I think 5 years is the problem. Solar cells have a finite life. Buy new
ones.Five years is about end of life.
Steve

"ltkhbl" u25506@uwe wrote in message news:6505f61907dfe@uwe...
I have two 120 watt panels on my catamaran. They now only put out 6 volts.
What series of steps would you suggest to find the problem? They have
worked
well for the past five years.