Reply
 
Thread Tools Search this Thread
 
Old 14 March 2015, 13:44   #1
Member
 
Country: Ireland
Length: no boat
Join Date: Mar 2015
Posts: 39
Newbie Battery question

Hi lads

I'm in the market for a second hand RIB. Most of the ones I have seen have no electrics i.e. VHF, Nav lights etc.

My question is how does a outboard engine charge the battery?

And would there be much involved in fitting a VHF, fish finder, Nav lights etc?

Sorry for the stupid questions, just never owned a RIB before..

Thanks
__________________

__________________
Johnny1 is offline   Reply With Quote
Old 15 March 2015, 05:59   #2
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
An outboard charges a battery the same way as a car does via an alternator. Some small outboards may have a "lighting" circuit which can power navigation lights but isn't directly suitable for charging a battery, but can be made so with a regulator and rectifier.

If your outboard doesn't have this and isn't electric start then adding charging is not a trivial job. If it is electric start then the chunky wires that provide juice to the starter also charge the battery.

Some very small ribs/sibs without charging will use a removable battery that is charged at home (or charged from car during towing) but you then need to be very conscious about power consumption - but plenty of yachts manage multiday trips without charging so it's possible if you are careful.
__________________
Poly is online now   Reply With Quote
Old 15 March 2015, 06:06   #3
Member
 
Country: UK - England
Town: East
Boat name: Seaflyer
Make: Humber
Length: 6m +
Engine: Evinrude
Join Date: Feb 2014
Posts: 199
You can also reduce battery consumption by using LED lights instead of the `normal' incandescent type.
__________________
Seaflyer02 is offline   Reply With Quote
Old 15 March 2015, 08:53   #4
Member
 
Country: Ireland
Length: no boat
Join Date: Mar 2015
Posts: 39
Thank you lads, Poly that clears up a lot.

And Seaflyer when I buy, as it will be second hand I plan on changing the lights to LED.

How hard is it to wire in a VHF and fish finder? Is it simply fuse them and connect to battery or what?
__________________
Johnny1 is offline   Reply With Quote
Old 15 March 2015, 10:01   #5
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by Johnny1 View Post
How hard is it to wire in a VHF and fish finder? Is it simply fuse them and connect to battery or what?
Pretty much. You may well want some switches. You will probably want a data link between vhf and GPS, but nothing particularly complex.
__________________
Poly is online now   Reply With Quote
Old 15 March 2015, 11:00   #6
Member
 
Country: Ireland
Length: no boat
Join Date: Mar 2015
Posts: 39
Quote:
Originally Posted by Poly View Post
Pretty much. You may well want some switches. You will probably want a data link between vhf and GPS, but nothing particularly complex.
Switches for what?

Never thought of a data link thank you, this is a great forum thanks Poly.
__________________
Johnny1 is offline   Reply With Quote
Old 16 March 2015, 05:06   #7
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by Johnny1 View Post
Switches for what?
Often people have individual power switches for each* electrical item. This lets you turn stuff off to save power (or at night to help protect night vision), or if there is a fault (if something starts smoking do you want to be trying to get into the console to pull a fuse?) or to help with fault finding. They will often have these on a nice panel with nav light switch, bilge pump switch etc. Switch panels often include fuses/breakers, which makes for a neater install, and simplifies trouble shooting the mass of red spaghetti found in a lot of consoles!

Each item usually has its own power on button - but if it is a "soft key" (i.e. something that doesn't have a "click") then it probably draws a little current even when off. If you are drifting off the coast with a dead engine your VHF (and possibly GPS) are rather critical features you don't want your sounder, your bilge pump auto sense circuit, your music system, your phone charger or anything else draining the battery!

* there is a common school of thought that the VHF should be wired directly to the battery (with its own fuse) as it is safety critical so should bypass any master switch, bus bar etc.
__________________
Poly is online now   Reply With Quote
Old 16 March 2015, 07:24   #8
Member
 
Country: Ireland
Length: no boat
Join Date: Mar 2015
Posts: 39
Quote:
Originally Posted by Poly View Post
Often people have individual power switches for each* electrical item. This lets you turn stuff off to save power (or at night to help protect night vision), or if there is a fault (if something starts smoking do you want to be trying to get into the console to pull a fuse?) or to help with fault finding. They will often have these on a nice panel with nav light switch, bilge pump switch etc. Switch panels often include fuses/breakers, which makes for a neater install, and simplifies trouble shooting the mass of red spaghetti found in a lot of consoles!

Each item usually has its own power on button - but if it is a "soft key" (i.e. something that doesn't have a "click") then it probably draws a little current even when off. If you are drifting off the coast with a dead engine your VHF (and possibly GPS) are rather critical features you don't want your sounder, your bilge pump auto sense circuit, your music system, your phone charger or anything else draining the battery!

* there is a common school of thought that the VHF should be wired directly to the battery (with its own fuse) as it is safety critical so should bypass any master switch, bus bar etc.
I have come across the VHF wired directly suggestion and I will take that one on board.

The other electrics I plan on having are a depth sounder, nav lights and bilge pump.

I will put a switch on the nav lights.

Would you suggest putting a switch on the depth sounder and bilge pump?
__________________
Johnny1 is offline   Reply With Quote
Old 16 March 2015, 07:49   #9
Member
 
boristhebold's Avatar
 
Country: UK - England
Length: 7m +
Join Date: Aug 2009
Posts: 1,293
And depending upon size of Rib even for a one engine set-up you may want two batteries, a voltage charging system and battery bank switch plus bus bars and other switches for bilge pump, nav lights, electronics etc. Permanent supply and switched supply.

For example my Rib to give you an idea,

One engine, two batteries connected via individual switches that can also connect both in an emergency, one battery used for electronics, lights etc and one for engine starting. Also helps having two batteries as batteries can die.

One permanent supply via a switch to the bilge pump (if left in water), other switches for nav lights, steaming light, bus bar and individual fuses for exelectronics, vhf, ais, fusion music centre.
__________________
boristhebold is offline   Reply With Quote
Old 16 March 2015, 08:00   #10
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Quote:
Originally Posted by Poly View Post

* there is a common school of thought that the VHF should be wired directly to the battery (with its own fuse) as it is safety critical so should bypass any master switch, bus bar etc.

We obviously went to different schools, as that's a 1st for me. :-)
__________________

__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:42.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.