Sungrow SH5K-30 混合逆变器 S100 电能表连接和测试指南说明书

2024年9月8日发(作者：盘文瑞)

S100 Energy Meter

Connection and Test Guide

Disclaimer

The material in this document has been prepared by Sungrow Australia Group Pty. Ltd. ABN 76

168 258 679 and is intended as a guideline to assist solar installers for troubleshooting. It is not a

statement or advice on any of the Electrical or Solar Industry standards or guidelines. Please

observe all OH&S regulations when working on Sungrow equipment.

The S100 Energy Meter is a vital component of the Sungrow hybrid system. The

Sungrow SH5K-30 Hybrid inverter comes supplied with an S100 Energy Meter. This

document uses an SH5K-30 inverter as an example for explanation.

The purpose of the Energy Meter is to:

a) Manage battery charge/discharge

b) Export control

c) Grid voltage sense for EPS function

The Energy Meter consists of three parts: The Energy Meter, the Current Transformer,

and an RS485 cable (Supplied in the inverter box). The Energy Meter is always

installed in the main switchboard.

Main switchboard

Energy Meter

RS 485PV

Current Transformer

Grid

Main Switch

Voltage

Connection

Arrow Points

To House

Inverter Supply

Battery

Emergency Loads

House Loads

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There may be an existing PV system on a sub board. Ensure that the energy meter

CT is between the grid and all loads / PV systems.

Mounting: Mount the Energy Meter in the main switchboard on the DIN rail

Current Transformer: The current transformer should be clipped over the consumer

main active cable on the primary side of the main switch. This location is both the most

convenient location and is the only point in which the total current can be measured.

The arrow must always point towards the house.

Voltage Reference Connection:

The Voltage Reference has two purposes:

a) to sense grid voltage, and

b) to convert the measured current into Watts.

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The location of the voltage connection is important. It needs to be between the

consumer side of the main switch and the primary side of all the sub circuits. This way,

the voltage will go to zero in the case of a blackout or the main switch is open. It should

never be able to be switched off by opening any sub-circuit switch.

The main purpose for this connection is so that when a blackout occurs and the SH5K-

30 goes into ‘Off-Grid’ mode, the Energy Meter will detect when grid re-establishes.

Never connect the voltage from the EPS circuits as it will cause the inverter to ‘cycle’

between grid and off-grid modes during EPS operation.

The yellow PWR/COM LED will be on steady if the voltage connection is correct. The

LED will pulse when communication with RS 485 is established. The red LED is the

watthour pulse.

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RS485:

A length of RS485 cable is supplied in the inverter box. The RS 485 cable sends the

data to the inverter so that the inverter can calculate the import/export and

consumption values. It uses this data to charge / discharge the battery bank.

If the cable run is longer than the supplied RS485 cable, Sungrow recommends you

use Shielded Twisted pair (RS485) cable only.

Example RS485 cable

Connect the white (A) to terminal 2 and the black (B) to terminal 5 on the Energy meter.

Connect white to A2 and black to B2 to the ‘Meter’ / RS485 terminals in the inverter.

(If using different colour code, ensure A - A2 and B - B2)

Note: If the RS 485 cable is over 50m, set the 120 Ohm terminator switch to the ‘ON’ position.

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Test the system

It is recommended that the energy meter be tested as part of commissioning so as to

avoid unusual readings or battery problems.

Always shut down any other PV systems as it may skew the readings in the test

phase.

Switch the Inverter and energy meter on and allow to go through start-up phase.

Check to see if the yellow LED is pulsing. If the RS 485 is not connected, the display

will show two dashes.

The data sent by the CT is shown on the top right icon on the LCD display

Display showing that RS485 is connected properly.

To check the correct polarity of the CT:

Method 1 - Switch off all house loads and the battery (if connected), and any existing

PV system and make sure the PV is generating. All the generation should export to

the grid.

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Method 2 – Key stop the inverter by going into the menu and selecting “OFF”. This will

stop the DC power without shutting the inverter down.

Switch some loads Oven, bar heater etc. This is to check import, so that it is

consuming from the grid. The LCD Display should look like this:

If reversed, double-check that the arrow on the CT is pointing to the house / loads, and

that ALL power cables are contained, and that the CT wiring is correct polarity (see

wiring diagram). Don’t forget to turn ‘Key start’ the inverter again.

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If the readings are incorrect, please double check the following:

• Is the CT arrow pointing towards the house?

• Is the CT clamped securely over the TOTAL current carrying conductor(s) for

the house?

• Is the reference voltage connected to the live at the main switch?

• Is the RS 485 cable connected properly and the correct polarity?

• If the RS 485 cable is longer than 50m is the 120 Ohm DIP switch in the ‘ON’

position?

• Is the DC voltage across RS485 A+ and RS485 B- about 4.5 V?

Note: Existing PV systems will show as energy flow from the house. In the below

example, you can see the surplus AC charge the battery (No PV input).

If the issue persists, please take photos testing on site and contact Sungrow Service

Department on 1800 786 476.

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