Yes, it is possible to connect two SRC3KUXI ups in parallel by using redundant kit
called SRCPK0203.
Note: Parallel system SRCPK0203 works with only two identical UPS models of SRC2KUXI or SRC3KUXI
Types of batteries can be connected with SRC3KUXI: Sealed Maintenance Free (SMF) / Valve
Regulated Lead Acid (VRLA) type, Flooded / tubular / vented type.