Huayu Hyh-7.6k-na/pro User manual

For our home energy independence.

Huayu(Ningbo)New Energy Technologies Co., Ltd.

USER MANUAL

Huayu Hybrid Inverter

HYH-7.6K-NA/Pro

HYH-8K-NA/Pro

HYH-9K-NA/Pro

HYH-10K-NA/Pro

HYH-12K-NA/Pro

6. 

Troubleshooting & Maintenance 30

7. 

Fan Replace 34







30

31

6.1.1 Introduction to LED Displays

6.1.2 Maintenance

6.1.3 Troubleshooting Based on LCD Displays

 30

6.1 Troubleshooting

Safety

1. 



01

Contents

1.1 Safety Instruction

2.

3.











Brief Introduction

Installation 04

4. 

Operation Guide 21

04

06

03

3.1 Packaging List & Storing

 214.1 Operation Mode

 214.2 LCD Settings

 27

4.3 Huayu Portal Monitoring Platform

 274.4 Parallel System Setup Guidance

3.2 Select Location

3.3 Install the Inverter

 07

3.4 Connection







07

08

09

3.4.1 Connection Overview

3.4.2 PV Connection

3.4.3 Battery Connection





21

23

4.2.1 Information Searching

4.2.2 Settings Guidance

 10

3.4.4 Communication Connection



12

14

3.4.5 US Model Grid/UPS Connection



3.4.6 Work with Gen Set

15



3.4.7 European Model Wiring Diagram

19



3.4.8 Meter and CT Connection 17



3.4.8.1 Connect the Meter

 032.1 System Solution

18



3.4.8.2 Connect the CT

14



3.4.5.1 240V Single-phase Connection 13



3.4.5.2 240V/208V Split Phase Connection

19



3.4.8.3 DRMs Connection

20



3.4.8.4 Balancing Resistor Configuration - SW1

20

3.4.8.5 Wireless Communication Module Connection 

Start-up and Shut Down the Inverter

5. 





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5.1 Start-up the Inverter

5.2 Shut Down the Inverter

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1. Safety

1.1 Safety Instruction

General Safety Instructions

Important Safety Notifications

The inverter has been designed and tested strictly according to international safety regulations. Read all

safety instructions carefully prior to any work and observe them at all times when working on or with the

inverter. The operator must be qualified personnel and the installation must be capable with relevant

national or international standards or regulations.

Dangers of High Voltages and Large Current

Beware of high PV voltage. Please turn-off the DC switch of PV Panel output before and during

the installation to avoid electric shock.

Beware of high grid voltage. Please turn-off the AC switch of grid connection before and during

the installation to avoid electric shock.

Beware of large current of the battery output. Please turn-off the battery module before and

during the installation to avoid electric shock.

Do not open the inverter when it's working to avoid electric shock and damages from live voltage

and current from the system.

Do not operate the inverter when it's working, only the LCD and buttons can be touched in

limited cases by qualified personnel, other parts of the inverter can be touched when the inverter

is under a safe state(e.g. fully shut-down).

Do not connect or disconnect any connections(PV, battery, grid, communication, etc.) of the

inverter when it's working.

Make sure the inverter is well grounding, an operator should make sure itself is good protected by

reasonable and professional insulation measurements (e.g. personal protective equipment (PPE)).

Inspect relevant existed wiring on-site of the installation is under good condition before

installation, operation or maintenance.

Inspect the connections are good between inverter and PV, battery and grid during installation

to prevent damages or injuries caused by bad connections.

There are many safety issues need to be carefully notified before, during and after the installation, and

also in future operation and maintenance, following is important safety notifications to operator, owner

and user of this product in appropriate usage.

Incorrect operation or work may cause:

Injury or death to the operator or a third party; or

Damage to the inverter and other properties belonging to the operator or a third party.

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02

All the warning table or nameplate on the inverter must be clearly visible and must not be removed,

covered or pasted.

The installation should choose a right position and location as required in this manual with consideration

to safety of users' in future operation.

Please keep the children away from touching or misoperation the inverter and relevant system.

Beware of burning hurt, the inverter and some parts of the system could be hot when working, please

do not touch the inverter surface or most of the parts when they are working. During inverter working

states, only the LCD and buttons could be touched.

Please carefully read this manual before any work carried out on this inverter, after the installation,

please keep this manual carefully stored and easy to access at any time.

The qualified personnel should have had training in the installation and commissioning of the electrical

system as well as dealing with hazards, also they should have the knowledge of the manual and other

related documents. As the installer or operator they are required to be familiar with local regulations

and directives.

Avoid Misoperation and Inappropriate Usage

All the work of this product(system design, installation, operation, setting configuration, maintenance,

etc.) must be carried out by qualified personnel as required.

All connections must be in accordance with local and national regulations and standards.

Only when permitted by utility grid, the inverter and system can interconnected with the utility grid.

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2. Brief Introduction

2.1 System Solution

This product and relevant system is suitable for following system applications (system diagram):

Grid

Router

A. Solar and energy storage hybrid system B. Energy storage system without solar

C. On-grid solar system without battery

(hybrid ready)

D. Off-grid and back-up applications

E. Hybrid system with zero export funtion F. Parallel system for MG model

Reserved

Battery&UPS

Interfaces

Huayu Power Viewer

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3. Installation

When the packaging is unpacked, the inner components should be the same as described in below

packaging list.

Hybrid Inverter X1

User Manual X1 Communication

Port Cover X4 Data logger X1

Meter X1

CT X2 RJ45 Terminal X4

Expansion Screw

and Tube X4

Cross Head

Screw X6 OT Terminal X2

Battery

communication cable

RSD

3.1 Packaging List & Storing

3.2 Select Location

Packaging List

a) The wall for mounting should be strong enough to bear the weight of inverter.

b) To ensure the heat dispassion efficiency and inverter lifespan, do not install the inverter enclosed.

Suggestions and Requirements

400mm

400mm 400mm

400mm

Forour home energy independence.

Huayu(Ningbo)NewEnergy Technologies Co., Ltd.

USER MANUAL

Huayu Hybrid Inverter

HYH-7.6K-NA-Pro

HYH-8K-NA-Pro

HYH-9K-NA-Pro

HYH-10K-NA-Pro

HYH-12K-NA-Pro

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05

>75 90 >90 90

c) The structure of the wall where inverter mounted should not be flammable, or make sure the inverter is

not surrounded by flammable or corrosion materials and is away from the gas.

d) Never install the inverter exposed to directly sunshine, rain and snow. Please refer to below figure and

select a well shaded place or install a shell to protect the inverter from directly sunshine, rain snow, etc.

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3.3 Install the Inverter

The inverter is wall-mounted installed, steps shows below:

Step 1. Use the cardboard as the template to mark the position of the 4 holes, then drill 8 mm holes and make

sure the depth of the holes is deeper than 50mm.

Step 2. Install the expansion tubes into the holes and tight them, then use the expansion screws (packaged

together with the expansion tubes) to install and fix the wall-mounting bracket on the wall.

Step 3. Install the inverter on the wall-mounting bracket and lock the inverter using the security screws.

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3.4 Connection

3.4.1 Connection Overview

The system connection diagram is as below:

Please prepare the breakers before connetion, breakers selection recommendation for both DC and AC.

Connection Terminals and Interfaces Overview

DC Breaker Selection(6 poles)

AC Breaker Selection(2 poles)

UPS Breaker Selection(2 poles)

600V/40A

63A/230Vac

63A/240Vac

HYH-12K-NA/Pro

Type AC,>0.3A

HYH-7.6K/8K-NA/Pro

HYH-9K/10K-NA/Pro

AC Breaker with RCD

DC Breaker Selection(2 poles) 100V/300A

600V/40A

50A/230Vac

Type AC,>0.3A

100V/300A

600V/40A

40A/230Vac

Type AC,>0.3A

100V/300A

Hybrid Inverter

UPS L oad

L 1 L 2 L 1 L 2 L 1 L 2

L1

L2

Huayu Meter

DC Switch

PV INPUT BAT INPUT

WIFI

COM

AC OUTPUT

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3.4.2 PV Connection

Cable DiameterCross-section Minimum Voltage

4 - 6 mm

2

2.5 - 4 mm 600V

Cable Requirement:

Assemble the PV Connector

d) Route the PV input power cable through the conduit and then fitting of the pipe.

e) Connect the PV input power cable to the terminal block. Connect positive pole(+) of connection

cable to positive pole(+) of PV input terminal block, connect negative pole(-) of connection cable

to negative pole(-) of PV input terminal block.

a) Strip 6-8 mm insulation from the cable end.

b) Assemble the cable ends to crimp contacts.

c) Secure the pipe fitting to the enclosure using the nut provided with the pipe.

g) Checks that the cables are connected correctly and securely. Then take appropriate measures to

ensure that the pipe conduit and fittings are secured reliably, and seal the cable holes.

f) Secure the fitting to the conduit.

The PV connection of Huayu hybrid inverter is the same to traditional on-grid solar inverter (string inverter).

Before connection the PV, please use the multi-meter to measure the PV array voltage to verify if PV array is

working normally, if not, please fix the PV array to normally working states before connection.

When your PV panel ambient temperature could possibly be lower than 0℃, then please check the PV array

voltage up ceiling and if you are not sure please ask your system or panel provider for further assistance.

As when temperature is extremely low the PV panel voltage will increase by a certain percentage.

Turn off or disconnect the PV switch(DC witch). Then keep this switch always open during the connection.

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Please pass the positive lead of

PV through the AFCI module,

and pass the negative lead of PV

through the RSD communication

magnetic ring first.

09

3.4.3 Battery Connection

Cable Requirement:

Cabel DiameterCross-section Minimum Voltage

50-60 mm

2

15-25 mm 600V

Model

5-8K

9-10K

11-12K

60- 85 mm

2

85- 100 mm

2

15-25 mm

600V

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Step 1:

Strip 6-8 mm insulation from the cable end

and assemble the cable ends to crimp contacts.

Step 2:

Route the battery power cable through

the conduit and then fitting of the pope.

Step 3:

Secure the pipe fitting to the enclosure using the nut provided with the pipe.

Battery Communication Interface

CT and Meter

Communication Interface

Parallel Cable

Communication Interface

DRM Interface

Temperature Sensor

Serial Communication

Mains Model

CAN Matching Resistance

Dry Node

3.4.4 Communication Connection

Interface Overview

Polarity reverse will damage the inverter!

Install a DC isolator between battery and

inverter can avoid potential damages

caused by electric arc.

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1

Function Description

2

3

4

BAT 485 B

BAT 485 A

BAT CAN L

BAT CAN H

5

6

7

8

N C

BAT NTC

BAT Wake UP

GND-S

Pin 1 2 3 4 5 6 7 8

RJ45 Terminal Configuration of Battery Communication

If the battery type is lithium-ion or ternary battery which need communication between the inverter and battery

management system (BMS), the communication connection must be installed.

Make the RJ45 terminal based on above introduction of each Pin definition, you could either make RS485

connector or CAN connector based on the best support connection way of your battery packs.

For Lead acid battery temperature sensor, please connect signal to Pin6 and Pin8, the other pins are not

connected.(External temperature sensor is needed, the sensor is 15KΩ thermistor for typical, or consult

Huayu New Energy).

Battery Communication Connection

For Li-ion Battery

If work with lithium battery, please make sure it is compatible with the Huayu units. Now Huayu inverter is

compatible with Pylontech, Dyness,Weco, Murata.

After battery power cable and communication cable connection, users need to choose battery brand by LCD.

Please remember to connect Master battery to inverter if you have battery group, and set the Master battery

for the battery group.(Please contact battery manufacture for battery group setup).

For Lead-acid battery

The lead acid battery temperature sensor cable is optional, if required, please request the temperature

sensor cable from your supplier.

There are three stages for lead acid battery charge. For charge part, please set CV voltage and floating

voltage. For discharge part, please set the discharge cut off voltage for on grid and off grid.

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Note: The DIP switch is composed of five-digit binary number

PINs. Each PIN has two status, when set upward to“ON”, its

value turns to“1”, when set downward, its value turns to “0”.

By configuring the DIP switch the inverter could comply with

different grid system.

Sw2 Safety Standard Configuration Switch Overview

Grid Type Configuration - SW2

Voltage Standards Configuration Guidance

Cross-section Cable Diameter

Cable Requirement

3.4.5 US Model Grid/UPS Connection

Minimum Voltage

8 - 10 mm

2

5-10 mm 600V

d) Secure the fitting to the conduit.

a) Strip 8-10 mm insulation from the cable end.

b) Assemble the cable ends to crimp contacts.

c) Secure the pipe fitting to the enclosure using the nut provided with the pipe.

e) Checks that the cables are connected correctly and securely, then take appropriate measures

to ensure that the pipe conduit and fittings are secured reliably, and seal the cable holes.

Assemble the Battery Connector

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Main L is connected to terminal L1, mains N is connected to terminal L2, and the machine output

N is connected with air switch and mains N; the schematic reference is as shown in the picture below.

Connect the power L line of the important load or equipment to the UPS port output L1, the N line to the

UPS port output L2, and the PE line to the inverter and other equipment. Schematic reference is as follows.

3.4.5.1 240V Single-phase Connection

EPS Connection

240V Grid Connection

Grid Type

24 0V Spl i t Pha se

24 0V Si ngl e Pha se

Sw2 ConfigurationVoltage

20 8V Spl i t Pha se

L N

L1 N L2

L2

N

L1

PE

N

240V

L

N

L

P E

PE

120V 240V

L1

L2

N

120V

NL

PE

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3.4.6 Work with Gen Set

The split-phase system applicable to this series of Hybrid products includes 240V mains power with a phase

angle difference of 180 degrees and 208V mains power with a phase angle difference of 120 degrees. For

split-phase systems, please connect L1 to the inverter Grid port L1, L2 to the inverter Grid port L2, and N to

the inverter port N. Schematic reference is as follows.

This hybrid inverter can work with generator.

Users can connect the generator output to inverter GEN terminal.

Please purchase an external control box to remote turn on/off the generator(which support dry contact function).

The generator will be automatically started when battery cannot discharge or there is charge request from battery.

When battery can discharge and SOC is higher than AC charge SOC setting, generator will be stoped.

Battery will get charged when the generator is turned on, and the generator is bypassed to take all loads in

UPS terminal.

3.4.5.2 240V/208V Split Phase Connection

240V/208V Split Phase Grid Connection

For 240V or 208V loads or equipment, please connect the power supply L1 and L2 to the UPS output L1 and

L2 respectively, and the PE wire to the inverter and the equipment used. For 120V loads or equipment, please

connect the L line of its power supply to L1 or L2 of the UPS output, and connect the N line of the equipment

power supply to the N of the UPS output. Schematic reference is as follows.

EPS Connection for Split Phase

3.4.7 European Model Wiring Diagram

Single-phase Wiring

Grid Type

230V Single Phase

Sw2 ConfigurationVolage

L N

PE

N

L

N

L

PE

L N L N L N

E PS O UT PUT G E N G RID

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120V240V

L2N L1 PE

N L PE

L N L N L N

E P S OUTP UT GE N GR I D

PE

L

N

NL

PE

L N L N L N

E PS O UT PUT G E N G RID

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3.4.8 Meter and CT Connection

17

In a completed installed on-grid energy storage system, the CT or Meter should be installed. The CT or Meter

should installed in the right position as below picture.

UPS Load

L1 L2 L1 L2

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3.4.8.1 Connect the Meter

The functional interfaces overview of the meter is shown in below figure. Now Huayu only support EASTRON

SDM120 and SDM630- Modbus Modbus model meter.

Step 1.

Step 2.

Connect the meter in the LN line as below.

Connect the communication cable between inverter and meter, and plug the RJ45 to communication port.

RJ45 Terminal Configuration of Meter/CT Communication

The communication port for communicate

with meter or CT clamp is as below:

1 METER 485 B

METER 485 A

NC

2

3/4

5/6

7

8

Pin Function Description

1 2 3 4 56 7 8

Reserved

CTN

CTP

Step 3. Check the connection. When the meter displays -xxxxW as below figure shows, the hybrid inverter is feeding

power to the grid. and when it displays xxxxW, it means the house load is using energy from grid.

Inverter

Side

AC Grid

Side

12

Huayu HYH-7.6K-NA/Pro User manual

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