Anyone purchase a Zero Export control or limiter? What was the outcome?

A number of companies are marketing ZERO EXPORT CONTROLS.... (Stand alone limiters for grid tie to not net meter)
Elgris is from Germany and Zed Advance from India, to name a few, Fronius markets one as well.
I believe all Zero Export device / Zero Export Controller / Solar Export Limiter require an energy meter at grid point with current transformers. We are single -split phase here 120/240v in the USA and some other countries like Philippines, I believe.
Curious if anyone has experience installing, configuring this system....
Comments
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-Lister ,
Supported GT inverters for Elgris (so far):
http://www.elgrispower.com/zero-export-solar-controller/
https://solar.schneider-electric.com/solution/residential-self-consumption/
http://members.sti.net/offgridsolar/
E-mail [email protected]