On Tue, Jan 26, 2010 at 3:44 PM, Erik Lundberg <ealundberg74@yahoo.com>wrote:

>   Still doesn't answer the original question though - is there an
> instrument that can be wired into the van that will give some indication of
> the battery's effectiveness?
>
There are many 'battery management' systems on the market that will give
readings like you are asking about.  But they are fairley large and with a
big price tag.  Go to any of the online vendors selling solar charging
setups and they will have a variety of them.

>
> Is there some way to load test the battery in place with some accuracy, or
> does it require removal and proper testing by a licensed technician?
>

There is a section of the link you provided earlier that discusses just
that.

>
>