S4 Manufacturing is a developer and producer of innovative energy storage and peak systems. This newest innovative flywheel technology is called Kinext. In the modern world, electrical networks are constantly interrupted by peaks and troughs. These deviations cause damage and disrupt a clean and stable electrical service. Our team has designed and manufactured a flywheel system of 1 ton with a diameter of 3 meters and with a speed on the outer edge of 1,500 km / hour. The size and precision required to achieve this technical performance was extremely worthwhile. One flywheel can switch 1 megawatt of power on and off in milliseconds. We have installed a fully operational multi-megawatt system of 5 megawatts on our site at our site in the Netherlands.