Cheap(est?) Lithium MPPT Solar Charge Controller CN3722 - 12v Solar Shed

I've been trying to find the cheapest solar charge controllers the internet can provide for a little while. In previous videos I've been able to recommend some really cheap PWM solar charge controllers but the cheap MPPT versions have been fake. This time however I think I may have come across something which could be classed as Maximum Power Point Tracking.
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CN3722 Lithium MPPT Charge Controller: ebay.us/mTXQBE
CN3722 Datasheet: admw.uk/j5
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