zappi 2.1 Multiphase Technical Bulletin

Firmware Update for 3-Phase zappi on Single-Phase Supply

Overview

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

Key Benefits

Expanded Monitoring

CT2 and CT3 can now be used on 3ph zappi when installed on a single-phase supply, enabling multiple energy circuits to be monitored simultaneously.

Auto-Detection

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

Enhanced Admin Portal Visibility

Improved visibility for monitoring and setup in the admin portal for single-phase installations.

CT Functionality

New requirements when installing a 3ph zappi on a single-phase supply:

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

Important: The CT setup must adhere to these new configurations for proper monitoring.

Product Labelling

A new label will be introduced, indicating that the zappi is compatible with both single-phase and three-phase supplies.

Technical Considerations

Transition from 3-Phase to a Single-Phase Installation

CT Auto-Adjustment

If all CTs (CT1, CT2, CT3) were set to the same group (none, generation, or storage), no changes will occur.
Example: Gen, Gen, Gen = Gen, Gen, Gen
If CTs are configured to anything other than the above, the system will automatically set CT1 as the primary option and none for CT2 and CT3.
Example: Grid, Grid, Grid = Grid, None, None

Transition from Single-Phase to a 3-Phase Installation

If one CT is set to an energy group and the other two are set to "none," the system will set all three CTs to match the active one.
Example: Grid, None, None = Grid, Grid, Grid
If all three CTs are already configured similarly, no changes will occur.
Example: Storage, Storage, Storage = Storage, Storage, Storage
If each CT is configured differently, all CTs will be set to "none," and the installer will need to manually choose and complete the setup.
Example: Grid, Solar, Battery = None, None, None

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