Engineering Recommendation G100 Declaration

SolaX Power Network Technology (Zhejiang) Co., Ltd. hereby confirms that X3-Hybrid Series inverter (the model shown as below) complies with the power meter (&CTs) recommended by SOLAX, Engineering Recommendation G100 Issue 1 2016, Technical Guidance for Customer Export Limiting Schemes, when installed in accordance with this Engineering G100 Declaration. (note: only Support EASTRON SDM630M power meter)

This Declaration should be read in conjunction with the inverter user manuals and meter quick installation guide.

Supported Models:

• X3-Hybrid -5.0-N-E, X3-Hybrid -6.0-N-E, X3-Hybrid -8.0-N-E, X3-Hybrid -10.0-N-E
• X3-Hybrid -5.0-N-C, X3-Hybrid -6.0-N-C, X3-Hybrid -8.0-N-C, X3-Hybrid -10.0-N-C
• X3-Hybrid -5.0-D-E, X3-Hybrid -6.0-D-E, X3-Hybrid -8.0-D-E, X3-Hybrid -10.0-D-E
• X3-Hybrid -5.0-D-C, X3-Hybrid -6.0-D-C, X3-Hybrid -8.0-D-C, X3-Hybrid -10.0-D-C

1. Introduction

Engineering Recommendation G100: Technical Guidance for Customer Export Limiting Schemes, published by the ENA, “defines the technical design requirements for Export Limitation Schemes which limit the net site export to below an agreed maximum and are installed on the Customer's side of the Connection Point”.

This document describes how a SOLAX X3-Hybrid Series inverter installation performs relative to key G100 requirements.

2. Description of Operation

G100 Requirement:

A description of the scheme, its settings, and a single line diagram should be permanently displayed on site.

SOLAX X3-Hybrid Series inverter can be set the export limiting power on the inverter LCD display based on customer or local rules requirements. SOLAX named this function “export control” on LCD display and it can be set from 0-300000W. This function means customer should install a meter (power monitoring unit) to monitor energy exported to or imported from the grid.

Note: Please see section 7 of specific LCD display operation.

System Operational States:

After setting the export limit power, the system switches between 3 operational states:

• Charging: X3-Hybrid charges when site-export is detected, to minimise electricity exported to the grid (loads less than solar generation).
• Discharging: X3-Hybrid discharges when site-import is detected, to minimise electricity import from the grid (loads greater than solar generation).
• Idle: No charge or discharge (battery full/flat or no solar/load).

A fundamental principle of this operation is that energy stored in the battery is only released to run loads within the building - at no time is the system attempting to export battery energy to the grid. This control is achieved by:

Meter (Power Monitoring Unit)

• The “Meter” - a power meter (& CTs) recommended by SOLAX.
• Measures power flowing in/out of the home and sends this data to inverter.
• Connected to the inverter via a communication cable.

3. System schematic

An X3-Hybrid Series inverter installation is shown as below:

X3-Hybrid: controls the AC output power according to the data from meter.

SOLAX Meter: Collects power data and feeds this data to the Inverter.

Diagram Description: A schematic shows the DNO supply connected through a fuse and main switch to a SOLAX Meter. The SOLAX Meter is then connected to an MCB, which feeds the Homeload. The SOLAX Meter also connects to an X3-Hybrid Inverter. The X3-Hybrid Inverter has connections for Battery and PV- PV+. The inverter and meter are also connected via a communication cable.

4. Component interconnection | Fail-safe operation

G100 requirement:

Where discrete units are used they should preferably be interconnected using metallic or fibre optic cables. Alternatively the units may be interconnected using secure radio links but where this is the case these links should be licensed (by OFCOM) and have a planned availability of 99.9% or higher.

Irrespective of the media used for interconnecting between the discrete units, if the communication path fails the generation output should be reduced to a nominal value stipulated by the DNO within a set response time to prevent the Agreed Export Capacity from being exceeded.

As shown in the diagram below, communication between all parts of the system can be wired.

Diagram Description: Two boxes are shown, one labeled "X3-Hybrid Inverter" and the other "SOLAX Meter". Arrows indicate a wired connection between them.

Unplugging or otherwise interrupting any of these wired connections, results in the system turning off. The system reaction speed under these conditions is less than 5s.

System fail-safe tests

See Annex A for test results

5. Response time

G100 requirement

The ELS must detect an excursion and reduce the export to the Agreed Export Capacity or less within 5 seconds.

Under normal operating conditions, X3-Hybrid Series response time is less than 5s.

Under loss of communications, or loss of power to Meter, response time is less than 5s.

6. Password protection

G100 requirement:

Once installed and commissioned, the scheme settings should not be capable of being readily altered by the Customer and should only be changed with the written agreement of the DNO.

All X3-Hybrid Series inverter export limit settings are password protected.

7. LCD display operation

Customer should set “export control” function on the LCD display. “Export Control” setting can be found according to path below.

Path: Menu ➔ Settings ➔ Advanced ➔ On-grid ➔ Export Control

Diagram Description: A flow chart shows the navigation path on the inverter's LCD: Menu -> Settings -> Advanced -> On-grid -> Export Control. A "Password needed" prompt is indicated before reaching "Export Control".

This value can be set from 0-300000W.

For example, if it is set 0W, it means no power can be exported to the grid; If it is set 4000W, it means the power exported to the grid can not exceed 4000W.

Example Setting:

Export Control

User value: 4000W

Mr Guo Huawei

R&D technical director

Date: 2019-01-26

SolaX Power Network Technology (Zhejiang) Co., Ltd.

No.288 Shizhu Road, Tonglu Economic Development Zone, Tonglu City, Zhejiang Province, China.