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Old 08-09-2008, 20:15   #1
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Electrical upgrade to 50amps

Hi all. Need some advice. I want to add a additional Air conditioning unit to my Endeavour 40. Currently I have a 16000 BTU drawing about 12 amps, and want to add a additional 18500 BTU drawing 16 amps cooling. Combined cooling amps would be 27.5 and heat would be 37.5.
My currrent panel is the original Endeavour 30 amp service. I also have of course, multiple outlets, water heater, charger.
I have searched the forums, and while finding useful info, not really seeing what I need so hear is my question.

What would be best, to change out my system for a 50 amp shore power setup, with a new 50 amp ac panel and breakers, or use 2 30 amp shore connectors?

I understand that the 50 amp system would be significantly more money, for all the parts. I know that I can run 2 30 amp shore power cords, (slthough at my marina in Corpus Christi, I have the choice of 30 or 50 amp, so would need a adapter for the 2nd 30 amp circuit.)
What would be best for now and future upgrades. For the next 12 years the boat will be spending a lot of time at the dock, and if you know Texas weather, AC is imperative for me and my family. Eventualy I will add a genset, but that is down the road a bit.

I also will upgrade the 12 volt side as well, but for now, what should be done to do it right ?
I am thinking about the blue sea 8406 AC Main + 8 Positions - PN 8406 - Blue Sea Systems

I want to keep the 120 and 12v panels separated.
Any other thoughts, opinions, etc, i'm all ears.

Thanks.
Bob
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Old 08-09-2008, 20:30   #2
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Adding 16,000 plus 18,500 is a WHOLE lot of cooling unless you want a walk in freezer. One 18,500 unit should cool the whole boat easily. I can cool a large 36 ft boat with 16,000 and in 100 degree heat and high humidity no problem and I have 1 - 30 amp connection.

The use of an adapter adds $300 at most. You could run a straight connection to the A/C and reduce costs but you might need to recompute the A/C needs. How did you come up with this number?
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Old 08-09-2008, 21:42   #3
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Quote:
Originally Posted by Pblais View Post
Adding 16,000 plus 18,500 is a WHOLE lot of cooling unless you want a walk in freezer. One 18,500 unit should cool the whole boat easily. I can cool a large 36 ft boat with 16,000 and in 100 degree heat and high humidity no problem and I have 1 - 30 amp connection.

The use of an adapter adds $300 at most. You could run a straight connection to the A/C and reduce costs but you might need to recompute the A/C needs. How did you come up with this number?
I have a 16500 unit now and it don't cool didly.
here in Texas we have a abundance of three things , heat, humidity and roaches. And Thank god I only have 2 to worry about on this boat.

Since I need additional cooling, I figure adding a better unit for not much more money is the way to go. I have a frendship marine unit now, Self Contained Marine Air Conditioning Systems - Prices & Specifications
and it don't work here in the day time in texas.
So thats why the question.
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