no expert at all, din my 250 watt install myself I use a house type 250 watt panel 35 volt and a MPPT charge controller with a separate read out works great at times puts out 15 amps batteries are always fully charged and I do not keep it plugged in to house power anymore. I have to 6volt deep cell batteries would like more but no room cost something around $400 a couple of years back. my roof is curved where I had to mount in so I put down two lengths of uni strut and attached the panel on top of the uni strut, the solar panel dealer had some really nice hold down for uni strut like they use for houses. Four holes in the roof with stainless steel screws and sealant.