***THIS ITEM HAS BEEN DISCONTINUED BY THE MANUFACTURER***
Sentry 300 Automatic Transformer 520008 Low Voltage UL supplied is a low voltage UL approved transformer for this type of application. This device being used is equipped with a DC plug for easy connection to the charge controller and can easily provide 575 cycles of operation a day without decreasing the battery charge. In the event AC power goes out the opener will operate for weeks on the battery (if cycles per day are below 20) before needing service. Again, accessories connected to the opener are critical. Always use Solar Friendly accessories to help avoid premature battery failure in cases of power outages.
Loosen cable gland nut and route the cable from the charge device into the control box (see figure). Ensure that DC plug can reach the charge controller Power In connector.
Tighten cable gland nut to hold cable in place.
Connect the transformer to an approved electrical receptacle.
NOTE: The 110 VAC receptacles should be installed by a qualified electrician, per local building codes.