Jackery Parallel Communication Cable

With dual 3600 Pro Max units set up in a parallel configuration, when using 240V line input, the units lose the ability to switch to battery power quickly. They do switch, but each time, the two units need to sync to each other, which means your power is off for about 5 seconds. I am very disappointed with this behavior, as the documentation made it seem like the sub 10ms switching would still be applicable. Aside from that, the units seem to deliver as advertised.