I actually haven't used this yet, after a lot of research, reading and watching videos, this is one of the real mppt solar chargers, there are many of them will even advertised as MPPT on Revain, read in the ad that it is not a true MPPT charge controller. Most of them are PWM which work but are not very efficient. You can usually find videos on YouTube. So if you want to try checking YouTube there are some great videos of these guys taking them apart and proving they aren't MPPT controllers. If it's cheap, it's not an MPPT. A real MPPT charge controller is much more efficient than PWM charge controllers, I give it four stars mainly because it's a real MPPT controller, once I use it I will update the rating.
Keep Your Battery Fully Charged With A Smart 12V Charger/Maintainer Featuring Winter Mode
28 Review
Case Compatible With Halo Bolt Portable Car Battery Jump Starter 58830/44400/57720 MWh Charger. Power Bank Holder For Halo Power Station 100/For AC Outlet.(Not Fits For Halo Bolt Air, Box Only)
24 Review
Xiaomi 70mai Jump Starter Midrive PS01
120 Review
CARKU Pro-10 black/red
91 Review