I have been following the discussion about measuring battery voltage. I was intrigued with the GPS voltage readout, but unfortunately my IQ3000 GPS (based on Palm operating system) does not seem to have that feature. Then I found a couple of units, sold by Amazon among others, that cost about $10 to $12 and plug into the cigarette lighter socket (my panel has two). They provide a digital voltage readout as well as led battery condition lights. I think I'll go that way.
Bill Liggett
