wiring battery isolator

[jomart01]

I' like to add a house battery to my twin (outboards)Johnson 115 Hp Mako boat. Now I have two batteries and 2 (1-2-all) switches. My question is if I can use an isolator(2 alt 3 batt) and how to wire it.Thanks

 

[18rabbit]

Re: wiring battery isolator

I’ve never been a fan of battery isolators. I prefer solenoids/relays. If I were to accomplish what you want to do I would simply place an automatic charging relay between engine-1 battery and the house bank, and another acr between engine-2 battery and the house bank. Whenever either (or both) engines are running the acr will sense when the starting battery is charged and then close, making a connection to relay the charging voltage to the house bank. Whenever there is no charging voltage present the acr opens, preventing the house system from drawing voltage from the starting system(s).

 

[Peter J Fraser]

Re: wiring battery isolator

Have a look at this web page. BEP Marine or this Multi engine set <br />This is what I have installed on my boat which I am rebuilding at present.<br />Like 18rabbit prefers, its charging is automatic to the house battery and there are many different options to suit your installation requirements.<br />BEP products are avail in the USA but shop around as you wish.<br />Good luck,<br /> <br />Regards<br />Peter

 

[18rabbit]

Re: wiring battery isolator

From what I have seen of BEP Marine produces it's good stuff. Limited distribution in the US.<br /><br />If everything else is already in place, Blue Sea Systems offers an acr:<br /><br /> http://www.bluesea.com/product.asp?Product_id=22756

 

[Boatin Bob]

Re: wiring battery isolator

Try this link, it has some basic wiring pictures for batteries/switches and isolators. Diagram F is for a 2 alt- 3 batt isolator Isolator Diagrams

 

[Peter J Fraser]

Re: wiring battery isolator

18rabbit,<br />Your right on both points but I gave the info for comparison. There are wiring diagrams in .pdf available from their website also.<br />Most of the marine industry here uses BEP products.<br />I used them because at this point I figured that I only get one shot at geting this boat right before it's relaunched this summer (I hope)<br />Peter

 

[Ralph 123]

Re: wiring battery isolator

Here is Westmarines offering. I've used these for a 3-bank system for the last 3 seasons and am very please. You can often find these brand new on eBay for less than half price<br /><br /> http://www.westmarine.com/webapp/wc...0001&langId=-1&catalogId=10001&productId=5461 <br /><br />If you click on the links near the bottom you can see the instructions and schematics.

 

[jomart01]

Re: wiring battery isolator

You people make this forum so usefull. Thanks everybody for replying.