Review on KNACRO MPPT Solar Charge Controller Regulator with Digital Display and Adjustable Voltage for 12-60V Systems up to 90V – Ideal for 24V, 36V, 48V & 72V Battery Charging (12-60V) 0-10A by Rusty Heredia

I ordered one of these controllers and it worked most of the time so I ordered three more. From the four articles I have had the following experience: The first controller arrived in about 1-2 weeks. The three remaining controllers got lost on the way (from China) and it took me almost 8 weeks to finally get them. work fine with one exception, see below for more information. The 2nd fan was off upon arrival. The 3rd fan ran for about 3 weeks before it failed with a lot of noise. The 4th block just turns off no matter what settings I choose. regardless of battery charge, charge controllers do NOT turn on automatically in the morning when the sun rises. In other words, if you don't click OK in the morning, the controllers won't turn on and your batteries will NOT charge. And finally, the MANUAL is written in an absolutely HORRIBLE translation from Chinese to English, and that's not correct. So you'll have to experiment to figure out how to make changes. I've spent hours and hours trying to get it to work with very little success. Don't waste your money, spend a little more and get a product "Made in the USA".