Thank you for your question, Jessica B! The solenoid assembly is a component or "valve" that opens and closes when the faucet is touched. The faucet will work manually with the handle so long as this valve is open, however if left in a "closed" position while without power, this valve is unable to open on its own. Before this happens, the faucet can be put into a manual model by touching the faucet on and removing the lid of the battery box, or by removing the solenoid assembly entirely. An optional A/C power supply is available for purchase and will work in conjunction with the battery pack to ensure your model never looses power.
Best regards, Edward
Date published: 2019-08-05