Review on ⚡️ EPEVER MPPT Charge Controller 30A 12V/390W, 24V/780W, Common Negative Grounding, Maximum PV 100V LCD Display for Lead-Acid Sealed/Gel(AGM)/Flooded and Lithium Battery Charging (MPPT 30A) by Jerry Delozier

If you have lithium you need to learn. Once I understand that, using the laptop monitor program is fine and everything works fine. I had a little problem with the chart not adjusting to the max voltage (1st pic) and I don't know why it worked one day (I think it was a reboot) but it did (2nd pic ). For about a year the whole thing was just tossed around a few months ago.