I realize that when you have your remote receiver wired via a pigtail AT THE CONTROLLER that the receiver gets its 24v ac power from the controller. BUT, how can the receiver get power in a manifolded valve box thats 50' to 100' away from the controller, or more, and you have no access to the controller (homeowner not home). I guess the options are: 1. install a pigtail with 50' to 100' leads? Not likely 2. Run some extra extra wires from controller to valve box for the 24v AC power? Dangerous? 3. Use a portable battery source that can power the remote receiver? Other options?