Here are the 4 older solarex panels that I modified to work with a 200 watt grid tie inverter.
The panels started out life on the Oklahomah city library (so I'm told), and were 6 volt 70 watt utility grade polycrystaline pv panels. I traded a little electric scooter for them from a local alternative energy aquaintence. They are aged and probably only max out at around 60 watts. I tested them all in the fall one day, and they all worked within a watt of each other. They happened to put out in the lower 50 watt range that day with that load. I needed to convert them to 12 volts to be compatible with the inverter input voltage and current range. I did this with a little surgery. I split the panel electrically into 2 halves by cutting internal connections thru the silicone potting. Then I put these 2 halves in series to get twice the voltage and half the current as before. It was a success
.
So I made a wooden rack and oriented it to true solar south in my field. I did this with a plum stake and observed the shadow at the sun's transit for that day and my location. The rack is also angled at the optimum winter angle for my area.
