geiger has been the father of e-ppg worldwide since 2006. i have had a lot of contacts with users of the products since 2010.
the specialty is that geiger has a system that communicates internally with all parts. the esc knows how often the battery has been charged and how good its health is. as an an example. Geiger also equipped large aircraft. i was at a big meeting in 2017. a flying wing swift was towed here with e-trike. with more performance than comparable rotax systems.
https://www.geigerengineering.de/en/avionics/products
https://www.geigerengineering.de/avionik/referenzen
another company where i see very good potential in the future. I can’t post any long-term experience here.