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zappi 2.1 Multiphase Technical Bulletin

This update enhances the functionality of the 3-phase zappi when installed on a single-phase supply, enabling the use of CT2 and CT3 in addition to CT1. Previously, only CT1 was operational for single-phase setups, limiting monitoring capabilities. With this update, all three CTs can monitor additional energy sources, such as solar, load, or storage circuits, in single-phase installations.

Overview

Expanded Monitoring

Firmware Version is 5.557 - Click here to see the release notes. 

Expanded Monitoring
With this update, CT2 and CT3 can now be used in 3-phase zappi installations on single-phase supplies. This enables the simultaneous monitoring of multiple energy circuits, providing more comprehensive data and management.

Auto-Detection
The zappi now automatically detects the supply type (single-phase or three-phase) and adjusts CT functionality accordingly (see "Technical Considerations" below).

Enhanced Admin Portal Visibility
Monitoring and setup options for single-phase installations are now more visible and manageable in the admin portal.

Key Benefits

When installing a 3-phase zappi on a single-phase supply, please note the following configurations:

  • CT1: Bi-directional readings.
  • CT2: Uni-directional readings (typically used for generation or solar monitoring).
  • CT3: Bi-directional readings.

Important: The CT setup must follow these new configurations to ensure proper monitoring.

CT Functionality
A new label will be introduced, indicating the zappi’s compatibility with both single-phase and three-phase supplies.

Product Labelling
Transitioning from a 3-phase to a single-phase installation will be clearly indicated in product documentation and labelling.

Technical Considerations

CT Auto-Adjustment

  • For configurations where all CTs are set to the same group (e.g., “none,” “generation,” or “storage”)

    • The system will not make changes.
    • Example: Gen, Gen, Gen = Gen, Gen, Gen

  • For configurations with mixed settings

    • The system will automatically set CT1 as the primary CT and configure CT2 and CT3 as “none.”
    • Example: Grid, Grid, Grid = Grid, None, None

Transition from Single-Phase to 3-Phase Installation

  • If one CT is set to an energy group and the other two are set to “none”

    • The system will match all three CTs to the active one.
    • Example: Grid, None, None = Grid, Grid, Grid

  • If all three CTs are already configured identically

    • No changes will occur.
    • Example: Storage, Storage, Storage = Storage, Storage, Storage

  • If each CT is configured differently

    • All CTs will reset to “none,” and the installer must manually choose and complete the setup.
    • Example: Grid, Solar, Battery = None, None, None