DoubleH

270w. 3 arrays of 3.

Hi. Member for a while but this is my first post. I got a small system going at the beginning of the year to power up lights, TV etc during outages. Axpert 5Kva invertor, 9 panels and 8 x 102ah deep cycle batteries for the 48v ask. My issue is that despite the relatively low load of between 500 and 700 watt, the batteries simply does not last - sometimes not even the 2,5h loadshedding slots in Pretoria. Although I have forgotten most of my matric science lessons, this bank should last longer than what it does. The invertor manual supports this thought. I have charged all 8 batteries individually and they all read around the 12,8v mark when done. But as soon as it gets load the volts drop like a countdown timer! Any experts out there than can assist me finding a solution to this?