The Hunter Node and WVC battery powered controllers can have the valve installed a maximum of 100 feet away.
Below is a chart indicating maximum wire lengths when using a Hunter DC latching solenoid combined with a Hunter XC Hybrid controller.
18 AWG / 1.0 mm
16 AWG / 1.2 mm
14 AWG / 1.6 mm
12 AWG / 2.0 mm
* Using Hunter DC Latching Solenoids
From a battery life standpoint, the answer is not as easy as saying "the batteries will last for two years". The answer really depends upon the number of actuations that the controller operates over a given period of time. The chart below provides the maximum on/off actuations based upon the period of operation. If you want the batteries to last one year, the maximum number of on/off actuations is 7,300.
MAX ON/OFF ACTUATIONS