The Dyness Stack100 Pro extension set, heated. 

This is an extension set that allows you to split your Stack. 

Explanation on combining heated and unheated Stack100 Pro modules and BDUs:

1.    If the BDU has a heating function but the battery modules do not, or if heated and unheated battery modules are used together, the BDU reports an error. Solution: Update the BDU software remotely to disable the heating function.

2.    If the BDU does not have a heating function but the battery modules do, or if heated and unheated battery modules are mixed, the entire system operates normally without the heating function and the BDU does not report an error.