I've opted to go for a Renogy 2000W PSW
inverter at £176 first. I have until tomorrow to think about a lithium
battery. Then I will have to scour the posts about 'will my 200W panel and Epever MPPT regulator charge a 100AH lithium?" I don't know if the Epever will charge a lithium, and I haven't seen a setting for that in its instructions. I don't know if I want to add the cost of a new regulator to the exercise, just so I can make toast in a toaster instead of in the Ridge Monkey.