Macnica Begins Sales of Challenergy’s Small Wind Turbines
September 26, 2025
On September 18, Macnica (Yokohama City) announced that it has signed an exclusive distribution agreement with Challenergy (Sumida Ward, Tokyo), a small-wind joint venture, to sell a new type of vertical-axis Savonius wind power generation system that can also serve as an emergency power source during disasters.
Savonius wind turbines are classified as drag-type turbines that generate rotational force through pressure, regardless of wind direction. Their bladeless structure allows them to withstand strong winds and operate quietly. The newly applied Savonius turbine adopts a unique shape that minimizes the risk of breakage or runaway spinning, even under strong winds such as typhoons.
The rated power output is 100 W (at 11 m/s wind speed), and the maximum output is 250 W (at 14.5 m/s wind speed). The noise level is 49 dB (measured at 1 meter from the turbine at 7 m/s wind speed). Power generation begins at wind speeds of 3 m/s and continues up to 14.5 m/s, withstanding wind speeds of up to 40 m/s. The device dimensions are 0.7 m in diameter and 1.5 m in height.
In addition to the wind turbines, the system will be equipped with solar panels with a capacity of 100–200 kW and a storage battery system with a capacity of 2–3 kWh (capacity and output vary depending on specifications). The electricity generated by the wind turbines and solar panels is stored in the battery and drawn when needed.
The two companies plan to continue developing additional IoT-based services, including remote management functions, with the goal of selling around 300 units within the next three to five years.
