I have converted my house batteries to 600 ah of Lithium, and they are working well. The Li batteries are either charged from the AC (Cristec) charger or from a Renergy 60 amp 12 v to 12 v charger connected to my start battery. The Renology charger is set to Lithium charging at 14.6 v (recommended charging v), while the Cristec charger is set to a maximum voltage of 14.4 v.. The Renergy charger is wired to only operate when the engine driven alternator is producing voltage. I could also wire the Renergy charger to operate when the Cristec charger is producing voltage. Would this be a good idea?