Our boat has two engines - and thus two 8D starting batteries and two 12V alternators for charing them.
There is a battery bridge relay that can combine the two starting batteries to help start the engines - but it is non-functional.
Rather than replace the old relay - would a Cyrix-ct or Cyrix-i do the job?
Is there any downside of using it in this configuration? All the documentation I have found is focused on combining a starting and a house battery - but is there a reason not to use it for two starting batteries?
I like that if one alternator fails - the other engine's alternator will still be able to charge both starting batteries this way.
And at some point soon I plan to replace one of the 12V alternators with a 24V alternator for charging the house battery bank. Once I do this, the single remaining 12V alternator should be able to charge both starting batteries easily through the Cyrix.
Is there any downside to doing this?