The EPI platform merry-go-round allows many children to ride while a few take turns pushing. The generation trains starts with a hub bearing to which the entire deck of the merry-go-round is attached. A drive shaft from the hub connects to a helical gearbox operating as a speed-increaser. The high-speed output shaft then turns a permanent rare earth magnet windmill generator. The efficiency of this generator is over 70%. The electricity generated by the merry-go-round and all the other play equipment the EPI system is carried by underground wires to a power enclosure, created by Goal Zero, where it is converted to a direct current and used to charge a large AGM deep cycle battery (much like those found in golf carts). In the enclosure, a state-of-the-art MPPT (maximum power point tracking) power controller effectively manages the charging and the discharging of the storage batteries, protecting against drainage and ensuring long battery life.
Tough Light, an EPI sponsor, has developed and currently supplies the “smart” LED lanterns purchased and used in EPI systems. The lantern has 400 Super Bright Lumens with a Premium 6000mAh Li-ion battery and lasts for16.6 nights of light from a single charge (200 HRS on LOW Setting). Military-grade rubber and plastic molds with built in rubber O-rings, provides IPX-6 water resistance to handle wet conditions. This Tough Light is durable and can handle a drop from 5 feet with no damage. You can donate one of these amazing lanterns here!
A solar panel is also connected to the power enclosure for educational purposes and to prevent battery purposes and to prevent battery discharging during school breaks. The CIGS (Copper Indium Gallium Selenide) solar panel provides additional system energy when school is in session.