Update README.md

Author: jasper-seinhorst

README.md

@@ -30,4 +30,5 @@ To install the *Homebridge Omnik* plugin follow these steps:
 ## Caveats
 - While it's possible to adjust the polling interval, it appears that the inverter refreshes the metrics every 5 minutes.
 - The plugin assumes that the username and password for your inverter are set to default, as per factory settings.
-- The inverters lack an API but provide a web interface. This plugin connects to said interface and extracts the available values. If your inverter utilizes a different interface, resulting in the inability to retrieve values, please raise an issue so we can add support.
+- The inverters lack an API but provide a web interface. This plugin connects to said interface and extracts the available values. If your inverter utilizes a different interface, resulting in the inability to retrieve values, please raise an issue so we can add support.
+- Today's Yield doesn't sync with your timezone. The inverter counts days based on time powered on, instead of the current time.