Law, authorities and health
MaStR
Abbreviation for Marktstammdatenregister
In short and in plain language
The MaStR is an official list in Germany. It lists systems that make or store power.
A federal body keeps it.
Solar panels go on the list, for example. So do small solar units on a balcony and home batteries.
Definition
The MaStR is an official German register for systems that generate or store electricity. Solar systems, balcony solar units and battery storage, for example, are entered there.