What are you using for the solar charger? I have had problems with the t-beam where if voltage gets to low even if the solar charger gets the battery back up to voltage, the t-beam needs to be reset to set it to run.
Discussion
I have a battery discharge protection circuit which should address that. When the power gets too low it just cuts off to avoid that wonkiness.
I hope it works as well as advertised when the rubber meets the road. Also, I just realized that I soldered the wires on my battery harness without that circuit in there. Oops. Guess I'll get to do it over.
did you build the discharge circuit yourself, or did you purchase one. I am using these to charge my batteries:
https://www.amazon.com/gp/product/B082F7X8WS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I purchased them. https://www.amazon.com/gp/aw/d/B09YYH57WZ
And this is the MPPT board I bought: https://www.amazon.com/gp/aw/d/B08DY28BXW
I can't vouch for either of them since I don't have everything wired up and tested yet.