Hi there. You seem to be expert in batterys and the like. I run a food truck and need at least 4.5 kw of power for 3 to 4 hours a day. Any idea how many 12 v batterys I woiuld need to power my truck equipment ( micrioewaves, air fryer, fridge hot box etc. What type of battery to go for ? Any help would be appriciated Tommy.