Hello, I am retired and want to look at building a “ Tesla Power Wall “ or similar. I have a 4kwh solar panel system which feeders into the mains. Always been a DIY er and can turn my hand to most things. This being my latest project so looking for how it all works and best way to set it up hence joining this forum. Forgot to say I live in South West Scotland in a small village called Eastriggs. Not far from the World Famous Gretna Green.Thank you.