Application process for Master's program Energy Engineering and Process Engineering
Since December 01, 2020, the application
process for the Master's degree program in summer semester 2021 is
open. At this point, we want to inform you about some important
If you passed or will pass your primary university degree at a German university (incl. TU Berlin), please apply directly at TU Berlin.
For detailed info, see here: https://www.tu.berlin/en/studying/applying-and-enrolling/masters-application-enrollment/application/direct-application-to-tu-berlin-for-tu-graduates-only/ 
Applicants who completed their primary university degree (such as Bachelor’s/undergraduate degree) from a foreign university (EU or non-EU) or who are currently studying at a university in the EU and want to apply with an ECTS certificate must apply using uni-assist’s online portal. Uni-assist pre-evaluates your application to ensure it is complete and meets the general admission requirements of TU Berlin. Uni-assist charges handling fees for the processing and evaluation of each application which must be paid by the applicant. TU Berlin does not pay the handling fees of their applicants.
For detailed info, see here: https://www.tu.berlin/en/studying/applying-and-enrolling/masters-application-enrollment/application/applying-via-uni-assist/ 
In both cases, please hand in only electronic documents.