Jurassic,
Were did you get the diode to use as an isolator? Can you send me the specs on it.
I have a 3000 watt inverter that I want to put in my Hyson side by side, with a separate battery from the vehicle and let the vehicle keep it charged.
Jim Altmiller
Jim, this is the isolator I am installing:
https://a.co/d/4vU5KztIt's rated up to 140 Amps (they have a 300A version as well). It's not a traditional diode, rather, it's a relay. A perk to this is that it doesn't yield a voltage drop like the diodes do among some other benefits.
A good explanation from another forum that I read up on before making my decision:
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The Automatic Charge Relays and Voltage Sensing Relays (different names for essentially the same product) don't have any voltage drop and do something that the diodes can't. They allow the alt. to first bring the starting battery back up to full charge before connecting the [second] battery to charge it. Diodes force the alt. to charge both at the same time, even when they are not at the same state of charge. Relays also disconnect when the charge voltage drops, be that because you turned the engine off or there was some large draw on the starting battery.
Can buy an ACR/VSR in combination with a marine battery switch so that you can force the two batteries to be paralleled or even switch the starting chores to the [second] battery if need be.
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Credit: IH8Mud.com Forum, User: ntsqd
You can read that thread here:
https://forum.ih8mud.com/threads/relay-isolator-vs-diode-isolator.577985/I hope this helps. :)