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We have a client with two Multigrid 24/3000 units in parallel and we need to upgrade it to three phase, is it possible to use a multiplus for the additional inverter or does it have to be a Multigrid, system is offgrid so the dual relays are not required?
https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems
All units need to be the same. A MultiGrid can't be used together with a normal MultiPlus.
You need to find another (used) MultiGrid or change all to new MultiPlus.
