solar ZEUS 1.1 450Wp achieve and how does TOPCon differ from PERC cells? The 450Wp variant reaches module efficiency of up to 22.5%, placing it at the upper end of the premium segment. TOPCon (Tunnel Oxide Passivated Contact) technology uses an n-type silicon base with a thin tunnel oxide passivation layer that minimizes carrier recombination under both full irradiance and diffuse light conditions. In practice this translates to higher annual energy yield compared to a PERC module of the same rated power. ### How heavy is the ZEUS 1.1 Black Frame panel and will a standard roof structure support it? The ZEUS 1.1 Black Frame weighs 20.9 kg with dimensions of 1762×1134×30 mm. This is a standard weight for a 96-cell glass-glass module and does not require structural reinforcement on typical new or well-maintained roofs. A consultation with the installer or a structural engineer is still recommended for older buildings or roofs already loaded with heavy roof tiles. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datenblatt-Zeus-11-445-450Wp-2mm-EN-web-fce477392fef.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +45 W, cooler, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +40 W, cooler, +2.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +2.0 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +2.0 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, heavier, +2.0 pp | | [Heckert Solar ZEUS 1.1 440WP Full Black](https://comparepv.com/panel/heckert-solar-zeus-1-1-440wp-full-black) | 440 W | -10 W, -0.5 pp | | [Heckert Solar ZEUS 1.1 445W Black Frame](https://comparepv.com/panel/heckert-solar-zeus-1-1-445w-black-frame) | 445 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +60 W, cooler, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-1-1-450w-black-frame Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.