Lots of such devices probably are talking 'to the outside world', just not in a way that benefits the owner. They're likely data-mining us via peer-to-peer mesh networking that doesn't rely on your actual wifi if there are other 'compatible' radios within its own range (i.e. neighborhoods).
You should see if it's compatible with Solar Assistant.
A victron 100/50 charge controller and cerbo gx is within $100 difference compared to the renogy stuff and you get way better quality and no $30 annual fee. Seems like a no brainer to me.
I definitely wanna try it out soon.
www.tyconsystems.com
Exactly what do you want to monitor; do you just want instant data, single day aggregation, or multi-day history? Just battery voltage, or do you want to see charge and discharge energy as well? Do you just want enough to know there is a problem *now*, or do you want to predict when you migh thave an issue in the future?
You can take a snapshot periodically and mail it to yourself, mail will also retry a few times in case you lose connection so you will get the data eventually.
I bought one. It was a massive piece of shit and didn't work. Renogy advertises it as having RS485, but that was a joke, tech support wanted me to spend another $60 on a bluetooth adaptor and then bluetooth into the M1. Then it wouldn't connect to wifi, even though my laptop and phone both did, for zero reason, and then once i got it working after fucking HOURS of wasted time, I found out it doesn't even show battery percentage, even though the charge controller does. Fuck Renogy, never again, trash company.
