How does a gate run off of solar power?

The gate actually runs off of a 12 or 24-volt battery. The solar panel just recharges the battery. Depending on the amount of times the gate is used, the safety features, and the amount of sun available the solar panel may not be feasible.

How does the gate close?

If you want the gate to automatically close behind you then additional safety features need to be installed to prevent anything from being struck by the gate.

How will guests open the gate?

When designing a gate system the homeowner needs to consider how guests enter/exit the property. Entry can be granted with a telephone intercom, a keypad, remote transmitter (similar to a garage door opener) or a separate entrance not controlled by an operator.