I have often been flamed for saying "There are no six volt batteries in RV's"
Now.. the reason for this is simple.. When you use GC-2's (Six volt batteries when in the store) you wire two of them in series, this makes a bit 12 volt battery.. So what you have is a 2 piece 12 volt battery.
Looking at it this way the question becomes
Can I charge two 12 volt batteries in parallel at the same time
The answer of course is YES.. IN fact that is EXACTLY how my RV worked when delivered... Two Six Volt GC-2's in series for the house and one 12 volt Gorup 70somethign for the engine in parallel.
Now it has some additional 12 volt batteries in parallel several hundred amp horus.
