Think about capacity. 200A-hr at 12V is 2400W-hr. That is what is available from one regular household outlet. Sum up what you're running 24/7 and consider that you only get to charge during daylight. I run the Engel around the clock when we lose power, which consumes around 50W-hr when set to freeze. It runs pretty continuously. That along with a radio on receive is about 65W-hr and I will draw down my 100A-hr battery in about 15 to 18 hours. I put 240W-hr back into the system with my solar panel and can run continuously unless we get more than one day of continuous overcast.
'91 Pickup - Imelda
'08 Tacoma TRD
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche