Gardenroute

Morning. I have acquired a IVR 2400 mppt myself recently, and have experienced the same charging issues - seems the inverter can float the voltage, but when grid power is OFF, the batteries (series, 2 x 12V 96Ah deep-cycle), seems to drain faster after every grid-OFF session. I also tweeked the settings: Changed the (02 setting) (Battery type) , to ''USE''. I Increased the Floating voltage from 27,0 to 27,8V. It seemed to do the trick as it charges at 8-9 A, but after a week, the batteries seemed under-charged. I phone MUSTEK, Midrand (4th Aug 2023), and what the Techi said was: Settings menu: (02), must be on Afn, not USE. The USE setting is for Li-iron. I shall reset settings and try again.