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SailorFitz
Traveler


Joined: 04/21/05
Posts: 369
Loc: Sarasota, FL (aka The Sun)
A/C Amp Usage
      #1730442 - 04/19/17 02:11 PM (20.137.14.50)

I fully understand my following question is like asking how long will it take me to run from NYC to Boston (strong heart vs weak heart, age, time of year, etc)...but hoping I can get a ballpark / general idea for what I'm in for would be a great help.
My question is....is ABOUT how much to expect to spend on running the boats A/C during sleeping hours while on shore power IF the cost is $0.40 an amp. I know nothing about the boat's systems, other then it's on a 2016 Lipari 41. I'm just wondering if someone here has experience with what a "typical" A/C system on a newer 40ft cat can draw.....thanks guys.
Fitz

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Fitz
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GlennAModerator
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Joined: 04/06/04
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Re: A/C Amp Usage [Re: SailorFitz]
      #1730444 - 04/19/17 02:45 PM (70.177.21.121)

Not sure where the $.40/amp comes from. Normally electrical power is sold in kilowatt hour (KWH) units. With two A/C units a SWAG would be about 1.5 to 3 KW/hour or 12 to 24 KWH/night. Nanny Cay has a few metered slips at $.50/KWH but most marinas charge a flat rate per day or per day per loa foot. Scrub, (just to be different) chartes $.01/foot/amp so for a 50 amp service a 41' boat would pay 50x41x.01 or $20.50 per night.

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Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. - Mark Twain

Edited by GlennA (04/19/17 02:46 PM)


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Ragtime
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Joined: 04/17/06
Posts: 12
Loc: Wichita KS
Re: A/C Amp Usage [Re: GlennA]
      #1730447 - 04/19/17 03:26 PM (70.166.248.158)

Some marinas charge on the basis of connected amps and not usage. So a single connection to a 50a plug would be $20 and two 30a connections would be $24. Not sure about a 50a splitter but probably $24.

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Zanshin
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Joined: 03/23/08
Posts: 1416
Loc: BVI
Re: A/C Amp Usage [Re: Ragtime]
      #1730450 - 04/19/17 03:39 PM (81.248.133.135)

I haven't found a marina in the BVI which actually meters electricity, they've all charged a flat rate depending upon whether 30A connections (simple 110V) or 50A connections (2 x 110V) are used.

Air conditioning will use significantly less amps at night than during the day, I have 5 units aboard and each one will draw about 4.5A (at 110V) when cooling. So, if all units are running plus the water pumps it comes to about 25A. At night this goes down to an average of 5A for all systems (thermostat turned to 25C).

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SV Zanshin


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SailorFitz
Traveler


Joined: 04/21/05
Posts: 369
Loc: Sarasota, FL (aka The Sun)
Re: A/C Amp Usage [Re: GlennA]
      #1730469 - 04/19/17 06:59 PM (47.201.235.71)

Yes, It was related to Scrub ...we are staying there 1 night and their website states "Electricity: 1 per amp per foot"

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Fitz
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Zanshin
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Joined: 03/23/08
Posts: 1416
Loc: BVI
Re: A/C Amp Usage [Re: SailorFitz]
      #1730473 - 04/19/17 07:46 PM (81.248.133.135)

Odd - Amps are absolute measurements and aren't related to boat length; meaning if you use 10Ah it is the same amount of energy regardless of if the boat is 30 feet or 100 feet long!

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SV Zanshin


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Deepcut
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Joined: 01/22/16
Posts: 357
Loc: Georgia & South Carolina
Re: A/C Amp Usage [Re: Zanshin]
      #1730478 - 04/19/17 08:41 PM (71.12.156.163)

Zanshin

You are being to technical.... They want your money and will assign you a cost..

I think they are looking at connection you have and not the amps used... Most not metered at slip...

I think Lovesick Bay Marina was $20 a night on top of slip fee.... All in all a very good deal.

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Wes
s/v Sea Tiger (Lagoon 42)


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BaardJ
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Joined: 05/28/04
Posts: 203
Re: A/C Amp Usage [Re: SailorFitz]
      #1730491 - 04/19/17 11:32 PM (76.125.236.212)

Quote:

SailorFitz said:
Yes, It was related to Scrub ...we are staying there 1 night and their website states "Electricity: 1 per amp per foot"



The Lipari 41 is 39 feet long. It probably has a 50 amp shorepower connection but possibly 30 amp. Scrub will also add 17% service charge to all your marina charges. Assuming 50 amp service, your daily rate will be 39 x 50 x 0.01 x 1.17 = $22.82.


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706jim
Traveler


Joined: 01/11/12
Posts: 406
Re: A/C Amp Usage [Re: BaardJ]
      #1730492 - 04/20/17 01:49 AM (216.211.73.148)

Here in Canada we pay some ridiculous rate for shore power for my tiny 24' boat. Something like $15/day. For a boat that wouldn't use 1kwh per day.

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Zanshin
Traveler


Joined: 03/23/08
Posts: 1416
Loc: BVI
Re: A/C Amp Usage [Re: Deepcut]
      #1730498 - 04/20/17 06:08 AM (81.248.133.135)

Quote:

Deepcut said:
Zanshin

You are being to technical.... They want your money and will assign you a cost..



Please re-read my original post where I stated that all the marinas in the BVI that I know charge a flat rate depending upon your connection. I haven't stayed at Scrub, perhaps they are the only exception.

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SV Zanshin


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SailorFitz
Traveler


Joined: 04/21/05
Posts: 369
Loc: Sarasota, FL (aka The Sun)
Re: A/C Amp Usage [Re: BaardJ]
      #1730504 - 04/20/17 07:16 AM (47.201.235.71)

Quote:

BaardJ said:
Quote:

SailorFitz said:
Yes, It was related to Scrub ...we are staying there 1 night and their website states "Electricity: 1 per amp per foot"





The Lipari 41 is 39 feet long. It probably has a 50 amp shorepower connection but possibly 30 amp. Scrub will also add 17% service charge to all your marina charges. Assuming 50 amp service, your daily rate will be 39 x 50 x 0.01 x 1.17 = $22.82.




Perfect!...thank you.

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Fitz
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warren460
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Joined: 10/06/14
Posts: 1330
Loc: Ontario, Canada
Re: A/C Amp Usage [Re: Zanshin]
      #1730506 - 04/20/17 07:20 AM (174.115.232.136)

Nanny cay has meters on some docks too.

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Warren
S/V Scuba Doo
Lagoon 450


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Ragtime
Traveler


Joined: 04/17/06
Posts: 12
Loc: Wichita KS
Re: A/C Amp Usage [Re: warren460]
      #1730559 - 04/20/17 03:26 PM (70.166.248.158)


The VG Yacht Harbour meters usage and charges accordingly.


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Jccarr
Traveler


Joined: 10/09/12
Posts: 160
Re: A/C Amp Usage [Re: Ragtime]
      #1730589 - 04/21/17 03:17 AM (68.102.33.188)

If on a meter one should consider arriving with a low house battery bank, you will be charging that as well.

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