Sounds like trombetta or bird relay(small black box) near trombetta.the bird controls the trombetta.ive had to replce my bird twice.test with a volt meter.if any batts are charging by any means,2 mins later the bird tells trombetta to close and connect all batts,if any bat is discharging trombetta should open circuit to sep batteries.emergency switch bypasses bird and closes the cicuit in trombetta
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