How to connect 3 Multiplus II 48V, 3KVA, for split-phase (240V) and parallel

Q&A and troubleshooting
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My DIY off-grid system I am interested with this requirement and form with this configuration:

REQ:

  1. Provide 6KW 240V AC
  2. Provide 6KW 120V AC

CONFIGURATION:

  1. |2x MP-II (Split-Phase)|6kVA (240V)|Standard North American split-phase.|
  2. |+ 3rd MP-II (Parallel)|+3kVA (120V)|Extra 120V circuits (or 240V if phased correctly).|

The AC wiring are

  1. AC Output Wiring:
  • Split-Phase Pair (Inverters 1 & 2):
    • Inverter 1 (Master) L1 → Load Panel L1
    • Inverter 2 (Slave) L2 → Load Panel L2
    • Neutral (N) → Shared between both inverters
  • Third Inverter (Single-Phase):
    • L1 → combine with L1/L2 on the Load Panel).

B. Victron Configuration (Using VE.Config or VictronConnect)

  1. Configure Split-Phase Pair (Inverters 1 & 2):
  • Inverter 1: Set as “Split-Phase Master (120/240V)”.
  • Inverter 2: Set as “Split-Phase Slave”.
  1. Configure Third Inverter (Parallel Single-Phase):
  • Set as “Parallel (Single-Phase)” → Assign to L1 or L2 (depending on need).
  • Adjust current sharing in settings.
  1. PowerAssist & Current Limits:
  • Set max AC input current (e.g., 50A for generator support).
  • Enable “Weak AC Input” if using a generator.

QUESTIONS:

  1. Is this a supported configuration?
  2. Combining 3rd Inverter L1 to an L2 (120V) as parallel in the same Panel is correct?
  3. Any special wiring required?