Can I connect a battery to the rachio so it will work if the power goes out?
@rcalonica - a UPS would need to be used that provides AC power as the Rachio and solenoids use AC power. Assuming that there is not a pump to be powered and the schedule was already downloaded to the Rachio, a UPS should keep it working during a power outage. Without WiFi there won’t be any remote control available, nor schedule changes due to weather.
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Yes, you can connect a battery backup to a Rachio smart sprinkler controller to ensure it continues to operate during a power outage. Rachio controllers support certain models of uninterruptible power supplies (UPS) that provide backup power.