I'm currently designing an off-grid system with 2x MultiPlus 120/3000/70. The AC-1 outputs will be tied in parallel before feeding the main house panel. The MultiPlus manual states that an RCD is required on the AC-1 output, but I'm unclear on whether each MP requires a separate 75A RCD or if a single 150A RCD should be used to protect both.
My gut tells me that separate RCDs won't work because the current/load on each MP may fluctuate, but I've not had much luck finding a 150A RCD - it seems these are rare above 100A. I've read through the MP manual, Wiring Unlimited, the parallel/3phase install guide, and the Victron Professional site, and haven't found a good answer.
Thanks in advance for any insight :)
