Another... that makes four

[Boatman]

Just acquired another engine this time attached to a boat, Yamaha 80 2 stroke

Question is I want to connect another battery to run stereo system, GPS etc do I connect it in parallel or series and what diodes do I need in between as I don?t want to run down starter battery.


<P ID="edit"><FONT SIZE=-1>Edited by Boatman on Mon Mar 18 16:20:57 2002 (server time).</FONT></P>

 

[BarryH]

Easiest way to connect 2 batteries is with a battery switch, Normally 4 position. Batt1 Batt2 both and off. Dont connect the batteries in series as this will give you 24 volts into a 12 volt system. Goes well for about 2 seconds then just goes up in smoke. Or you can buy a blocking diode from most engine dealers, altho i dont like em a lot, had so many probs with them

 

[boatone]

As BarryH says best solution for a simple two battery rig is to use a 1-both-2 switch in the charging side so that either or both batteries can be charged. DONT use a blocking diode-they suck almost a volt of charge which should get into the batteries. Use battery 1 for starter only and battery 2 for domestics. In emergency you could use a croc lead between positives (assuming common negative circuit) to get you started from domestic battery. Pay attention to your alternator may need beefing up. Adverc have some info on their website - http://www.adverc.co.uk

TonyR
boatone@boatsontheweb.com
www.boatsonthethames.co.uk