September 5, 2024 What is Bypass mode, and how does it work? Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Bypass mode, also known as UPS (Uninterruptible Power Supply) mode, allows the Ark PRO to provide uninterrupted power during a blackout by switching from grid power to battery power in less than 10ms. Back to blog