Hoymiles MI-1000 User manual

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

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User Manual
INTRODUCTION ...........................................................................................................3
SAFETY............................................................................................................................................4
SYMBOL ILLUSTRATION ........................................................................................4
INSTALLATION WARNINGS..........................................................................................5
PREPARE FOR INSTALLING ....................................................................................................6
TRANSPORT AND INSPECT .........................................................................................6
CHECK INSTALLATION ENVIRONMENT ...................................................................7
INSTALLATION POSITION............................................................................................. 7
MOUNTING AND WIRING...........................................................................................................8
INSTALLING DIAGRAM..................................................................................................8
ASSEMBLY INSTRUCTION............................................................................................ 9
Step 1. Install Microinverter..........................................................................................9
Step 2. Install AC Junction Box..................................................................................10
Step 3. Connect AC Cables of Microinverter ...........................................................10
Step 4. Connect AC End Cable .................................................................................10
Step 5. Create an Installation Map............................................................................11
Step 6. Connect PV Modules.....................................................................................12
Step 7. Energize the System......................................................................................13
Step 8. System Monitoring Set Up ............................................................................13
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
TECHNICAL DATA.........................................................................................................18
INSTALLATION MAP..............................................................................................20

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INTRODUCTION
Thank you for using MI-1000/MI-1200Microinverter! This Microinverter system is the
world’s most technologically advanced inverter system 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. Different from systems that
photo voltaic modules are subdivided into strings and controlled by one or several
inverters, this system is built for the incorporation of a Microinverter for each photo voltaic
module. Each Microinverter works independently of the others to guarantee maximum
power of each photo voltaic module. This setup enables direct control over the production
of a single photo voltaic module, consequently improving the flexibility and reliability of the
system.
This 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.
Contact Information
Hoymiles Power Electronics Technology Co. , Ltd.
No.18 Kangjing Road, Hangzhou, Zhejiang Province, China
Phone: [phone]
Fax: [phone]
http://www.hoymiles.com
Hoymiles can provide commissioning. Please contact Hoymiles customer service at
086-0571-89775158.More information at website:
http://www.hoymiles.com

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SAFETY
IMPORTANT SAFETY INSTRUCTIONS!
PLEASE KEEP THIS INTRODUCTION IN A SAFE PLACE!
SYMBOL ILLUSTRATION
1)The safety symbols used in this manual are list below and illustrated in detail.
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 avoidpotential 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 full
understand the operations explained before proceeding.

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2)The symbols on the microinverter are list below and illustrated in detail.
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& AS 3000).
However, certain safety precautions must be taken when installing and operating this
inverter. The installer must read and follow all instructions, cautions and warnings in this
installation manual.
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.

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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
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 of the equipment 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.
SeeAppendix: 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.
Fig.1. Installation position of Microinverter

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MOUNTING AND WIRING
INSTALLING DIAGRAM
System Wiring Diagram
(a) Single phase wiring diagram
(b) Three phase wiring diagram
Fig.2. MI-1000/MI-1200 Microinverter wiring diagram
Note 1: 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.
Note 2: Each branch should provide a 20A circuit breaker, but no need for central
protection unit.

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Assembly Diagram
Fig.3. Assembly Illustration
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.

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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
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

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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.
Note:
b. Affix the serial number label to the respective location on the installation map.

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Note: The serial number of MI-1000 microinverter needs to be placed in the middle
of 4 blanks, and it is marked 1, 2, 3 and 4, and the micro-inverse dc port connected
to the four 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.
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.

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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 the AC 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.
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.
Post-Startup LED Indications
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:Not producing power. AC grid invalid (Voltage or frequency out of

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range)
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.

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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 Micro- inverter)
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
GIRD FRIENDLY FUNCTIONS
1. 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
Note: 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.
2. Active power control at over frequency
The default value fRis 50.20 Hz, and can be adjusted to any value in the 50.00-52.00 Hz range
with an accuracy of 10 mHz. The default value for droop is 4% of Pn, and can be adjusted to
any value in the range 2-12% of Pn.
3. Constraint functions
3.1 Absolute power constraint function
Power constraint range is 10% to 100% of rated output power. The accuracy of the constraint
power is less than ±5% of the set point value.
3.2 Ramp rate constraint function
Ramp rate constraint range is 10W/s to 100kW/s, the default value is set at 10kw/s
Both absolute power constraint function and ramp rate constraint function are deactivated.
4. Reactive power control
Three kinds of reactive power control is provided, which is shown below.
Reactive power control function
Technical data
Remark
Q control
10VAr resolution
deactivated
Power Factor control
0.85 leading to 0.85 lagging
deactivated
Automatic Power Factor control
activation level is 1.05Un
deactivation level is 1.0 Un
deactivated

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TECHNICAL DATA
Model
MI-1000
Input data(DC)
Recommended input power (W)
200~310
MPPT voltage range (V)
27~48
Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
10.5
Output Data (AC)
Rated output power (W)
1000
Rated output current (A)
4.35
Nominal output voltage/range (V)
230/180-275 1
Nominal frequency/range (Hz)
50/45-55 1
Power factor
>0.99
Output current harmonic distortion
<3%
Maximum Units per 20A Branch
4
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
I

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Model
MI-1200
Input data(DC)
Recommended input power (W)
200~380
MPPT voltage range (V)
32~48
Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
10.5
Output Data (AC)
Rated output power (W)
1200
Rated output current (A)
5.22
Nominal output voltage/range (V)
230/180-275 1
Nominal frequency/range (Hz)
50/45-55 1
Power factor
>0.99
Output current harmonic distortion
<3%
Maximum Units per 20A Branch
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
NSTALLATION MAP

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