I have a MTTP 100/20 controller charging a 100Ah LIFE PO4 12V battery from a 120W 24V panel. In full sunlight a get a maximum of about 75W. The Bluetooth app says that I am in bulk charge but the blue LED on the MTTP is blinking. The manual says a blinking light means that the unit does not have enough solar energy to change the battery. The battery will eventually charge but it seems to be slow often taking more than a day under minimum load conditions. Why is there a conflict between the blinking blue LED and the power intake of the battery? Shouldn't I be getting closer to 120W of charge?