I’m in Central America and have a Victron system with solar, batteries, and 2 MultiPlus-II units. Several months ago I was running into an issue where VRM would show the grid voltage constantly cycling up and down and AC loads also ramping up and down to thousands of watts. I asked on the old community site, and I was pointed to LOM detection issues likely caused by a high impedance connection to the grid. The installer disabled ESS and set up Virtual Switch Ignore AC which resolved the issue, but now I’m not able to charge batteries from the grid, use scheduled charging, and other ESS features.
It sounds like the real solution to this problem is to install the Ziehl anti-islanding box (Anti-Islanding Box 63A single and three phase | Victron Energy) and then turn off LOM detection, I assume?
How is the grid detection different on the Ziehl box, and can I be confident that won’t have the same LOM issues the ESS was having?
Should this be easy for an installer to set up, or is there some advanced configuration required (I assume this is something they haven’t done before, since it’s a smaller company/country).
Thanks!