Page 1 of 2 12 LastLast
Results 1 to 10 of 17
  1. #1
    Join Date
    Sep 2018
    Location
    London
    Posts
    80

    Default Electric installation for small yacht - am I doing it right?

    Hi,
    I am doing electric installation in my Achilles 24 from scratch.
    Receivers are:
    - navigational LED lamps
    - standard VHF radio
    - deep sounder (either Nasa or Seafarer)
    - maybe log in the future?
    - 12 V socket for phone/tablet

    No inboard.

    Battery is 75 Ah, will be loaded with 2W solar panel. Probably I won't do any night sailing this season.
    My plan is simple: cables to battery, simple switch on positive cable, then standard 6 position circuit breaker panel, with receivers. Negative from panel to negative in battery.

    Are there any flaws in my plan?

  2. #2
    Join Date
    May 2001
    Location
    UK East Coast
    Posts
    36,036

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by slawosz View Post

    Are there any flaws in my plan?
    You need to include a fuse in the positive cable, as close to the battery as possible.

  3. #3
    Join Date
    Sep 2018
    Location
    London
    Posts
    80

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by pvb View Post
    You need to include a fuse in the positive cable, as close to the battery as possible.
    Thank you. Could you give me link to suitable fuse, ideally with box?

    I forgot to mention, cable from battery is around 2-3 mm diameter, as I don't think there will be huge load there.

  4. #4
    Join Date
    Aug 2013
    Location
    SW Scotland
    Posts
    19,368

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by pvb View Post
    You need to include a fuse in the positive cable, as close to the battery as possible.
    Just like cars don't have?
    "Seamen are always wanting to do things the proper way; and I like to do them my way."

  5. #5
    Join Date
    Feb 2019
    Location
    The Known Universe
    Posts
    1,074

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by slawosz View Post
    Thank you. Could you give me link to suitable fuse, ideally with box?

    I forgot to mention, cable from battery is around 2-3 mm diameter, as I don't think there will be huge load there.
    Have a look at 12 volt planet on the web good service and some info you can read up on
    Flying birds have no master

  6. #6
    Join Date
    Feb 2019
    Location
    The Known Universe
    Posts
    1,074

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by JumbleDuck View Post
    Just like cars don't have?
    Yes it is an intresting though, I have a 200 amp fuse at Battery level after extensive research , but your right a car does not have this
    One can maybe conlcude that a large boat and even medium sizes have a lot of electronics, lights or varying uses and power, Navigation aids including autopilot etc. which can demand more power and have potential for a short somewere
    Just my thoughs on it no expert
    Flying birds have no master

  7. #7
    Join Date
    Aug 2013
    Location
    SW Scotland
    Posts
    19,368

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by FlyingGoose View Post
    Yes it is an intresting though, I have a 200 amp fuse at Battery level after extensive research , but your right a car does not have this
    One can maybe conlcude that a large boat and even medium sizes have a lot of electronics, lights or varying uses and power, Navigation aids including autopilot etc. which can demand more power and have potential for a short somewere
    Just my thoughs on it no expert
    I'm a great fan of keeping things simple, so while I am not actually against battery fuses, I'm not quite sure what purpose they serve. Protecting the wires, yes, but are the wires actually under enough threat to justify adding further points of potential failure to the system?

    Maybe it's because cars typically only have one significant current draw - the starter motor - while boats may have inverters as well, but it still seems to me that fastening down the wires well would be a simpler solution. A bit like having well mounted gas pipes seems a lot simpler to me than faffing about with solenoids, valves, bubble testers and the like, each of which offers another two (at least) potential leaks.

    I have a small house bank of 2 x 65Ah and a standard 063 starter battery. Each of these is connected to a 250A thermal breaker on the way to the dual-circuit master switch, but that's more because the breakers offer a simple way to isolate either battery if I need to than because I am worried about 250A+ shorts ...

    I'm completely open to argments here.
    "Seamen are always wanting to do things the proper way; and I like to do them my way."

  8. #8
    Join Date
    May 2009
    Location
    Wirral
    Posts
    673

    Default Re: Electric installation for small yacht - am I doing it right?

    A 2w solar panel wont do much,do you mean 20w.
    Leisure Owners Association

  9. #9
    Join Date
    Sep 2018
    Location
    London
    Posts
    80

    Default Re: Electric installation for small yacht - am I doing it right?

    Quote Originally Posted by peteK View Post
    A 2w solar panel wont do much,do you mean 20w.
    Its 2W. But as you see, I have very low consumption, and will use boat just few times a month for short (max 40 miles) cruising, so I belive it should be fine.

  10. #10
    Join Date
    May 2009
    Location
    Wirral
    Posts
    673

    Default Re: Electric installation for small yacht - am I doing it right?

    Unless you have another means of charging your battery will just go flat with all that equipment .
    I suggest a minimum of 10w or 20w with a regulater.
    Leisure Owners Association

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Latest YBW News

Find Boats For Sale

to
to