"Attaching ohm meter as I described showed 19.5 volts which I think is too high"
Jim, the "open circuit" unloaded voltage output, Voc, may be in the 19 to over 20 volt range depending on the sunlight and angle and the panels rating, so that 19.5 volts doesnt surprise me. Its important to what the voltage is when connected to a load and to what voltage it might raise a given battery that tells you more.
"Can solar panel leads be attached directly to battery as long as polarity is correct?"
They could be connected direct without a charge controller in place and "work". Depending on the panel rating and sunlight and the battery I suppose there's "some" chance the battery could become overcharged, that's one reason for using a charge controller.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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