MODEL：10W/20W/30W Solar Panel
The solar panel is beneficial because it provides cycle storage where AC power is unavailable. The 3*10 watt solar panel and 12AH back up battery kit are enough to meet the service requirement in most areas.
Note: The solar panel is not allowed to use before the back up battery is installed. With the solar panel , the back up battery can be charged both by the control box from AC power and directly by solar panel.