Is it possible to setup e-mail notifications/alerts from the MyMidnite website to alert me when my battery SoC is low?
I don't think so - never heard of that before anyway.
Best you could do to set something like that up would take a bit of geek work - set up raspberry pi for MQTT ( look in open source section of the forums) , then use Node Red to take the data and you can set that up to do notifications via email or text .
Larry