Hello @WynneIT. Thank You for the question!   Since the UPS is connected for more than 8 hours, it is normal to have battery capacity of 100%.   Also you can visit this site for various documents - https://www.se.com/ww/en/product-range-download/61915-smart-ups/#/documents-tab   I hope this helps! Also please feel free to ask any further queries!    We are also adding a new open community focusing on UPS and related systems on this platform where you will be able to access much more information and discussion 🙂 ... View more