Does the BP-1045, part number 11-17925, fit EBC-302-HM? Would I need one battery pack or two?
Per the supplier: Yes, it will fit. And you will need 2.
Will the MERL BP-1045 ELT battery pack fit the EBC-102A? PN# 11-17925.
Yes, this is the battery for the EBC 102, 102A, and 302. The 302V takes 2 of these.