Simon, we have a couple of sets of cloth beer
mats from e bay which we alternate every 3 or 4 days although a small towel would do. They absorb all the condensation
and keep the fridge dry and add to the insulation
at the bottom. You could try one on top with a space for the often used stuff like milk if you are English
and drink lots of tea.
Might be a bit tricky in Spain
but we added two layers of that house hold radiator foil backing polystrene stuff and taped the edges. There wasn't really room to add anything thicker but I am sure it made a difference. Also added a vent in the cupboard to increase air flow.
During the last two weeks in Dartmouth it has been 30.c and the fridge (danfloss air cooled) coped well, running for a minute every 15 or so.
monitors are essential in my view to see what is going on. Before we would charge using the engine
genny for hours but didn't really know what was happening. Now with 180w of solar
and monitoring the batteries we only use 20% of the battery capacity with fridge, lap tops and tv etc.
Nice blog btw, love all the photos