Data transfer from PG to SQL Server

Hi all,

I'm looking for the best way to transfer data on a weekly basis to a SQL
Server Instance which will be the staging area for BI reporting. A SQL
Server Linked Server configuration is because of security issues not
allowed so now I need some help!

What I did previously was installing the Postgres ODBC Driver 12_02
version, configuration is ok because a test is successful. So next step
was to configure a linked server and in that way I can see the tables. To
get the data from straigtforwarded tables without JSON or XML columns I
used openquery from SQL Server. That works for 80% of the tables. I also
see in the Postgresql logfiles that I'm connected and read that table.
Large tables (> 3GB) however did not transfer!
Also tried with Export/Import wizard from SQL Server Managememnt Studio but
also from SSIS. Both failed.

So my simple question is how to transfer Postgresql data/tables to SQL
Server without Linked Server or other paid tools like pgOledb? I could not
find answer so that's why I'm here!

Any help would be appreciated!

Best regards,

Paul van Rixel
DBA