Battery recommendations for 1500W inverter

I measure my voltage drop at the batteries with the Trimetric monitor. That includes the wiring and batteries for cause of drop at any amps. Of course the actual voltage 'seen' at the inverter is less across the wiring, but the drop seen is the same, just from a lower starting point.

A few years ago, a member here (full_mosey) posted some good info on using his two AGMs and big loads. Good results. I am no good at searching the archives, sorry.