Reefer Madness

The icebox is 7 cubic feet, with an average of over 4" of insulation 6" sides, 8" bottom, and 2" top (I may go to 3" top).

I figure on ~3000 BTU loss/day with light use (not opened very much)

The engine driven cold plates are about 1700 BTUs, so they should last over 12 hours.

Used alone, a 12 V system should use about 60 amp/hours/day. (Just 2.5 amps average! good insulation pays)

used together, dare I say it, the electrical demand could be as low as 25 amp hours/day running the engine once/day.

Measurements using control panel ammeter

Bow lights .25 Amps
Running light 1 Amp
Interior lights 2 cabins well lit 4 Amps
Radar and GPS 1 amp standby, 1.2 transmit (ood, this shoud be measured again)
Autopilot standby 0 amps
stereo 0 amps
VHF listen 0 amps
mastlight .01 amps
Spreaders 1 amp