"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 - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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