I upgraded my old generator to a 5 kw with 7 kw surge. Installing a transfer switch as well. I want to put a duel fuel setup on it for gas and propane. My question is the size of the propane bottle. The longest ive been without power was 5 days. Im on a dead end street with 9 houses. If the fuse link on the pole feeding our street pops we are the absolute last to get power due to numbers if customers. Can any one tell me the size of the tank that would give me 5-6 days worth of gas assuming a 50-60% load? Also looking into getting natural gas to house but PECO usually wants you to change over appliances to gas for a pipeline install.