A question on a solar system in Zimbabwe using an Axpert 5kva inverter. On some days and not others, around midday, the inverter switches from supplying solar power to using battery power. Come evening the pylon batteries are down to 3 lights. Zimbabwe at present only really receive grid power from around 10pm at night to about 5am the next morning. We have been through the settings on the inverter and made a few adjustments but have not sorted out the issue. Any advice would be much appreciated.