My 180 W solar panel has worked a treat putting in 4.9 Amp (especially where there has been sun).
My 2x 120Amp batteries dropped to 51% and over the day filled up to 74%.
On average I loose 10-30% running two 32L Engels, 1 as fridge (on 1 @ 4deg), the other as Freezer on 4 @ -10deg). All dependant on ambient temp.
Last night, 8 deg, Engels sucked 3%.
Other night 14 deg, 15%.
Overall we haven’t run out of fridge power between solar panel, driving car (especially the 5-7 hr trips) and staying on powered sites.
A second panel on top of the camper will definitely be another mod I need to do.
The Steca charge controller is fantastic (@$210 in Broome, you would want it to be.