just run the docker in a small setup .. works even on a PI-3 .. than you will get all the data from Solis and receive your data all day long per MQTT
I tried to access via Solis API as well initially, but after a few weeks gave up and now using only the MQTT feed. The docker can also write directly into a influx-db .. your choice 
..it was faster to setup a docker than getting API running 
there was some discussion on this in 2024 ... have a look [here]
(Trying to get data from solis API - #2 by Steve-Mcl)
the final code at the time was here
