http://www.cleanenergyapps.com/en/site/our_news/5_kw_hydrogen_fuel_cell.html The system comprises a 5 kW PEM stack, two 3.000 Nlit Metal Hydride tanks, a 5 kW inverter with a 230 VAC, 50 Hz output, a microprocessor-based controller, and a tablet device for remote monitoring of system functions.