Do I need to keep my Flowie plugged in? October 18, 2020 10:51 Updated Yes, it should remain plugged in at all times. Flowie has an internal rechargeable battery that will keep it running for about a day in the event of a power outage. Related articles What do I need to install the Flowie water sensor? Flowie Quick Start Guide Where do I install my Flowie water sensor? Will Flowie work on a compound water meter? Extension Antenna Quick Start Guide