---
title: "How can I make a Bi-Phase System with xtender?"
description: "There is an electrical supply configuration called bi-phase. It is made of a common neutral and two phases of 120V but with phase shift of 120 degrees. There is a total voltage of 208V between the two phases that can…"
url: "https://studer-innotec.com/support/faq/xtender-inverter-chargers-series/configuration/how-can-i-make-a-bi-phase-system-with-xtender/"
updated: "2026-06-25"
category: Configuration
tags:
  - energy management
  - phases configuration
  - xtender series
  - xtender xth inverter
  - xtender xtm inverter
  - xtender xts inverter
---

# How can I make a Bi-Phase System with xtender?

There is an electrical supply configuration called bi-phase. It is made of a common neutral and two phases of 120V but with phase shift of 120 degrees. There is a total voltage of 208V between the two phases that can be used to supply 208V loads.

![phase sheme](https://studer-innotec.com/wp-content/uploads/2024/08/download-15.png)

This system is done with 2 xtenders 120V to have a 208V at the output. To the AC-input a biphase system must be applied. They are wired as follow:

![xtender](https://studer-innotec.com/wp-content/uploads/2024/08/download-16.png)

In order to complete the configuration. You must

- Adjust Phase Selection Jumper in each xtender:
  - xtender 1: L1
  - xtender 2: L2 (L2 with 120 degrees phaseshift)
- Adjust parameters with rcc:
  - "Inverter frequency" {1112}:  60Hz
  - 3-phase integral mode {1283}. NO. If this parameter is enable, the system is checking for a 3-phase system and if a phase is missing, then the system does not work.