Proton Motor’s Cube Outdoor Emergency Backup fuel cell solution is built for real-world applications, from railway infrastructure, telecoms or radio stations, critical infrastructure backup, to data centres and beyond. Choose the nominal power rating that suits your application, from 4kW to 8kW and more, at 230V AC 50Hz output. This solution is built using Proton’s own PM 200 Stack Module fuel cell, which is capable of freeze start and operating in temperatures right down to -40C. Fuel cell and electronics are wrapped in a secure and unassuming case for long-term outdoor use.