Fridge, new house fridge vs rebuild old rv fridge

We replaced our Dometic RM1350 with a Samsung RF18. We got tired of it being OK. We wanted frozen food and hard ice cream in the freezer. We do as the OP. No dry except a couple nights on a cross country trek to the family. We do this with a RV750ULHW inverter/charger and 2 Trojan105. Fridge stays cold and freezer frozen for over 8 hours, without shore hookup. The batts stay charged while driving. If needed, we could run the gennie for a couple hours. It works.