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

**URL:** <https://community.victronenergy.com/t/how-to-connect-3-multiplus-ii-48v-3kva-for-split-phase-240v-and-parallel/31508>\
**Category:** Q&A and troubleshooting\
**Tags:** parallel, split-phase, victronconnect, multiplus-ii, diy, offgrid\
**Created:** [8 May 2025 03:45 UTC](https://community.victronenergy.com/t/how-to-connect-3-multiplus-ii-48v-3kva-for-split-phase-240v-and-parallel/31508 "2025-05-08T03:45:50Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![JamesNguyen](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/jamesnguyen/32/22826_2.png) [@JamesNguyen](https://community.victronenergy.com/u/JamesNguyen)\
**Post date:** [8 May 2025 03:45 UTC](https://community.victronenergy.com/t/how-to-connect-3-multiplus-ii-48v-3kva-for-split-phase-240v-and-parallel/31508/1 "2025-05-08T03:45:50Z")

</div>

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. A tech-support mentioned the Multiplus units must be within 6 months of manufacturing (Same SN) to allow the sync. Is this a MUST requirement?
2. Combining 3rd Inverter L1 to an L2 (120V) as parallel in the same Panel is correct?
3. Any special wiring required?