This was my experience with renogy support:
- Went to their contact page on the website and filled out the "submit a ticket" form, including attaching pictures.
- 7 days later "Thanks for contacting renogy support, those pictures didn't come through on the online form, can you send them via email", replied to that email on the same day.
- 12 days later "Thanks, we received the photos. While we check can you please send through a copy of your receipt", replied with a copy of my invoice.
It's now been more than a week later and I still haven't heard anything back from them (Not even a "try turning it off and on again").
So almost a month an absolutely no meaningful or helpful response. It seems that if you have a technical question or issue it gets put into the "too hard basket" and simply ignored.