A hell of a lot more than you "know doubt". 12 yrs enough. Grow a brain!
Better off with a good pool pump on mains. Less problems. Unless you do the whole house with solar. PM me for quailty pool pump. I also have solar systems. Whole house. Have a new set up coming soon. 5 KW power saver. See attached. Prototype vid can be seen on F/Book search for Hybrid Solar 1st ten are going to Australia!