The Solar / battery powered barrier has all it needs contained within the gate cabinet. Controlled via a transmitter fob, keypoad, tlephone or intercom the whole set up can be relocated when required. The carbon fibre arms are protected by a clutch thgat allows the arm to survive accidental vehicle impacts. Just pull the arm back ionto place. The system has been designed for solar / Battery power from the outset and is not a solar panel oput on an existing design.