Battery won't charge

Hi, my BYD lvs 8.0 will not charge automatically. All the settings are the same as on my other systems. The only time it will charge is when I manually discharge the battery for approx. a hour or so. Then it goes to 100% and after reaching this it drains slowly. I also tried a gridd code with ESS keep batteries full, no success.
Firmware 3.52. No solar. Setup as backup. Grid connected and only critical loads.