Review on 🌞 Newpowa 10A MPPT Solar Charge Controller for 12V Battery with LCD Display, Dual USB Ports, Negative Ground - Ideal for Gel AGM and Liquid Batteries, Off Grid Solar Panel Charger - Up to 130W by Anthony Woolley

Performance and specifications were excellent. Power Point Tracking (PPT) was 99.77%. The panel generated 20.4 volts at 5.3 amps. The controller output 12.4 volts at 8.7 amps to the battery. I would say that a 99.77% conversion rate is pretty darn good. I only have one issue with the controller, (1) it doesn't have a backlight, making it difficult to see in bright sunlight or in the dark; (2) The user interface is clunky and you should always keep the manual handy for reference. My controller gave an error E3 (low battery voltage) about 1/2 hour later when I loaded my inverter with 900W. The controller has stopped supplying power to the battery. Once I removed the power inverter load from the controller to the battery. Good security feature. Very happy with performance and performance.