Tower external battery module (EBM) for Eaton 9E 6Ki. Up to 4 EBM can be added to extend run time to the Eaton 9E. The Eaton 9E is an online double conversion UPS, Internal and Maintenance Bypass, LCD interface, USB & Serial ports, power management software compatible with virtual environment, slot for optional com card, optional external battery modules (up to 4), CE certified, safety certification provided by external laboratory (TUV), both 1:1 and 3:1 available (combo).