[RE-wrenches] 48 VDC timer

[Jeremy Rodriguez- All Solar Inc.]

Anyone know of a reliable 48vdc timer to control a well pump?  Pump will be a Grundfos SQ 240VAC. 
The idea is to limit the run time to prevent over discharge of the battery bank. The only charging source for now will be wind power, and the wind gen requires AC voltage to connect. I'm concerned that the batteries may discharge, inverter (VFX 3648) shut down, and we loose input from the turbine. 
May be something else that works too. Right ?? 

Jeremy
All Solar
Sent via BlackBerry. Sorry for typos and shorthand!