Hoymiles HYS-3.0LV-EUG1 User manual

Open Energy for All
USER MANUAL
HYS-3.0LV-EUG1
HYS-3.6LV-EUG1
HYS-4.6LV-EUG1
HYS-5.0LV-EUG1
HYS-6.0LV-EUG1
Region: Global REV1.0 hoymiles.com

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 01
CONTENTS
1. Safety Introduction 02
1.1 Explanation of Symbols 02
1.2 Safety Information 03
2. Introduction 05
2.1 Product Overview 05
2.2 Operating Modes 07
2.3 System Diagram 09
2.3.1 Basic Diagram 10
2.3.2 Retrot System 12
3. Installation Instruction 13
3.1 Packing List 13
3.2 Mounting 14
3.2.1 Selecting the Mounting Location 14
3.2.2 Mounting Inverter 15
3.3 Electrical Wiring Connection 15
3.3.1 Grounding Connection 15
3.3.2 PV Wiring Connection 16
3.3.3 Battery Wiring Connection 17
3.3.4 AC Wiring Connection 18
3.3.4.1 Grid Connection 18
3.3.4.2 EPS Connection 19
3.3.5 Communication Wiring Connection 20
3.3.5.1 BMS Connection 21
3.3.5.2 Smart Meter and CT Connection 22
3.3.5.3 DRM Connection 23
3.3.5.4 DI Connection 24
3.3.5.5 DO Connection 24
3.3.5.6 Parallel Connection 25
3.3.6 DTS Connection 25
3.4 Operation 26
3.4.1 S-Miles Cloud APP 26
3.4.2 Commissioning 27
3.4.3 Decommissioning 27
4. Troubleshooting 28
5. Technical Datasheet 31
6. Contact Information 33

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 02
1. Safety Introduction
1.1 Explanation of Symbols
The following types of safety precautions and general information symbols used in this manual must be
followed during the installation, operation, and maintenance of the inverter.
Symbol Usage
Indicates a hazard with a high level of risk that, if not avoided, will result in
death or serious injury.
Indicates a hazard with a medium level of risk that, if not avoided, can result in
death or serious injury.
Indicates a hazard with a low level of risk that, if not avoided, can result in
minor or moderate injury.
Indicates a situation that, if not avoided, can result in property damage.
NOTICE is used to address practices not related to personal injury.
Caution! Failure to observe any warnings contained in this manual may result
in injury.
Danger to life due to high voltages!
Only qualified personnel can open and maintain the inverter.
Burn danger due to hot surface that may exceed 60℃.
Refer to the operating instructions.
10min
Wait for at least 10 minutes before opening the inverter or touching live parts.
Products shall not be disposed as household waste.
CE mark.
DANGER
WARNING
CAUTION
NOTICE

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 03
This side up! This package must always be transported, handled and stored in
such a way that the arrows always point upwards.
Fragile - The package/product should be handled carefully and should never
be tipped over or slung.
Keep dry! The package/product must be protected from excessive humidity
and must be stored under cover.
6No more than six (6) identical packages are to be stacked on each other.
1.2 Safety Information
This chapter contains important safety and operating instructions. For future reference, please read and
keep this manual.
For the purpose of preventing personal injury and property damage, as well as ensuring the long-term
operation of the product, please read and follow all the instructions and cautions on the inverter and this
user manual during installation, operation, and maintenance.
Safety instructions in this manual cannot cover all precautions that should be taken. Please consider the
actual conditions on site when performing operations. Any damage caused by a violation of the safety
instructions in this manual shall not be the responsibility of Hoymile.
Symbol Usage
Danger to life from electric shock
• Before performing any work on the inverter, disconnect all DC and AC power
from inverter and wait for at least 10 minutes. Hazardous voltage will present
for up to 10 minutes after disconnection from power supply.
• Never insert or remove the AC or DC connections when the inverter is
running.
• Any live parts connected to battery port cannot be touched before removing
all the power from inverter for 10 minutes because there is still danger to life
even battery voltage is lower than 60V.
• Do not touch DC conductors or any non-isolated cable ends.
• The mounting location must be inaccessible to children.
• Never touch either the positive or negative pole of PV connecting device.
Strictly prohibit touching both at the same time.
WARNING
Risk of burns from hot surfaces
• The surface of the inverter might exceed 60℃, touching the surface may
result in burns.
• Do not touch hot surfaces before it cools down.
DANGER

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 04
WARNING
• Only authorized service personnel are allowed to install the inverter or
perform servicing and maintenance.
• All powers, both AC and DC, should be disconnected from inverter before
attempting any maintenance, cleaning or working on any circuits connected
to inverter.
• Attempting to service the inverter yourself may result in a risk of electric
shock or fire and will void your warranty.
• Keep away from flammable, explosive materials to avoid fire disaster.
• The installation place should be away from humid or corrosive substances.
• The unit contains capacitors that remain charged to a potentially lethal
voltage after the mains, battery and PV supply has been disconnected.
• When accessing the internal circuit of inverter, wait for at least 10 minutes.
• The inverter has a transformerless design on PV side. Neither positive nor
negative terminals of PV panels should be grounded.
• The frames of PV panels should be grounded for safety reasons.
• Ensure that existing wiring is in good condition and no wire is undersized.
• Do not disassemble any parts of inverter which are not mentioned in
installation.
• Authorized service personnel must use insulated tools when installing or
working with this equipment.
• PV modules shall have an IEC 61730 class A rating.
• All electrical connections must be in accordance with local and national
standards.
• Only with permission of the local utility grid company, the inverter can be
connected to the utility grid.
• Do not open the inverter cover or change any components without
authorization, otherwise the warranty commitment for the inverter will be
invalid.
• Appropriate methods must be adopted to protect inverter from electrostatic
discharge; any damage caused by ESD is not warranted by the manufacturer.
• Prior to the application, please read this section carefully to ensure the
correct and safe application. Please keep the user manual properly.
• The manual contains no user-serviceable parts. See Warranty for instructions
on obtaining service.
• If an error occurs, contact your local distributor or qualified electricians.
CAUTION
NOTICE

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 05
H
I
J
K
A B C D E F G
* The image shown here is for reference only. The actual product received may differ.
Object Description
A DC Switch
B PV Terminals
C Battery Terminals
D Data Transfer Stick (DTS) Port
E Communication Port
F GRID Connector
G Generator (GEN) Connector
H LED Indicators
I Label
J Emergency Power Supply (EPS) Connector
K PE Terminal
WARNING
• Prior to any electrical connections, keep in mind that the inverter has dual power
supplies. It is mandatory for the qualified personnel to wear personal protective
equipment (PPE) during the electrical work.
2. Introduction
2.1 Product Overview
The HYS-LV Series is a high-performance single-phase hybrid inverter with excellent reliability. The
intelligent EMS function supports self-consumption, economic, and backup modes for multi-scenario
applications. Monitoring management through S-Miles Cloud allows users to remotely diagnose and track
system’s performance over time, offering superior energy production.

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 06
LED Indicators
Indicator Status Explanation
SOC
RUN PV AC COM FAU LT RUN PV AC COM FAULT
RUN PV AC COM FAU LT RUN PV AC COM FAULT
0~25% 25~50%
50~75% 75~100%
Full circle LEDs on – SOC is 75-100%
3/4 circle LEDs on – SOC is 50-75%
2/4 circle LEDs on – SOC is 25-50%
1/4 circle LED on – SOC is 10-25%
1/4 circle circle LED blink – SOC is below 10%
All circle LEDs off – No BMS communication.
RUN
Off – Inverter is shut down
Blink 1 – Inverter is booting
Blink 2 – Inverter is in bypass mode
On – Inverter is turned on
PV
Off – PV voltage is low
Blink 1 – PV power is low
On – PV is generating power
AC
Off – Grid is disconnected and EPS is off
Blink 1 –Grid is disconnected but EPS is on
On – Grid is connected
COM
Off – Communication error of both meter and BMS
Blink 1 – Communication failed to meter
Blink 2 – Communication failed to BMS
On – BMS and meter communications are OK
FAULT
Off – No fault
On - A fault happens
Blink 1 – EPS port overload
Blink 2 – ISO/RCD fault
Blink 3 – Arc fault

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 07
2.2 Operating Modes
Main Operation Modes
Self-consumption Mode
In the daytime, solar energy
supports the loads first and
surplus energy is stored in the
battery. When it is fully charged
or reaches the maximum charge
power,the rest energy is fed into
grid (or limited if required).
At night, the battery discharge for
the loads firstly and the grid will
supply the loads once the battery
power is not enough. In this mode,
battery cannot be charged from
grid at night.
00:00
Battery discharging
at night
24:00
Consuming from
grid
PV surplus power selling
Loads
Self consuming (PV power generation)
PV Power
Battery charging
charging
standby standby discharging discharging
Power flow of self-consumption mode
Economic Mode
In this mode, the time of battery
charge and discharge needs to be
set. Meanwhile, the battery can
be forced to charge from the grid
during the preset charge time.
For instance, the battery could be
charged or discharged according
to valley or peak electricity price.

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 08
Power flow of back-up mode
Back-up Mode
In case of frequent power outages,
a backup power SOC can be
configured, which ensures that the
battery always has enough energy
to handle critical loads.
Power flow of back-up mode

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 09
2.3 System Diagram
The HYS-LV Series hybrid inverter can be connected to a battery and PV panels to form a PV Energy Storage
System (ESS). In the event of a grid outage, it can be used as an emergency power supply (EPS) as well as
for self-consumption of solar energy. It can either form a DC coupled system for a new installation or an AC
coupled system to retrofit existing installations.
PV
Battery
Backup Loads
Revenue Meter
Grid
Main Panel
Main Loads
Generator
DC Power
AC Power
Control Line
Communication
Hoymiles Cloud Phone
PC
Smart Meter
• This diagram is a simplified system sketch that is only intended to
explain system architecture.
• Please refer to https://www.hoymiles.com for compatible battery list,
user should first contact Hoymiles for technical consultation and obtain
official confirmation prior to installing any battery not included in the
official published list.
• Lead-acid battery is not recommended for general customers as
it requires experienced installers and technicians who can fully
understand the battery parameters and configure the setting and
installations correctly. Please contact Hoymiles for technical support on
Lead-acid battery installation.
NOTICE

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 10
2.3.1 Basic Diagram
• This diagram is an example of application that Neutral connects with PE in
distribution box.
• For countries such as Australia, New Zealand, South Africa, etc., please
follow local wiring regulations!
NOTICE
Model ① ② ③ ④ ⑤ ⑥⑦
HYS-3.0LV-EUG1 100A/60V
DC Breaker
20A/230V
AC Breaker
40A/230V
AC Breaker
Depends on
Loads
Main
Breaker 30 mA RCD
HYS-3.6LV-EUG1 125A/60V
DC Breaker
20A/230V
AC Breaker
40A/230V
AC Breaker
HYS-4.6LV-EUG1 125A/60V
DC Breaker
25A/230V
AC Breaker
40A/230V
AC Breaker
HYS-5.0LV-EUG1 125A/60V
DC Breaker
32A/230V
AC Breaker
40A/230V
AC Breaker
HYS-6.0LV-EUG1 125A/60V
DC Breaker
40A/230V
AC Breaker
40A/230V
AC Breaker
A. Diagram for Australia and New Zealand
HYS-LV Series
Battery
BMS
Backup
Loads
Smart
Meter
PV
RCD
Grid
E-BAR
Normal Loads
Distribution Box
PE or
L
N
L
N
PE
EPS
Grid
Meter
L
N
PE
L
N
L N
PE
①
CT
Utility
Meter
③
④
⑤
Do not connect this terminal
when the neutral wire and PE
wire are connected together.
E-N
Link
N-BAR
RCD
⑦
LOAD GRID
②⑥
Note:
If battery integrates a readily accessible internal DC breaker, no additional ①DC breaker is required.
⑥⑦ 30mA RCD is recommended not mandatory, please comply with local regulation, please comply with local regulation.

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 11
• This diagram is an example for an application in which neutral is separated
from the PE in the distribution box.
• For countries such as China, Germany, Italy, etc., please follow local wiring
regulations!
• The back-up PE line and earthing bar must be grounded properly and
effectively. Otherwise, the back-up function may be abnormal when the
grid fails.
Model ① ② ③ ④ ⑤ ⑥⑦
HYS-3.0LV-EUG1 100A/60V
DC Breaker
20A/230V
AC Breaker
40A/230V
AC Breaker
Depends on
Loads
Main
Breaker 30mA RCD
HYS-3.6LV-EUG1 125A/60V
DC Breaker
20A/230V
AC Breaker
40A/230V
AC Breaker
HYS-4.6LV-EUG1 125A/60V
DC Breaker
25A/230V
AC Breaker
40A/230V
AC Breaker
HYS-5.0LV-EUG1 125A/60V
DC Breaker
32A/230V
AC Breaker
40A/230V
AC Breaker
HYS-5.0LV-EUG1 125A/60V
DC Breaker
40A/230V
AC Breaker
40A/230V
AC Breaker
NOTICE
HYS-LV Series
Batter
y
BMS Smart
Mete
r
P
V
RCD
Grid
E-BAR
Normal Loads
Distribution Box
PE o
r
L
N
L
N
PE
EPS
Grid
Meter
L
N
PE
L
N
PE
LN PE
①
CT
Utility
Mete
r
③
④
⑤
RCD
⑦
LOAD GRID
Backup
Loads
②
⑥
Note:
If battery integrates a readily accessible internal DC breaker, no additional ①DC breaker is required.
⑥⑦ 30mA RCD is recommended not mandatory, please comply with local regulation, please comply with local regulation.
B. Diagram for Other Countries

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 12
2.3.2 Retrofit System
The HYS-LV series inverter is compatible with any single-phase PV grid-connected inverters. With the
addition of the hybrid inverter, existing PV system can be retrofitted to be a PV ESS allowing more self-
consumption energy and more back-up energy.
Consult with your system integrator for detailed wirings depending on your requirements.
2.3.3 Unacceptable Diagram
Avoid the following installation types to prevent damage to the system or the inverter.
PV
Battery Backup Loads
Revenue Meter
Grid
Main Panel
Main Loads
DC Power
AC Power
Control Line
Communication
Hoymiles Cloud Phone
PC
Smart Meter
PV
PV Inverter
Smart
Meter

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 13
3. Installation Instruction
3.1 Packing List
Please ensure that none of the components listed below are missing or damaged upon receipt of the
hybrid inverter.

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 14
3.2 Mounting
3.2.1 Selecting the Mounting Location
• Make sure there is no electrical connection before installation.
• In order to avoid electric shock or other injuries, make sure that holes are
not drilled over any electrical parts or plumbing installations.
WARNING
• Make sure the inverter is correctly installed according to the following list.
Any incorrect installation would require a risk assessment.
NOTICE
Check List
1. The inverter installation should be protected by shelter from direct sunlight or bad weather such as
snow, rain or lightning.
2. The inverter should be installed on a solid surface which is suitable for the inverter’s dimensions and
weight.
3. The inverter should be installed vertically or be on a slope with a maximum value of 15°. Leave enough
space around the inverter according to the figure below.
4. The ambient temperature should be between -25°C and 45°C. High ambient temperatures will cause
power derating of the inverter.
5. The relative humidity should be less than 95%, without condensing.
6. The inverter should be installed at eye level for convenient maintenance.
7. The product label on the inverter should be clearly visible after installation.
8. The inverter should be installed far from flammable materials.

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 15
3.2.2 Mounting Inverter
Install the inverter on the wall using the provided wall-mounting bracket and expansion plug sets.
Procedure
Step 1
Step 2
Position the bracket against the
wall and mark the 4 drilling hole
locations.
Drill holes with a driller, make
sure the holes are deep enough
(at least 60 mm).
175mm 75mm
65mm
2
Step 3
Step 4
Place the expansion tubes in
the holes, and tighten them.
Then install the wall bracket
with the expansion screws.
Please verify confirm that the
bracket is firmly attached to the
mounting surface.
3
4
Step 5 Mount the inverter on the
bracket.
5
3.3 Electrical Wiring Connection
3.3.1 Grounding Connection
All non-current carrying metal parts and device enclosures in the PV power system should be grounded.
There is an additional grounding terminal located at bottom right of the inverter, connect to a nearby
grounding point.
Procedure
Step 1
Step 2
Prepare the cable and OT/DT
terminal.
Use the Screw from the
accessory box. Then fasten the
cable with a screwdriver.
21
M4
1.2 N·m
L=H+(2-3)mm
mm²
SH
L

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 16
WARNING
Before connecting, please make sure all requirements listed below are
followed.
• The voltage, current, and power ratings of the panels to be connected are
within the allowable range of the inverter, ensure the polarity is correct,
and please refer to the Technical Data in Chapter 5 for voltage and current
limits.
• Since the inverter is a transformerless structure, please do not ground
either output of the PV panels.
• If the inverter is integrated with a PV switch, please make sure it is in the
“off” position. Otherwise please use an external PV switch to cut off the PV
connection during wiring and when necessary.
• Use the PV connectors in the accessory box for PV connections. Damage to
the device due to the use of an incompatible terminal shall not be covered
by the warranty.
• Please make sure the connectors are correct, not the battery connectors, as
they look similar.
NOTICE
Procedure
Step 1 • Unscrew the PV connector counterclockwise.
• Remove the insulator.
• Remove the inner cable gland.
1
2 3
PV+
PV-
1
Step 2 • Strip the insulation from each DC cable by 7-8
mm.
• The conduct core-section: 2.5-4 mm².
• Assemble cable ends with crimp contacts by
crimping pliers.
2
:4-5mm
S
7-8mm
Step 3 • Lead the cable through the cable gland.
• Insert the crimp contact into the insulator until
it snaps into place.
• Gently pull the cable backward to ensure a firm
connection.
• Tighten the cable gland and the insulator.
3
321
PV+
PV-
4
Step 4 • Check the cable connection of the PV string for
polarity correctness and ensure that the open-
circuit voltage in any case does not exceed the
inverter input limit of 550 V.
• Connect the PV connectors to the inverter.
There should be a “click” sound, if it is plugged
in correctly.
4
Click
3.3.2 PV Wiring Connection

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 17
3.3.3 Battery Wiring Connection
This section mainly describes the cable connections on the inverter side. Refer to the instructions supplied
by the battery manufacturer for the connections on the battery side.
For batteries without a built-in DC breaker, make sure that an external DC breaker is connected.
If you need to use this hybrid inverter as a grid-tied inverter, please contact Hoymiles for help.
WARNING
• A two-pole DC breaker with OCP function is compulsory to be installed
between the inverter and battery. The battery may have this switch
integrated. If not, an external DC switch of proper ratings should be used.
• Make sure the breaker mentioned above is in the “off” position.
• Use the battery connectors in the accessory box for battery connections.
NOTICE
Procedure
Step 1 • Unscrew the battery connector
counterclockwise.
• Remove the insulator.
• Remove the inner cable gland.
23
1
1
Step 2 • Strip the insulation from each DC cable
by 7-8mm.
• The conduct core-section: 20-25 mm².
• Assemble cable ends with crimp contacts
by crimping pliers. 2
1
2
S:20-25mm²
2
Step 3 • Check the cable connection of the
battery for polarity correctness and
ensure that the open-circuit voltage in
any case does not exceed the input limit
of 60 V.
• Connect the battery connectors to the
inverter. There should be a “click” if it is
plugged in correctly.
3
Click

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 18
3.3.4 AC Wiring Connection
3.3.4.1 Grid Connection
WARNING
Before connecting, please make sure all requirements listed below are
followed.
• Use the Grid Connector from the accessory box. Damage to the device due
to the use of incompatible connector shall not be covered by the warranty.
• An independent three or four-pole circuit breaker must be installed on the
output side of the inverter to ensure safe disconnection from the grid.
• Multiple inverters cannot share one circuit breaker.
• Never connect a load between the inverter and the circuit breaker.
Procedure
Step 1 • Thread the AC cable of appropriate length
through the waterproof terminal.
• Remove the cable jacket by 20~25 mm, and
strip the wire insulation by 7-8 mm.
• The conduct core-section: 6 mm².
1
S=6mm²
7-8mm
20-25mm
Step 2 • Unscrew the Grid connector
counterclockwise.
• Disassemble the parts in sequence.
2346
5
5
1
2
Step 3 • Press the connectors tightly on the cable
conductor core. Make sure the cable jacket is
not locked within the connector.
3
Step 4 • Fix all cables to the corresponding
terminals with a torque of 2 N•m, according
to markings on the connector with a
screwdriver. Make sure the L/N/PE are
correctly assembled.
• Assemble the parts in sequence.
3
2
4
4
5
M6
2 N·m
1
6
Step 5 • Tighten the waterproof terminal clockwise
• Connect the grid connector to the inverter.
There should be a “click” sound, if it is
plugged in correctly.
5
Click

Hybrid Inverter User Manual
© 2022 Hoymiles Power Electronics Inc. All rights reserved. 19
• If you need to connect Diesel Generator Connector, the method is the same
as above.
NOTICE
3.3.4.2 EPS Connection
HYS-LV series has On-grid and Off-grid function, the inverter will deliver output power through the GRID
port when the grid is on, and it will deliver output power through the EPS port when the grid is off.
A standard PV installation typically consists of connecting the inverter to both panels and batteries.
When the system is not connected to the batteries, the manufacturer strongly advises that the backup
function not be used. The manufacturer will not honor the standard warranty and will not be liable for any
consequences arising from users not following this instruction.
WARNING
• Before connecting, please make sure all requirements listed below are
followed.
• Use the Grid Connector from the accessory box. Damage to the device
due to the use of an incompatible connector shall not be covered by the
warranty.
• An independent three or four-pole circuit breaker must be installed on the
output side of the inverter to ensure safe disconnection from the grid.
• Multiple inverters cannot share one circuit breaker.
• Never connect a load between the inverter and the circuit breaker.
• Make sure the EPS load power rating is within the EPS output rating,
otherwise the inverter will shut down with an “overload” warning.
• For the nonlinear load, please make sure the inrush power should be within
the EPS output power range.
Procedure
Step 1 • Thread the AC cable of appropriate
length through the waterproof
terminal.
• Remove the cable jacket by 20~25
mm, and strip the wire insulation by
7-8 mm.
• The conduct core-section: 6 mm².
Step 2 • Unscrew the GEN connector
counterclockwise.
• Disassemble the parts in sequence.
Step 3 • Press the connectors tightly on the
cable conductor core. Make sure
the cable jacket is not locked within
the connector.
3