# What does the TÜV Nord certification mean?

Written by Karl Villanueva  
December 16, 2024

**[TÜV Nord](https://en.wikipedia.org/wiki/T%C3%9CV_Nord)** is a global certification institution based in Hanover, founded in 1869. Among other things, they certify that all the energy we procure at Ostrom is **[certified 100% renewable](https://cdn.prod.website-files.com/66842a7859add92820bb72af/66fab67b90812d9ab0222aae_222455%20Aplus%20Energy%20GmbH_VdTU%CC%88V_DE.pdf)**.