Middle of its segment, weak in heat
The Mars Half Cell series is built for installers and investors who need strong energy performance from a limited roof area. These modules rely on half-cut cell technology based on monocrystalline PERC cells, which cuts resistive losses and boosts energy yield compared to conventional full-cell panels. Splitting each cell in half means lower operating currents, resulting in reduced module heating and better performance under partial shading - a single scratch or leaf no longer knocks out an entire section of production. The multi-busbar design further lowers the risk of microcracks and improves long-term reliability. Mars series panels feature a robust, weather-resistant frame and a glass surface engineered to withstand hail impact and heavy snow loads, making them a versatile choice for both residential rooftop installations and larger commercial systems. This is a series for customers looking for a proven balance of consistent performance, durability, and reasonable cost, without paying a premium for bifacial or TOPCon technology.
Ranking
Signals from the data
Residential, commercial and shaded-installations.
Hot climates.
Bottom 16% of the PERC 350-400 W segment, against a median of -0.350.
Splitting PERC cells in half lowers operating current and resistive losses, while the multi-busbar grid reduces microcrack risk - a well-established combination for reliable mass-market series, without the premium of bifacial technology.
The upper efficiency bound of 20.9% exceeds VDS-S120/M6H (20.8%), Gamko GKA166M120 (20.85%) and Heckert NeMo 3.0 120M (20%) at the same 360-380 Wp power range, making this series one of the more efficient options in its technology class.
CSUN has operated since 2004 and has historically held Tier-1 status in the Bloomberg New Energy Finance ranking, indicating documented bankability - an important factor for financing commercial installations.
A robust frame and glass with enhanced hail and snow-load resistance allow the series to serve both residential rooftop installations and larger commercial systems without needing specialized variants.
Launched in 2021 and still actively manufactured (discontinued: false), the series provides confidence in long-term availability of spare parts, service support, and compatible mounting components.
The standard 10-year product warranty is now a baseline figure in the segment - many Tier-1 manufacturers (particularly with TOPCon lineups) already offer 12-15 years, making Mars Series relatively conservative on this point.
PERC has largely hit its technical efficiency ceiling (~21-23% at best implementations), while newer N-type TOPCon/HJT modules entering the market in 2026 offer lower LID/LeTID degradation and better high-temperature performance - the lack of such an option limits this series' long-term competitiveness against the latest offerings.
The series does not offer a bifacial option, so ground-mount installations or light-colored surfaces cannot capture additional albedo-driven yield available from competitors offering bifacial modules in the same power segment.
- Efficiency of 19.8% matches the PERC 0-400W median
- At 197.6 W/m² power density, this panel generates 3.2 W/m² more per unit area than PERC 0-400W median (194.4 W/m²)
- Temperature coefficient of -0.37%/°C matches the PERC 0-400W median
- At 19.5 kg, weight matches the PERC 0-400W median
- #12416 for efficiency, #13081 for temperature performance out of 14005 panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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