Why is my B-TEC App showing an alarm?

We understand this might appear concerning, and we would like to assure you that there is no cause for concern.

The high voltage alarm you're seeing is a normal function of the battery. It indicates that one of the individual battery cells has reached its maximum recommended charge voltage before the others. This is a common occurrence in lithium batteries, which are comprised of independent cells (typically 3.2V) that are connected in series/parallel.

Many lithium batteries, including those without Bluetooth App functionality, are designed with built-in protective features such as ‘overcharge protection’ or ‘over voltage protection’ within the Battery Management System (BMS). The difference here is that, with the BTEC App, this functionality is visible to you. For most other batteries, these protective mechanisms remain hidden from view, but rest assured, they serve the same purpose of ensuring the battery's safety and longevity.

As lithium batteries age and undergo more charge cycles, slight imbalances between cells can occur. This may result in a minor reduction in usable amp-hour capacity over time, known as battery degradation. However, these imbalances are typically well within acceptable limits and do not affect the overall performance or safety of the battery.

The integration of cell visibility into the BTEC App is something we’ve chosen to offer, providing consumers with insights that are typically reserved for manufacturers or service agents conducting diagnostics. While this additional visibility can be informative, it is not generally necessary for the average user, as it does not impact the functionality or safety of your battery.

We fully understand that seeing the high voltage alarm may cause unnecessary concern, and we want to reassure you that this is simply an indication that your battery is fully charged, as detected by the BMS. This is part of the normal operation of the system.

If these batteries are of the G2 (removable lid) variety, and the customer wishes to discuss this matter further, please refer them to our support team directly in an email with their details addressed to support.enerdrive@dometic.com

As a last resort measure only, we can offer to try and top balance the battery, but we can not guarantee that this will resolve the alarm.