DK,
Note : E_HANAINS* is lower level when compared to C_HANATECH*
The latest is SP09
E_HANAINS151 : SAP Certified Technology Specialist - SAP HANA Installation (Edition 2015)
My suggestion for next level you should target,
C_HANAIMP151 SAP Certified Application Associate - SAP HANA (Edition 2015)
All the best
regards,
Rv