Found an interesting BMS project, that might help me with the ADC interfacing. The module I brought as 12 ADC channels, but the limitations on input impedance means a simple resistor network would require some beefy resistors and waste a bunch of power…

Here is one project with a interesting solution to ADC issue: http://home.earthlink.net/~evtkw/evbattmon.html

This project references another: http://genki.home.ionet.net/BattMon/BattMonArticle.html

My aim is use the web enabled PIC processor, and interface the batteries via opto-isolators so that I can direct read the voltage via a web page.

The web port of the PIC will connected to a wireless router (have an old one kicking around) that my blackberry can connect to. So I can view the battery status on my phone / PC / etc.