John,
How is it with both the refrigerator and freezer running (cycling) 24/7 that 170W of solar is able to also replace the battery power consumed each day by the other electrical equipment in your RV?
My propane refrigerator has never been an issue in our camping - a lot of which is in warm to hot desert settings. However, we do keep our RV very level at all times when parked for sleeping comfort ... maybe this is the key.
BTW, you made a great choice by having your RV batteries be AGM. We use a couple of paralled deep cycle AGMs in Group 29 size.