I am using this on a medium/small solar system, I have two 320w rooftop solar panels, two Battleborn LiFePO4 batteries in a 12v configuration and a 2000w Renogy -Pure sine wave inverter. This charge controller was easy to set up, I replaced a much cheaper similar sized charge controller with this unit. It seemed much more substantial and, as I said, the setup was simple. First I connected the batteries, then connected the solar panels, the charge controller did most of the setup, I just had to adjust a few parameters. I also added a Bluetooth module so I can see what's going on remotely. My batteries charge FAST, even on cloudy days. I highly recommend it, I'm very happy with it.
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