Hi Nuz,
Thanks for your message. Am I overlooking something here - why not use two resistors in a voltage divider configuration? If you used something easy such as a 1:10 ratio then every 1V = 10V. This means the max measurable voltage would be 1.7V.
You could get the full window of operation by using 10:17 ratio; which means for every 10V you are measuring 17V. That, or change the Vref of the test equipment to 1.7V and use the 1:10 ratio. Lot’s of options, all up to you. Whichever configuration you use, the actual voltage can be calculated with the divider ratio in mind.
If the voltage divider is an option then here is a voltage divider calculator. Perhaps the key issue you will run into either way is the input impedance of whatever the device you are measuring with - you want it to be as high as possible as to not draw excessive current from the panels but allow accurate readings to be taken.
Regarding the DFR0051 - it will step down the voltage 5x, which doesn’t seem necessary if you have a couple of resistors around.
