Hoymiles MI-1000 User manual

MI-1000 /MI-1200
User Manual
MICROIVERTER
(Model: MI-1000 /MI-1200)

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Table of Contents
About this User Manual.................................................................................................................2
Important Safety Instructions........................................................................................................3
Symbol Illustration..........................................................................................................................3
Installation Warnings...........................................................................................................4
Prepare for Installing......................................................................................................................5
Transport and Inspect.........................................................................................................5
Check Installation Environment.........................................................................................6
Installation Position..............................................................................................................6
Mounting and Wiring......................................................................................................................7
Installing Diagram................................................................................................................7
Assembly Instruction...........................................................................................................9
Step 1. Install Microinverter............................................................................................9
Step 2. Install AC Junction Box.....................................................................................9
Step 3. Connect AC Cables of Microinverter...............................................................9
Step 4. Connect AC End Cable...................................................................................10
Step 5. Create an Installation Map..............................................................................10
Step 6. Connect PV Modules.......................................................................................11
Step 7. Energize the System .......................................................................................12
Step 8. System Monitoring Set Up..............................................................................12
Troubleshooting............................................................................................................................13
Status Indications and Error Reporting ......................................................................13
Troubleshoot an Inoperable Microinverter.................................................................14
Maintenance Guide......................................................................................................................15
Routine Maintenance........................................................................................................15
Storage and Dismantling..................................................................................................16
Appendix........................................................................................................................................17
Grid Friendly Functions.....................................................................................................17
Datasheet............................................................................................................................17
Installation Map..................................................................................................................19
Accessories Details...........................................................................................................21

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About this User Manual
Thank you for using Hoymiles’MI-1000 /MI-1200 Microinverter! This Microinverter system
is the world’s most technologically advanced inverter system in the world with benefits of
efficient, flexible, safe and reliable for use in utility-interactive applications.
This system is composed of a group of Microinverters that convert direct current (DC) into
alternating current (AC) and feeds it into the electric grid. Unlike the systems that
photovoltaic modules are subdivided into strings and controlled by one or more inverters,
this system is designed for the incorporation of one Microinverter for four photovoltaic
modules. Each Microinverter works independently to ensure maximum power of each
photovoltaic module. This setup enables user to control the production of a single
photovoltaic module directly, consequently improving the flexibility and reliability of the
system.
This user manual contains important instructions for the MI-1000 /MI-1200 Microinverter
and must be read in its entirety before installing or commissioning the equipment. For
safety, only qualified technician, who has received training or has demonstrated skills can
install and maintain this Microinverter under the guide of this document.
Support and Contact Information
If you have technical queries concerning our products, please contact your system
installer. If further support is required, contact Hoymiles support at this link.
http://www.hoymiles.com
Hoymiles customer service center
Tel:[phone]
Hoymiles Converter Technology Co. , Ltd.
No.18 Kangjing Road, Hangzhou, 310015, China
Tel: [phone]
E-mail:sales@hoymiles,com

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Important Safety Instructions
Symbol Illustration
The safety symbols in this user manual are show as below.
Symbol
Usage
Indicates a hazardous situation that can result in deadly electric
shock hazards, other serious physical injury, or fire hazards.
Indicates directions which must be fully understood and followed in
entirety in order to avoid potential safety hazards including
equipment damage or personal injury.
This points out that the described operation must not be carried out.
The reader should stop, use caution and fully understand the
operations explained before proceeding.
Symbols replace words on the equipment, on a display.
Symbol
Usage
Treatment
To comply with European Directive 2002/96/EC on waste Electrical and
Electronic Equipment and its implementation as national law, electrical
equipment that has reached the end of its life must be collected separately
and returned to an approved recycling facility. Any device no longer
required must be returned to an authori zed dealer or approved collection
and recycling facility.
Caution
Do not come within 8 inches (20cm) of the microinverter for any length of
time while it is in operation.
Danger of high voltages
Danger to life due to high voltage in the microinverter.
Beware of hot surface
The inverter can become hot during operation. Avoid contact with metal
surfaces during operation.
CE mark
The inverter complies with the requirements of the Low Voltage Directive
for the European Union.
Read manual first
Please read the installation manual first before installation, operation and
maintenance.

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Installation Warnings
The MI-1000/MI-1200 Microinverter is designed and tested according to international
safety requirements (IEC62109-1/-2, VDE4105, VDE0126, AS 4777.1 /.2)
Note: For some countries the DTU will be required in order to meet the local grid
regulation (eg. UK for G98).
All operations including transport, installation, start-up and maintenance, must be carried out by
qualified, trained personnel.
Before installation, check the unit to ensure absence of any transport or handling damage, which
could affect insulation integrity or safety clearances. Choose installation location carefully and
adhere to specified cooling requirements. Unauthorized removal of necessary protections,
improper use, incorrect installation and operation may lead to serious safety and shock hazards
or equipment damage.
Before connecting the Microinverter to the power distribution grid, contact the local power
distribution grid company to get appropriate approvals. This connection must be made only by
qualified technical personnel. It is the responsibility of the installer to provide external disconnect
switches and Overcurrent Protection Devices (OCPD).
Only one photovoltaic module can be connected in the input of the inverter. Do not connect
batteries or other sources of power supply. The inverter can be used only if all the technical
characteristics are observed and applied.
Do not install the equipment in adverse environment conditions such as flammable, explosive,
corrosive, extreme high or low temperature, and humid. Do not use the equipment when the
safety devices do not work or disabled.
Use personal protective equipment, including gloves and eye protection when working.
Inform the manufacturer about non-standard installation conditions.
Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.
All repairs should be carried out using only qualified spare parts, which must be installed in
accordance with their intended use and by a licensed contractor or authorized Hoymiles service
representative.
Liabilities arising from commercial components are delegated to their respective manufacturers.
Anytime the inverter has been disconnected from the power network, use extreme caution as
some components can retain charge sufficient to create a shock hazard. Prior to touching any part
of the inverter use care to ensure surfaces and equipment are at touch safe temperatures and
voltage potentials before proceeding.
Hoymiles accepts No liability for damage from incorrect or careless operation
Electrical Installation & Maintenance shall be conducted by licensed electrician and shall comply
with Australia National Wiring Rules.

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Prepare for Installing
Transport and Inspect
Hoymiles packages and protects individual components using suitable means to make the
transport and subsequent handling easier. Transportation of the equipment, especially by
road, must be carried out by suitable ways for protecting the components (in particular, the
electronic components) from violent, shocks, humidity, vibration, etc. Please dispose the
packaging elements in appropriate ways to avoid unforeseen injury.
It is the customer’s responsibility to examine the condition of the components transported.
Once receiving the Microinverter, it is necessary to check the container for any external
damage and verify receipt of all items. Call the delivering carrier immediately if damage or
shortage is detected. If inspection reveals damage to the inverter, contact the supplier, or
authorized distributor for a repair/return determination and instructions regarding the
process.

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Check Installation Environment
Installation is carried out based on the system design and the place in which the
equipment is installed.
The installation must be carried out with the equipment disconnected from the grid
(power disconnect switch open) and with the photovoltaic modules shaded or
isolated.
See Appendix: Technical Data to check the environmental parameters to be observed
(degree of protection, temperature, humidity, altitude, etc.)
To avoid unwanted power derating due to an increase in the internal temperature of
the inverter, do not expose it to direct sunlight.
To avoid overheating, always make sure the flow of air around the inverter is not
blocked.
Do not install in places where gasses or flammable substances may be present.
Avoid electromagnetic interference that can compromise the correct operation of
electronic equipment.
Installation Position
When choosing the position of installation, comply with the following conditions:
Install only on structures specifically conceived for photovoltaic modules (supplied by
installation technicians).
Install Microinverter underneath the photovoltaic modules so that they work in the shade.
If this condition cannot be met, the inverter could undergo derating.

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Fig.1 Installation position of microinverter
Mounting and Wiring
Installing Diagram
System Wiring Diagram
(a) Single phase wiring diagram

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(b) Three phase wiring diagram
Fig.2 MI-1000 /MI-1200 Microinverter wiring diagram
DTU connects the power production of each microinverter. If the asymmetry
current is going to exceed 16 A, DTU will send stop signal to one or more
microinverters to let the asymmetry current lower than 16A.
Each branch should provide a 20A circuit breaker, but no need for central
protection unit.
Assembly Diagram
Fig.3. Assembly diagram

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Assembly Instruction
Step 1. Install Microinverter
a. Mark the approximate center of each panel on the frame.
b. Install the microinverter shown as below. The silver cover side should be up.
Observe the certification documents concerning the maximum number of Micro-
inverters permitted for installation at each cable section!
The Microinverter must be under the module, out of long-term exposure to direct
sunlight or rain.
Step 2. Install AC Junction Box
a. Install an AC junction box at the suitable location on the racking.
b. Provide an AC connection from the AC junction box back to the electricity
network connection using equipment and practices as required by local
jurisdictions.
Step 3. Connect AC Cables of Microinverter
a. Plug the AC connector of the first microinverter into the connector of the next
microinverter, and so forth, to form a continuous AC branch circuit
b. Install the AC End Cap on the open AC connector of the last microinverter in the
AC branch circuit.

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Step 4. Connect AC End Cable
a. Connect the AC End Cable connector to the adjacent microinverter connector.
b. Connect AC End Cable to the junction box and wire with the cable to the
electricity network. Close the junction box after the wiring is complete.
Note: Brown Wire: L
Blue Wire: N
Yellow/Green Wire: Ground
To prevent electrical hazards, all the connection operations must be carried out with
the equipment disconnected from the grid.
All the external connections to the insulated junction box (caps, adapters, etc.) must
be made with securely-sealed Hoymiles components.
Pay special attention and ensure not to reverse the phase with the neutral!
The installation technician is responsible for selecting a junction box with the
appropriate dimensions and insulation.
The installation technician is responsible for selecting a cable running between the
junction box and the load distribution panel with the appropriate length and cross
section.
Step 5. Create an Installation Map
a. Peel the removable serial number label from each microinverter. The position of
the label is shown as below.

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Note: the DC inputs of MI-1000/MI-1200 are identified by 1,2 and 3,4. The left input is 1,2
and the right one is 3,4, shown as above.
b.Affix the serial number label to the respective location on the installation map.
Note: the serial number label of MI-1000/MI-1200 should be affixed between for 4 blanks
and mark 1,2,3 and 4 to identify the four connected PV panels.
Step 6. Connect PV Modules
a. Mount the PV modules above the microinverters.
b. Connect the DC cables of the modules to the DC input side of the microinverter.

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c. Check the LED on the side of the microinverter. The LED flashes six times at start
up. All green flashes indicate normal start up.
The recommended installation need keeping the Microinverters underneath the
photovoltaic modules, so that the Microinverters can operate in the shade. Direct
sunlight may cause damage to the Microinverters.
Each module must be connected to the Microinverters with a DC cable having a
length of less than 3m.
Step 7. Energize the System
a. If applicable, turn on theAC disconnect or circuit breaker for the branch circuit.
b. Turn on the main utility-grid AC circuit breaker. Your system will start producing
power after about a two-minute wait time.
Step 8. System Monitoring Set Up
Refer to the DTU User Manual or the DTU Quick Install Guide to install the DTU and
set up system monitoring.

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Troubleshooting
Qualified personnel can use the following troubleshooting steps if the PV system does not
operate correctly.
Status Indications and Error Reporting
Startup LED Operation
Five short green blinks when DC power is first applied to the microinverter indicate a
successful microinverter startup.
Status LED Indicator
Flashing Slow Green (2s gap): Producing power and communicating with DTU.
Flashing Fast Green (4s gap): Producing power and not communicating with DTU.
Flashing Red(1s gap): Not producing power AC grid invalid (Voltage or frequency out
of range).
Flashing Red(always): GFDI Fault. The LED will remain red and the fault will continue
to be reported by the DTU.

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Troubleshoot an Inoperable Microinverter
To troubleshoot an inoperable microinverter, follow the steps in the order shown.
1. Verify the utility voltage and frequency are within ranges shown in the in appendix
Technical Data of this microinverter.
2. Check the connection to the utility grid. Verify utility power is present at the inverter in
question by removing AC, then DC power. Never disconnect the DC wires while the
microinverter is producing power. Re-connect the DC module connectors and watch for
five short LED flashes.
3. Check the AC branch circuit interconnection between all the microinverters. Verify each
inverter is energized by the utility grid as described in the previous step.
4. Make sure that any AC breaker are functioning properly and are closed.
5. Check the DC connections between the microinverter and the PV module.
6. Verify the PV module DC voltage is within the allowable range shown in appendix
Technical Data of this manual.
7. If the problem persists, please call Hoymiles customer support.
Warning
Do not try to repair the microinverter. If the troubleshooting fails, please return it to the
factory for replacement.

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Maintenance Guide
Routine Maintenance
Only authorized personnel are allowed to carry out the maintenance operations and
are responsible to report any anomalies.
Always use the personal protective equipment provided by the employer when carry
out the maintenance operation.
During normal operation, check that the environmental and logistic conditions are
correct. Make sure that the conditions have not changed over time and that the
equipment is not exposed to adverse weather conditions and has not been covered
with foreign bodies.
DO NOT use the equipment if any problems are found, and restore the normal
conditions after the fault removed.
Conduct an annual inspection on various components, and clean the equipment with
a vacuum cleaner or special brushes.
Do not attempt to dismantle the Microinverter or make any internal repairs! In order to
preserving the integrity of safety and insulation, the Microinverters are not designed
to allow internal repairs!
The AC output wiring harness (AC drop cable on the Microinverter) cannot be replaced.
If the cord is damaged the equipment should be scrapped.
Maintenance operations must be carried out with the equipment disconnected from
the grid (power switch open) and the photovoltaic modules obscured or isolated,
unless otherwise indicated.
For cleaning, do not use rags made of filamentary material or corrosive products that
may corrode parts of the equipment or generate electrostatic charges.
Avoid temporary repairs. All repairs should be carried out using only genuine spare
parts.

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Storage and Dismantling
If the equipment is not used immediately or is stored for long periods, check that it is
correctly packed. The equipment must be stored in well-ventilated indoor areas that
do not have characteristics that might damage the components of the equipment.
Take a complete inspection when restarting after a long time or prolonged stop.
Please dispose the equipment properly after scrapping, which are potentially harmful
to the environment, in accordance with the regulations in force in the country of
installation.

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Appendix
Grid Friendly Functions
Protection Settings against electricity system faults
Protective function
Symbol
Setting
Trip time
Overvoltage (step 2)
U>>
264.5
V
200
ms
Overvoltage (step 1)
U>
253.0
V
60
s
Undervoltage (step 1)
U<
195.5
V
50
s
Undervoltage (step 2)
U<<
184.0
V
100
ms
Overfrequency
f>
52
Hz
200
ms
Underfrequency
f<
47
Hz
200
ms
Change of frequency
df/dt
+-2.5
Hz/s
80
ms
The connection and synchronisation occur three minutes, at the earliest, after voltage and
frequency have come within the normal production range, the reconnection voltage range
is 195.5V to 253.0V and the reconnection frequency range is 47Hz to 52Hz.
Datasheet
Warning
Confirm the output current, voltage and microinverter matching of the solar module.
The DC operating voltage range of the solar module must be within the microinverter input voltage
range.
The maximum open circuit voltage of the solar module cannot exceed the maximum input voltage of
the microinverter

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Model
MI-1000
Input data(DC)
Recommended input power (W)
240~380
MPPT voltage range (V)
27~48
Start-up voltage (V)
22
Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
10.5
Output Data (AC)
@230V AC @240V AC @208V AC
Rated output power (W)
1000
Rated output current (A)
4.35 4.16 4.81
Nominal output voltage/range (V)
230/180-275 240/211-264 208/183-250
Nominal frequency/range (Hz)
50/45-55 60/59.3-60.5 60/59.3-60.5
Power factor
>0.99 >0.99 >0.99
Output current harmonic distortion
<3% <3% <3%
Maximum Units per 20A Branch
4 4 3
Efficiency
Peak inverter efficiency
96.5%
CEC weighted efficiency
96.0%
Nominal MPPT efficiency
99.8%
Night time power consumption (mW)
<50
Environmental & Mechanical Data
Ambient temperature range (℃)
-40 ~ +65
Operating temperature range (℃)
-40 ~ +85
Dimensions (W×H×D mm)
28017633
Weight (kg)
3.75
Enclosure rating
IP67
Cooling
Natural convection –No fans
Features
Communication
Wireless
Design Life
>25 Years
1 Volatage and frequency ranges can be extended beyond nominal if required by the utility

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Model
MI-1200
Input data(DC)
Recommended input power (W)
240~380
MPPT voltage range (V)
32~48
Start-up voltage (V)
22
Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
10.5
Output Data (AC)
@230V AC @240V AC @208V AC
Rated output power (W)
1200
Rated output current (A)
5.22 5 5.76
Nominal output voltage/range (V)
230/180-275 240/211-264 208/183-250
Nominal frequency/range (Hz)
50/45-55 60/59.3-60.5 60/59.3-60.5
Power factor
>0.99 >0.99 >0.99
Output current harmonic distortion
<3% <3% <3%
Maximum Units per 20A Branch
3 3 3
Efficiency
Peak inverter efficiency
96.5%
CEC weighted efficiency
96.0%
Nominal MPPT efficiency
99.8%
Night time power consumption (mW)
<50
Environmental & Mechanical Data
Ambient temperature range (℃)
-40 ~ +65
Operating temperature range (℃)
-40 ~ +85
Dimensions (W×H×D mm)
28017633
Weight (kg)
3.75
Enclosure rating
IP67
Cooling
Natural convection –No fans
Features
Communication
Wireless
Design Life
>25 Years
1 Volatage and frequency ranges can be extended beyond nominal if required by the utility