Everyone, My organization is in a growth phase right now and within the next year will find ourselves having outgrown our current 16KVa Symmetra. We have comissioned an electrical engineer to make a recommendation as to what is required to install a new 130Kva Liebert nPower UPS along with a generator. Our current plan is to purchase the UPS with a minimal amount of battery, approximately 15min worth; just enough to get the generator running. Is this the better way to go? Or should we consider more battery? What is everyone's experience with the Liebert line of products? Any kudos or gripes? Our electrical engineer also recommended that we purchase a Generac generator and transfer switch. Any experiences with that company? He also is strongly opposed to us purchasing a natural gas generator which seemed like a shoe-in for us. We have natual gas facilities and didn't want to hassel with the diesel maintenance problems. Is a natual gas generator something that we should consider? Additionally he recommneded that we place the HVAC and lighting upstream from the UPS and use some sort of junction box to supply both the UPS load and the HVAC. How do you "big guys" do it? Here is a link to the diagram that he gave us today. Your thoughts are appreciated! http://www.shastalink.k12.ca.us/nanog/nanog.jpg Dan Lockwood Microsoft Certified Professional CompTIA Network+ Certified Cisco Certified Network Associate