“I needed a true MPPT controller for my 50Ah 12V Lithium Iron battery, and this unit met expectations by feeding the battery with 10A from the panel's 28V 5A. The setup is simple with no battery drain when solar is off. Overall, beats everything else I could find, definitely a keeper.”
"Elejoy Solar Panel Tester is super vaulable for quickly identifying underperforming solar panels and ensuring they meet manufacturer specifications. It's worth every penny and highly recommended for anyone buying panels online."