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<blockquote data-quote="loopkiller" data-source="post: 5648174" data-attributes="member: 601690">Stinger makes both Diode and Solenoid type isolators. Those eBay links were for Solenoid types which only isolate the batteries when the engine is turned off. Diode style relays always keep the batteries separate. You should look for a diode based isolator IMO. The only downside to the diode based isolators is that you will lose around half a volt using it. So it is recommended that you increase your alt output voltage to 15.0~15.5v to offset the loss.EDIT: I just researched another new style of isolator that is based on FETs instead of diodes. ARGO makes some, but I have not found a US source yet. I will keep looking and let you know what I find. <a href="http://www.victronenergy.com/upload/documents/Datasheet%20-%20Argo%20FET%20Battery%20Isolators%20-%20rev%2001%20-%20EN.pdf" target="_blank">LINK</a>. They only go up to a 200a model as far as I can tell though.</blockquote>

[QUOTE="loopkiller, post: 5648174, member: 601690"] Stinger makes both Diode and Solenoid type isolators. Those eBay links were for Solenoid types which only isolate the batteries when the engine is turned off. Diode style relays always keep the batteries separate. You should look for a diode based isolator IMO. The only downside to the diode based isolators is that you will lose around half a volt using it. So it is recommended that you increase your alt output voltage to 15.0~15.5v to offset the loss. EDIT: I just researched another new style of isolator that is based on FETs instead of diodes. ARGO makes some, but I have not found a US source yet. I will keep looking and let you know what I find. [URL="http://www.victronenergy.com/upload/documents/Datasheet%20-%20Argo%20FET%20Battery%20Isolators%20-%20rev%2001%20-%20EN.pdf"]LINK[/URL]. They only go up to a 200a model as far as I can tell though. [/QUOTE]

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