Speak with your electrician and this person should know this or find a different electrician. I am running a 15 amp breaker for my total system, much more. For example I run a commercial food truck with more demand then your system will ever use at 8700 kw with a 30 amp breaker. This is the key to find out what your equipment is drawing. Your system will most likely will be drawing 10 amps at the maximum draw and that is a lot of amps, about 5200 kw. My system at it high pulls about 4 amps total with all the equipment. With the size of your tank I would estimate that you would have a max of 11 amps and a 20 breaker would be more than enough and branching off with circuts/ aka plugs and make sure that a GFI is in place some were in the line . The other thing to consider is wire. Make sure that you run a 12/3 ground solid wire to carry the load. If you really want to kick up the have the electrician wire with 10/3 and if you have breaker issues the you can switch to a 30 amp break with can carry 10.5 kw. Rev it is all about the load on the line, and what the breaker can take. Now if you have a pump the is 220, the you will have to run 12/4 or 10/4 based on the load 12/4 and 10/4 will be stranded.