With the HV Premium Combiner Box from BYD, up to 3 storage units of the HVS and HVM series can be interconnected quickly and efficiently. Due to the parallel connection, the towers must have the same voltage level (number of batteries) and the same charge level. This is particularly important when expanding memory. In addition, the connection cables from the towers to the combiner box must be of the same length. The planned configuration must be checked for approval in BYD’s “Premium HV Compatible Inverter List”. As before, HVS, HVM and older HV systems cannot be combined with one another.