New Refrigeration System Plan

[skipmac]

Read all the books, articles and tests and this is what I have come up with.

1. System design

Total box 7.5-8 cu ft, spillover system with
1.5 freezer
6 - 6.5 refrigerator
Top loading
min 4" Dow blue board insulation, 6" around the freezer
Frigoboat Capri 35F compressor
200F evaporator
Guardian thermostat and compressor speed control

2. System usage profile

Full time liveaboard.
Worst case scenario, 4 on board, spring or fall in the tropics.
Power: wind gen, solar panels, Honda 2000 gennie, 100 amp alternator with smart regulator, 600 amp hours of battery.

Estimate 6000 - 6500 BTU/day

So, the questions.

1. Does the capacity of the system as planned seem adequate for the planned use?

2. Would the Frigoboat keel cooler be recommended in addition to or instead of the air cooled system. Frigoboat tells me the keel cooler and air cooled units can be installed in series and the fan turned for higher efficiency.

3. Anything new in insulation better than the Dow polystyrene?

4. I have read that after 4" of insulation you start reaching diminishing returns. Would you agree or should I go for 5" or 6"

5. Any recommendations on the thermostat?