Below is a list of on-line calculators from West Mountain Radio to assist in calculating basic system information to set up your equipment.
Find out what cable size you need depending upon the length of run, voltage at source, and current draw.
Provides the recommended amp-hour rating of your back up battery. In addition to using the information you provide, it considers derating factors such as capacity tolerance, battery life cycle, and run time relative to 20 hrs.
Use one of the above three Antenna calculators to determine the antenna length and which antenna best fits at your location.