Join Date: Jan 2006
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1. If its a wet battery it should be vented with either a small diameter pipe directly from the battery to the outside of the van or be in a separate battery compartment vented to the outside. Note that Hydrogen is light so low level vents are not appropriate and because the molecule is so small it will pass through many materials.
2 A period being charged at 14.2V is OK for a wet cell,its not the ideal 14.4, but without temperature compensation its close enough. A maximum 13.8V would result in a battery only 90% charged and would shorten its life.
3. Never mix gel with wet in a single system they will not charge or discharge at the same rates. Experience has shown that both batteries will suffer, and you will get nothing like the expected Amperehours - the same goes for mixing old and new of the same type, or different capacity batteries.
I know some of these points have already been made but thought I would confirm and summarise.