Well done - I have a similar plan for December / Jan (as a back-up) each year mainly, as a top-up for my ESS (I have all the bits, just not tried it as a fully working system todate), and certainly dont want to take that much out of the car - what are you powering from the car? (I have a VE Multiplus II GX & Pylontech batteries - but only have 1 AC-IN, so am thinking of a dual supply transfer switch - can you confirm that you need a 1w 470ohm resistor accross CP & PP on the type 2 plug to enable V2L)