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gil-marshall asked

Battery compartment vent

I'm switching from a four pole diode battery combiner to a Cyrix 12/24 230A. On my previous, very old system, the inputs to the diode combiner also fed two relays. When charging, these would energise and switch on a blower to vent the battery compartment. When not charging, the relays were isolated from the batteries by the diodes.

But with the new setup, the charging sources (mains charger and alternator) directly feed the house and start positive bus bars. Is there an easy workaround or will I need to add diodes again between the charge sources and the two bus bars, in order for the blower relays to energise only when charging?

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