I have a question about the sizing of my battery bank. I have a fish aquarium that I want to run off grid because of rolling power outages we might have in California. I was looking at using a MPP solar all in one inverter. I will be recharging the batteries with solar. I want to build a system that can run 24 hours and recharge itself in the winter time. I don’t need to go three days if there’s no sun. If I have to connect to the grid if the batteries get to low then the inverter will switch over automatically. In my location my peak sun hours in winter is average 3.42. I am planning on building the battery bank with lithium batteries. so I was wondering how many amp hours would I need to run my system in the winter time. I am giving you a break out how much wattage is my fish tank uses per hour. When I run the lights that’s when I use the most electricity and I run them between 2 PM and 10 PM every day. I figured daytime the solar would pretty much run the system and keep the batteries charged. Here is a break down by hour of usage.