My Eko 40 and 500 gallons of pressuirized storage is completed and works as intended. I have been waiting for some lower temps to do a test run and last night it got into the 40s so I decided to go ahead and see if all my work for the last 6 months paid off. The Eko fired up and entered gasification mode without problems. Storage got up to 160 from 65 degrees. Im happy with the results. Now I need to change gears and think about how I am going to protect the boiler in a power failure. My boiler is in an outbuilding. I would need to power the EKO controller and Taco 011 pump long enough to prevent the boiler from overheating. I want to use a pure sine wave UPS to do this. Can I buy one off the shelf to provide enough battery life or will I need to add external batteries? Can you add extra batteries to any UPS easily? I don't know much about UPSs so I'm hoping someone can point me in the right direction.