I have a Mecer 5kva inverter and bsl batt 5.12kw litium ion battery. On two occasions I found on a hot afternoon that the system is running on the battery instead of solar. Then changed some settings according to advice on the forum but now the inverter is not charging the battery at all. Inverter little green light indicates fully charged but battery is empty. What are the correct settings for this inverter and battery? I suspect the settings I have changed now causes the problem.