I am looking to add some additional solar to my 2004 Dynasty, I will be removing the existing 100 watt panel and adding (4) 200 watt panels for total of 800 watts. Currently I have the RV-45D original charge controller, but suspect I would need to change that out. If I install a new charge controller I would lose the ability to have solar charge both the house and chassis batteries ad the RV-45D has the ability to charge both the house and the chassis but most new MPPT charge controllers don't have that capability, what have other done to accommodate charging chassis batteries when installing a new controller?