If it goes over 13 volts then the B.I.R.D may try to switch in the house batteries also. The use/store switch will not prevent this as the relay is between the house batteries and the distribution panel.
As soon as my solar system goes above 13 volts, after the time delay, the Trombetta is picked up and ties the house and cranking batteries together.
Unless your B.I.R.D is wired wrong like mine was.
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2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy
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