Strong in heat, no clear weak spot
The ZEUS 2.1 series is a photovoltaic module line engineered for large ground-mount installations as well as commercial and industrial projects, where maximizing output per square meter is critical. The panels use n-type TOPCon (TNC 2.0) technology arranged in 132 half-cut cells, delivering high conversion efficiency and reduced power loss under partial shading. A defining feature of the series is its glass-glass construction combined with bifacial energy generation, allowing the module to capture additional kilowatt-hours from reflected light reaching the rear side, particularly beneficial on bright ground surfaces or in tracker-based systems. The aluminum frame and dual tempered glass layers provide strong mechanical durability along with resistance to ammonia corrosion and salt mist, making ZEUS 2.1 a solid choice for agricultural and coastal installations. The manufacturer backs the modules with a 30-year linear power warranty and low annual degradation, which meaningfully lowers LCOE over the system's operating lifetime. It's a fitting solution for investors and EPC contractors seeking stable, long-term returns from utility-scale solar farms.
Ranking
Signals from the data
Utility-scale, commercial and shaded-installations.
Top 7% of the TOPCon 600-650 W segment, against a median of -0.290. Ranked 1,347th in the whole database.
Top 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 777th in the whole database.
Top 10% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 749th in the whole database.
At 23.5-23.7% efficiency, ZEUS 2.1 outperforms comparable 640Wp modules - Luxen N5 (23.14%), Hanersun Hitouch 6N (23.3%), and REC Alpha Pro M (22.5%). This translates into higher energy yield per square meter of roof or ground area.
132 half-cut cells using N-type TOPCon (TNC 2.0) technology combined with a dual tempered-glass build reduce LID/LeTID degradation and improve the temperature coefficient compared to older PERC cells.
The glass-glass construction with a photovoltaically active rear side captures additional kilowatt-hours from reflected light - particularly valuable in ground-mount installations on high-albedo surfaces and tracker systems, where the annual yield uplift can reach several percent.
The 30-year power warranty exceeds the typical 25-year term offered by many tier-1 manufacturers, effectively lowering LCOE over the full operating life of a PV plant.
The frame plus dual tempered-glass build resists ammonia corrosion and salt mist, extending the series' suitability to agri-PV and coastal installations where standard aluminum frames degrade faster.
The 12-year product warranty is markedly shorter than the same series' 30-year power warranty - some premium manufacturers (e.g. REC) now align both terms at 25-30 years, offering investors fuller coverage of mechanical/electrical risk across the plant's lifecycle.
Based on publicly available sources, Heckert Solar does not appear on the BloombergNEF Tier 1 list, unlike some large Asian competitors. For institutional investors and project finance banks, this may be an additional bankability criterion to verify before signing an EPC contract.
- At 23.5% efficiency, this panel is 0.7pp above typical TOPCon 600-650W modules (median: 22.8%)
- 235.1 W/m² power density - 7.4 W/m² more than TOPCon 600-650W median (227.7 W/m²), more power per roof area
- At -0.28%/°C, hot weather performance is typical for TOPCon 600-650W panels
- 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
- #749 for efficiency, #1347 for temperature performance out of 14129 panels
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 635 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 1144 panels of the same or similar size to this one, within ±10 mm. See them here Found 1150 panels of the same or similar size to this one, within ±25 mm. See them here Found 1261 panels of the same or similar size to this one, within ±50 mm. See them here Found 1942 panels of the same or similar size to this one, within ±100 mm. See them here
About the ZEUS 2.1 series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.