--- title: "Heckert Solar ZEUS 1.1-445 445W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar ZEUS 1.1-445 445W solar panel. Specs: 22.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-zeus-1-1-445" updated: 2026-09-11 --- # Heckert Solar ZEUS 1.1-445 Strong in heat, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** ZEUS 1.1-445 - **Series:** ZEUS 1.1 Transparent - **Rated power:** 445 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 445 W | 435 W | Strong - top 8% | | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 4% | 1,309 | | Weight (kg) | 23.7 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.7 | 220.2 | Typical | 5,302 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 4% | 1,309 | | Weight per kWp | 53.3 | 51.4 | Typical | 7,098 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 4% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 1,309th in the whole database. - **22.30% module efficiency** - Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **Best for:** Agrivoltaic, residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 22.30 % - **Voltage at Pmax (Vmp):** 29.93 V - **Current at Pmax (Imp):** 14.87 A - **Open-circuit voltage (Voc):** 35.55 V - **Short-circuit current (Isc):** 15.92 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:** 222.7 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:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5100 of 14005 | | Power density | 5302 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 7098 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-Type TOPCon cells with 96 half-cut** - N-Type TOPCon technology combined with 96 half-cut cells reduces resistive losses and delivers a -0.28%/°C temperature coefficient, translating into higher energy yield in hot climates compared to older PERC modules. - **Bifacial glass-glass construction, 2 mm** - Dual-sided 2 mm tempered glass on front and rear captures light reflected off the ground, boosting energy yield without increasing the installation footprint, while also improving the module's mechanical durability. - **30-year product and power warranty** - The manufacturer backs the series with a 30-year warranty on both the product and power output — longer than the standard 25 years offered by many Tier-1 manufacturers, which meaningfully lowers LCOE over the system's lifetime. - **High load and corrosion resistance** - The panel withstands snow loads up to 8,100 Pa and wind loads up to 2,400 Pa, and the glass-glass construction resists ammonia, salt mist, sand, dust, and PID — making it well suited for agricultural and coastal installations. - **German manufacturer with 30+ years of experience** - Heckert Solar has operated since 1992 and is headquartered in Germany, with local European manufacturing that reduces supply-chain risk compared to some Asian competitors. ## Cons - **Efficiency below top-tier peers** - Maximum efficiency of 22.5% trails competing modules from SunKean and Sunket New Energy (SKT430~450M10-108D5), which reach 23.04% at the same 450 Wp power rating — a roughly 0.5 pp gap that may matter on roof-space-constrained installations. ## About this series The ZEUS 1.1 Transparent series from Heckert Solar is a module built for installations meant to capture every ray of light reaching the roof or facade. It combines **N-Type TOPCon technology** with a **bifacial glass-glass construction**, allowing the panel to absorb irradiance from both the front and rear sides, boosting energy yield without expanding the footprint of the array. The use of **96 half-cut cells** reduces resistive losses and improves module performance under partial shading, which matters for unconventional roof geometries or ground-mount installations. The transparent rear layer not only enhances aesthetics - the black frame and uniform look suit design-conscious projects - but also enables efficient capture of light reflected off the underlying surface. The glass-glass build delivers strong **resistance to ammonia and salt-mist corrosion** as well as hail loads, making it a solid choice for agricultural sites and coastal locations. The manufacturer backs the series with a **30-year warranty** covering both the product and power output, translating into a lower LCOE over the system's lifetime. It's a fitting solution for investors seeking durability and maximum output per square meter of roof. ## Notable figures - Efficiency of 22.3% matches the \*\*TOPCon 400-450W\*\* median - At 222.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.28%/°C matches the \*\*TOPCon 400-450W\*\* median - At 23.7 kg (1.7 kg above \*\*TOPCon 400-450W\*\* median of 22.0 kg), requires checking roof load capacity - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What's the difference between the ZEUS 1.1 Transparent bifacial panel and a standard monofacial module? The bifacial design uses a transparent glass rear layer instead of a standard backsheet, allowing the module to capture sunlight reflected from the ground, roof, or facade on its rear side as well. This delivers an additional energy yield, especially over light-colored surfaces, without increasing the number of panels in the array. ### Is the Heckert Solar ZEUS 1.1 Transparent suitable for farm buildings or coastal installations? Yes, the glass-glass construction offers high resistance to ammonia and salt mist corrosion, making this series a good fit for livestock buildings and coastal locations, where standard backsheet panels degrade faster. The module also handles hail loads well, adding further durability. ### What warranty does the ZEUS 1.1 Transparent series come with, and what does it cover? Heckert Solar backs the ZEUS 1.1 Transparent series with a 30-year warranty on both the product and power output. This provides long-term investment protection and a lower levelized cost of energy over the system's lifetime compared to panels with a standard 12-15 year warranty. ### What is N-Type TOPCon technology, and how does it differ from PERC panels? TOPCon (Tunnel Oxide Passivated Contact) is an N-Type cell technology offering higher efficiency and lower degradation over time than older P-Type PERC cells. In the ZEUS 1.1 Transparent, this translates to up to 450 Wp per panel and more stable performance at high temperatures, important for roofs with poor ventilation in summer. ### Does the 96 half-cut cell layout in the ZEUS 1.1 Transparent matter for partially shaded roofs? Yes, splitting the module into 96 smaller half-cut cells reduces resistive losses, so shading on part of the panel, from a chimney or antenna, has less impact on the entire module's output. This is particularly useful for irregular roof geometries or ground-mount installations with partial shading. ### Is the ZEUS 1.1 Transparent a good choice for facade installations from a design standpoint? Yes, the uniform black frame and transparent rear layer give the module a clean, consistent look, making the series popular for BIPV projects and installations where aesthetics matter, such as facades or canopies. The transparency also allows light to pass through the structure. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datenblatt_Zeus-11_445-450Wp_2mm_web-007939e22abf.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +50 W, lighter, +2.5 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +45 W, lighter, +2.2 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +45 W, lighter, +2.2 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +40 W, lighter, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +40 W, lighter, +2.0 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +40 W, lighter, +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 | Lighter, -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +60 W, cooler, +2.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +55 W, cooler, +2.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +55 W, lighter, +2.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-zeus-1-1-445 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.