Can I activate a fan (relay) from either the Quattro or Venus GX based on current temp ?
Yes you can. use use the Assistant options to control on of the AUx relays that would then drive a relay that controls the fan.
OR if you dont use AC2 out on the inverter you could turn that on /off as well and connect the fan directly to ac2 out, and use the assistant to control when AC2 turns the fan on
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