Battery Backup

I just got off the phone with my APC rep. My boss is requiring a 2 hour backup window for equipment in our corporate office (2 racks worth of equipment). They are not interested in going with a generator, so I'm going to have find room for 1 UPS and 3 Battery cabinets. This will also require us to rewire our office to the new power grid. One more project to add to the list.