Remotely Monitoring BASIC 12v Solar System, Why is there not an easy solution for this???

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At $180 this is the cheapest packaged product I could find that seems to meet your needs. It has wifi and RS485, so lots of options for accessing the data.

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.