Hey,
I just finished getting my garage off the grid, and I'm pretty happy with what I have so far, using a 400w Air-X and a set of four Mitsu 125w 12v PVs (all wired for 24v).
I would like to find a simple "diversion controller", basically a switch that flips if the voltage on my battery array is over a certain amount, so I can power some "optional" equipment with the extra power, such as a ceiling fan.
Can anyone point me to such a thing? I would imagine this device would have a hysteresis, like a thermostat, so it would turn "on" at, say 28v, and turn off at 26.5v, or something like that. The on/off action could be very simple, and just power a relay, that would act as a switch to turn on some things that I only need to run when there's extra power to burn.
The reason behind this is that I'm often at the office during the day (while the hot summer sun would be beating down on my solar panels). If the ceiling fan or a ventelator could turn on, it would keep my garage cool so when I get there in the eve, it's not so unbearably hot.
Any ideas?
