I think you could store them in your shed as long as there is not an open flame heat source around. The reason we don’t store ours in my dh shed is no room. I like the thirty gallon tanks, I feel they are the better buy and I have a couple thirty gallons tanks and a couple twenty gallon ones and they are stored behind the shed at the farmhouse. I know I need so many more of them when we get moved in the farmhouse for that just in case situation.
The homestead has a one hundred fifty gallon propane tank that will need filling before we move in and that will be about two hundred fifty dollars, just have to find that extra money because diapers, wipes, formula, and baby food for an entire month for this baby has to come first, so will see how things go next month and if we get to move or not.
Thanks