Electrically they are compatible with an appropriate plug convertor, but you also need to confirm that the RF frequency is allowed in Israel. There is a different frequency for the US and EU products.
According to Itsik
FreeNode-#linuxmce.log:Mai 23 09:25:33 <Itsik> it seems that z-wave frequency is reserved for military use ..
FreeNode-#linuxmce.log:Jun 01 22:21:45 <Itsik> well, not much, decided to go with plcbus for home automation as z-wave frequency is military here
FreeNode-#linuxmce.log:Jun 05 18:01:50 <Itsik> yep ... z-wave frequency is reserved for the militaryt here :(
Z-Wave is a nogo in Israel. (granted this is from 2008)