First, I am using the 50F compressors with smart speed controllers (SSC). What this does is adjust the speed of the compressor to compensate for loads. It generally has 5 speed ranges that it will go through in an attempt to optimize power consumption
. When power is applied to the box it starts off at the middle speed seting, then move up, or down depending on the thermal load in the box. Works great!
We are currently in North Carolina
, for several weeks the tempertures have been in the 90's. Abysmally hot!! The water temperature got up ot 92 at one point! I found it hard to believe, had to double check it. Yep, 92. For the most part after turning off the major devices, I saw 1-2 amps being drawn through amp meters. 90% of that had to be the refrigeration
. I still have meters, 3 Co monitors, propane
sensors, and bilge
sensors still pulling amperage. I suppose I could turn the refrig off and get a baseline use. I'll probably do that when I get back down to the boat next week. But in any case, I'd say my consumption
runs in the 1.5 amp per hour range. We also have Corel digital thermometers on both the refrig and freezer
. The box temperature goes up about 3 degrees when we open the box. It takes about 3 minutes or so to go back down to 38. Occassionally we see the box temperature creep up to 41, but it usually back down to 38 within an hour or so. The documentation
suggest that this is correct behavior. Anyway, it works REALLY well! I am very happy with it. Even though it was a significant investment, and I did spend some time rebuilding and insulating the boxes. We have a 9 cu foot frig and 8 cu foot freezer. They are some what on the edge of what the literature suggest. But, I think the insulation
and having seperate boxes have contributed to making the system a pleasure to use.