New Stacked SW4048 won't work together
I purchased two new systems to stack together. I followed the installation and wiring instructions in the SW4048 manual for a Dual Inverter System Renewable Energy (Solar). I used two sets of Conext SW4048 inverter, MPPT60 Charger, 3k Solar Panels. I used 16 VMAX XTRD200 batteries wired for 48VDC. I used two Conext Battery Monitors. I stacked the units just like the manual recommended. I connected the DC circuits with two Conext DC switchgears. I connected the AC circuits to a Conext AC Switch-gear. I'm not using a generator, but wired the AC Switch-gear to the grid main panel. I installed a 100A Square-D sub-panel for my loads. I have an SCP and Combox installed. I followed the "Testing Your Installation", and every thing worked great. I configured for 240 Split-Phase. Everything seemed to work great until I tried to operate both SW4048 at the same time. I keep getting a fault "ID 72, Check AC Associations" no matter what order I start them in. I can set #1 as Master, them #2 as slave. As soon as I set #2 to Operate, both SW4048's fault out with same error. When I reverse the order (#1 Slave, #2 Master) the same thing happens. I can run either one by itself, but not both. I started with AC Associations: AC Out - AC Load 1, AC In - Grid 1. I tried several different combinations, but always get the same error. What am I doing wrong, or what can I check for? Any help you can provide would be appreciated.