For starters, the battery and control panel MUST be located indoors. The float switch and pump include 8' cables. Those can be extended a maximum 26' as long as the same gauge wire is used. The control wire or thinner gauge wire can be spliced as long as the gauge is the same or thicker.
12' extension cables with the Molex plugs for the pump and float are available direct from Basement Watchdog at 800-991-0466.
You would also need to provide extra protection from any possible freezing as this could potentially damage the pump beyond repair.