Have a Renogy DC-DC converter; yes it has a delay before it enables the alternator voltage to start charging the house batteries. The instructions state you can run an "ignition" wire of 18 AWG to an always energized positive terminal so that the DCC knows the house voltage at all times. Yes...
Thanks for reading and providing this update. One of the questions asked by your Customers in the DC Home app is retrofit to existing 2000/3000 inverter Charger models; Will that be possible or a trade in program?
Renogy support told me older models will never support BT-2. Users would need to purchase the models that do or will support the module. As of today, none exist but some new models would be releasing in May or June.