Conext SW4024 - AC Support Performance
I've just set up a Conext SW4024 on a 24V battery bank and 1.6kW of panels. My house normally draws around 700W, and I'm finding that AC support is only covering about 300-400W of that. During full sunlight my panels are generating in excess of 1kW, so I find the inverter is very rarely able to hold the battery voltage at the AC support voltage.
Some reading has shown that I should have checked the fine print a bit better. The AC support for the SW only supplies the common current between L1 and L2, so if the currents are off balance at all then that will be made up by grid power.
I did a firmware update, hoping that new software might be better. No luck there. I was trolling through all of the settings on the combox and found an "Inverter Mode" option, and my inverter is current set to "Split Phase Master". There's an option for "Single Phase Master". I can't find any reference to this setting in my user manual. Does anyone know what this does? Will this change the output to be a single phase? Will this help the inverter with AC support since there is no longer L1 and L2?
Alternatively, does anyone know of any methods to improve the AC support for the inverter? I've already tried to balance L1 and L2 as best as possible by moving around some breakers, but I usually have a 2A or more difference between the phases, resulting in a lot of power being consumed from the grid needlessly. Even if it were possible to disable grid power when the battery voltage is above a certain level, that would be pretty neat, but I don't see any option for that.
Thanks for reading,
6x Jinko 260W Panels (1.56kW), Conext SW 4024 Inverter, Morningstar ProStar MPPT 40A Charge Controller, 8x 220Ah 6V Flooded GC2 Batteries (4 per string, 2 strings in parallel for 24V 440Ah), MidNite Solar Combiner