Review on 🌞 Intelligent 30A Solar Charge Controller for 12V/24V Solar Panels with Dual USB Ports, LCD Display, Timer Setting, and Adjustable Parameters for ON/Off Hours by Nick Walker

I think this product charged my batteries in my RV but I could never tell how fast. The photo shows that it shows amps but I could never find a way to change the display to that option (all I saw was volts on one screen and a screen flashing rapidly between two different volt readings at another time - another user reported that he only saw amps). I was traveling and was unable to contact tech support due to short cellular coverage. I strongly recommend companies to expand their manual beyond one page of a small piece of paper (the other page appears to be in Mandarin or some other Chinese dialect) and have it read by a native English speaker prior to production. I will return my device and buy a more expensive controller with better documentation.