I have a 2018 Pinnacle that apparently does not have a setting/switch for charging lithium batteries according to the manual….. how much trouble is it to change out to a converter that will charge lithium?…. I have 525 solar and have set the parameters to the recommended setting per my controller …. Is it necessary to change the converter ? … I have 2 x 300ah lithium batteries installed….hoping to do some boondocking….