Looks like a very neat installation Rod, good to see those ‘fat’ cables!
Going to lithium are you planning on fitting a bigger inverter? With a 1000w unit you will only be able to use a VERY small toaster or VERY small electric jug & NOT together! But then you may only want to run a CPAP machine which that inverter will do with ease.
Sorry to rain on your parade.
Cheers
Tony