To have done it in the past, I find that is very hard to operate without power for the entire day. My house is surrounded by trees and the sun in the afternoon is at the back of the house and I do not get sun in the daycare area in the afternoon. I have an old farm house it's drafty and it gets cold really fast. I have a well so the power goes out there is NO water. I simply think it is hazardous if a child injures himself and I have no working phones or running water. My nearest neighbour is about a 5 minute walk .What if it happens on a day my cell phone dies ..You know Murphy !!
On top of that but not a real factor to my decision for this, I plan my menus and I am on a very tight budget right now. My first year was ruff ... haha So I don't always have a fall back plan for lunch. I may not have anything we can eat cold. Anyway different people, different situations but I think it my case, it absolutely makes sense to close for safety. I NEVER take risks.