So, as some anonymous person said "All I want is really very simple..."
I have a solar controller that can handle up to 150VDC input and pass up to 92 Amps to my batteries.
I have more solar panels than those currently installed, and I would like to use them on cloudy days (when the series voltage drops below some level - lets say 120V).
What I am looking for is a very simple (hah!) controller that will turn on a relay when the voltage drops (thus putting an extra group of solar panels online) and turn it off when it rises to somewhere close to 150V.
Since the solar panels are some distance away from any low voltage power source, it would be very nice if the circuit could be powered by the current/voltage being fed down the cables to the batteries, to save me running extra wire to the solar panels.
See, simple. Help!
I have a solar controller that can handle up to 150VDC input and pass up to 92 Amps to my batteries.
I have more solar panels than those currently installed, and I would like to use them on cloudy days (when the series voltage drops below some level - lets say 120V).
What I am looking for is a very simple (hah!) controller that will turn on a relay when the voltage drops (thus putting an extra group of solar panels online) and turn it off when it rises to somewhere close to 150V.
Since the solar panels are some distance away from any low voltage power source, it would be very nice if the circuit could be powered by the current/voltage being fed down the cables to the batteries, to save me running extra wire to the solar panels.
See, simple. Help!