My aux battery is a 110 AH AGM, under the back seat.  I've had no sign of
problems because my starting battery is a stock Group 41 lead-acid battery.
The volt meter seems to give me all the info I need so far.  A more
sophisticated (and much more expensive) battery monitor that shows actual %
capacity would be nice but I didn't go that way.  Also more complex install.

On Feb 12, 2008 10:05 PM, Jeffrey Vickers <jeff@vickersdesign.com> wrote:

> Thanks, Loren. What sort of aux battery do you have? I'm guessing that
> since I'm not using an AGM type of battery for my aux, the 110V charger
> won't care too much that my two batteries don't match. Are you finding that
> a voltmeter is sufficient to tell you how much juice you have left in your
> aux battery?
>
>