"There are varying opinions on batteries:
1) Only buy Costco golf cart batteries, they are cheap, rugged and work well.
2) Only buy pairs of 6volt batteries, they are 'better' than 12volt
3) Only buy pairs of 12volt batteries, if one fails you still have one
4) Only buy AGM batteries because they are 'better', somehow
5) Only buy regular lead acid, all this new AGM stuff is just fluff to make you spend more money
6) Only buy Lithium, lead acid is so last century"
Great summary!

"I've read them all and more from folks positive they are right." yep, they are all right and what ever you choose you are wrong!
"My theory is buy the best battery for the purpose at the best price and don't sweat it. More important is actually understanding the technology and charging cycle of the battery you are using. Tune your charger to what the battery manufacturer recommends. One thing I already regret is not insisting on replacing the standard Parallax converter with a more modern 3 or 4 stage one. Used improperly you can fry your batteries on old tech single stage chargers without really understanding why. "
I can't figure why PC is using a Parallax converter/charger. Parallax's webpage tells you nothing about the charging profile and as far as I know they are still using the cheap 2 stage charging. When I first got the Born Free (which had a Parallax in that early model) I was blithefully dumb and left the RV plugged in too long and fried the batteries. That was my first education on charger/controllers. i replaced it with a Progressive Dynamics converter/charger and the batteries with Lifeline AGMs (which are the only AGMs I know of that like an equalization) and can now leave the RV plugged in at home for months at a time.
You need to know what you want to charge and how to charge it correctly both in regards to converter/chargers and if you go solar, the solar charger.
The Parallax can work fine if you keep an eye on the water levels of regular lead acid batteries and if you employ a separate charger to periodically do an equalization. But..for a few dollars more PC could have gone to a better charger.
