This Dantherm DBX5000 5kW Hydrogen Fuel Cell Battery Extender / Backup has a model number of 4000710. According to the manufacturer who is based out of Denmark this Hydrogen fuel cell battery backup system was manufactured in the first half of 2011 for a US based customer. It is dual voltage and will work with a wide range of voltages and 50 or 60 Hz. It appears to be unused as the connection cables are still tied together. This system came from a large cellular phone service provider based out of Southern California who closed operations towards the end of 2013. Dantherm does still make this system but its being made under a slightly different model number.
Power output: 5000W, -52V DC H2 Consumption at MAX power: 67 I/min VAC input: 90-267V, AC / 50-60Hz Fuel supply pressure: 0.43 Barg Hydrogen purity: grade 3.5 Unit dimensions: 48 Wide x 21 Long x 87 Tall .