Ich würde mal den Eintrag in der FAQ als Nein interpretieren:

Can I use Oracle Solaris 11 without a support contract?

Oracle Solaris 11 can be downloaded from the Oracle
Technical Network under the terms of the Oracle Technology
Network Developer Licensing Terms for Oracle Solaris which
permits for a perpetual license for the purposes of developing,
testing, prototyping and demonstrating applications on Oracle
Solaris 11. Oracle Solaris 11 can also be downloaded from
Oracle Software Delivery Cloud under the terms of the Oracle
Software Delivery Cloud Trial License Agreement which
permits a 30-day evaluation use only license for Oracle Solaris
11. In both the above cases, neither license permits for
production use. Customers will not receive updates to the
operating system unless they purchase a support agreement
from Oracle.