I think I am going to land on the Grape Solar 400 watt with 40amp controller charger because of price and the fact that it's up-gradable to 500 watts.
My current battery bank is 340ah when I upgrade to 6v and 440ah I will add a extra panel
I am also looking at this 1500 watt pure sine wave inverter. I chose it because of one the price but second the remote monitor that lets you turn off the inverter from inside the trailer.
Other than that I don't know enough about inverters to choose.
https://www.amazon.com/EDECOA-Inverter-Display-Remote-Controller/dp/B085PQ1L3L/ref=sr_1_20?dchild=1&keywords=1500+watt+inverter+pure+sine+wave&qid=1611182869&sr=8-20