Do they make a kit for a sprayer where you can replace a manual valve with an electric valve that you can operate from inside a cab?
How hard is it to wire this unit up?http://www.agrisupply.com/sprayer-control-valve-single-switch-control/p/40298/
Or you can get your own parts and make one..
http://www.agrisupply.com/volt-single-electric-boom-shutoff-solenoid-valve/p/39370/
That valve is very similar to the one I have now. I think my unit uses 3/4 inch pipe.What tractor do you have (wondering about your electrical panel). Also, how tight is the cab? I don't know what it takes to get a wire into the cab...
What size hose connections do you have now? Are you replacing something like this?
http://www.agrisupply.com/manual-valve-gpm-psi/p/72483/