Hoymiles MI-1200 User manual

MICROINVERTER
User Manual
(Model: MI-1200 /MI-1000)
for North America
Rev 1.0

Microinverter user manual
Contact Information
Hoymiles Converter Technology Co., Ltd.
No.18 Kangjing Road, Hangzhou, Zhejiang Province, China
www.hoymiles.com
[email protected]

1
FCC Compliance
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, you are encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected. Consult the dealer or an experienced
radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for
compliance may void the user’s authority to operate the equipment.
This device complies with Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device. Under Industry
Canada regulations, this radio transmitter may only operate using an antenna
of a type and maximum (or lesser) gain approved for the transmitter by
Industry Canada. To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that necessary for successful
communication.

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(1) l'appareil ne doit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
Le pr¨|sent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.
L'exploitation est autoris¨|e aux deux conditions suivantes:

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CONTENTS
1. IMPORTANT SAFETY INFORMATION...................................4
1.1. SAFETY INSTRUCTIONS AND WARNINGS...................4
1.2. SYMBOLIC INTERPRETATION.......................................... 5
1.3. PV RAPID SHUTDOWN EQUIPMENT (PVRSE)............ 6
2. INTRODUCTION..........................................................................7
3. SYSTEM INSTALLATION.......................................................... 9
3.1. PREPARE FOR INSTALLING..............................................9
3.2. ASSEMBLY INSTRUCTION.................................................9
4. TECHNICAL DATA....................................................................14
5. INSTALLING DIAGRAM.......................................................... 19
6. INSTALLATION MAP............................................................... 20

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1. IMPORTANT SAFETY INFORMATION
1.1. SAFETY INSTRUCTIONS AND WARNINGS
Hoymiles Converter Technology Co., Ltd. (hereinafter referred to as Hoymiles)
MI-1200/ MI-1000 model microinverter (hereinafter referred to as microinverter)
is strictly designed and tested according to the national safety regulations.
However, the installation and maintenance must follow the instructions below.
Improper operation will cause serious damage to the operator and the third
party as well as property loss.
(1) Hoymiles microinverter must be installed and maintained by professionals
in accordance with local installation standards and regulations.
(2) Please read all the warnings and instructions in this manual and warning
signs on the microinverter and PV modules before installing and
maintaining the Hoymiles microinverter.
(3) The AC side grid connection must be disconnected before installing and
maintaining the microinverter.
(4) To avoid the risk of burns, do not touch the microinverter casing, the case
temperature can reach as high as 80°C.
(5) The end connector of the AC feeder must be covered with a special
waterproof cover.
(6) Ensure that the DC input voltage is less than the maximum input voltage of
the microinverter, otherwise the microinverter will be damaged, and
Hoymiles will not be responsible or warranted.
(7) Do not immerse the microinverter and connector in the liquid and expose it
to the oriented, pressurized liquid (spray, etc.,).
(8) Do not try to repair Hoymiles microinverter by yourself. If there is a
breakdown, please contact Hoymiles customer services.
WARNING - These servicing instructions are for use by qualified personnel
only. To reduce the risk of electric shock, do not perform any servicing other

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than that specified in the operating instructions.
CAUTION - To reduce the risk of fire, connect only to a circuit provided with
branch circuit overcurrent protection in accordance with the National Electrical
Code, ANSI/NFPA 70.
1.2. SYMBOLIC INTERPRETATION
1) The safety symbols used in this manual are list below and illustrated in
detail.
Symbol
Usage
Indicates a dangerous 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.

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2) The symbols on the microinverter are list below and illustrated in detail.
Symbol
Usage
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.
CSA mark
The inverter complies with the requirements of UL1741
and IEEE1547 standards.
Read manual first
Please read the installation manual first before
installation, operation and maintenance.
1.3. PV RAPID SHUTDOWN EQUIPMENT (PVRSE)
This product is CSA Listed as PV Rapid Shut Down Equipment and conforms
with NEC-2014 and NEC-2017 section 690.12 and C22.1-2015 Rule 64-218
Rapid Shutdown of PV Systems, for AC and DC conductors, when installed

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according to the following requirements:
Microinverters and all DC connections must be installed inside the
array boundary. Enphase further requires that the microinverters and
DC connections be installed under the PV module to avoid direct
exposure to rain, UV, and other harmful weather events.
The array boundary is defined as 305 mm (1 ft.) from the array in all
directions, or 1 m (3 ft.) form the point of entry inside a building.
This rapid shutdown system must be provided with an initiating device and (or
with) status indicator which must be installed in a location accessible to first
responders, or it must be connected to an automatic system which initiates
rapid shutdown upon the activation of a system disconnect or activation of
another type of emergency system.
The initiator shall be listed and identified as a disconnecting means that plainly
indicates whether it is in the “off” or “on” position. Examples are:
Service disconnecting means
PV system disconnecting means
Readily accessible switch or circuit breaker
The handle position of a switch or circuit breaker is suitable for use as an
indicator. Refer to NEC or CSA C22.1-2015 for more information.
2. INTRODUCTION
Hoymiles microinverter system is shown in the figure below. The whole system
consists of two parts, PV grid-connected power generation unit and PV
monitoring unit. PV grid-connected power generation units include PV modules,
microinverters, AC wiring harnesses and other system accessories; monitoring
units include DTU (data collector), remote monitoring server and other
accessories. Microinverter is the core product of PV grid-connected power

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generation unit. On one hand, it is responsible for real-time tracking the
maximum power point of the PV module, ensuring that the panels are always
working in the optimal output state; on the other hand, it efficiently converting
the input PV module DC power into the grid AC power, then delivers to the grid.
Other parts of Hoymiles microinverter system
DTU: The transfer station of the microinverter system power generation
information, through the 2.4G RF and the microinverter communication, collect
the real-time operating data of the microinverter, and transmit the collected
microinverter data to Hoymiles remote monitoring server via Ethernet.
Remote monitoring server: Collects the operating data and status of each
microinverter in the system through DTU, and provides module-level
monitoring to the user and the operation and maintenance personnel through
monitoring portal or APP to achieve remote operation and maintenance, and
improve the efficiency of operation and maintenance.

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3. SYSTEM INSTALLATION
3.1. PREPARE FOR INSTALLING
Before installation, please prepare the relevant installation materials and tools.
In addition to microinverter, solar panels and installation brackets, users also
need the following accessories:
Hoymiles accessories:
DTU (optional, as a monitor)
AC end cable
AC end cap
Other Accessories:
Outdoor waterproof AC junction box
Torque wrench
Cross screwdriver
3.2. ASSEMBLY INSTRUCTION
The installation diagram of MI-1200/MI-1000 microinverter is shown in the
figure below. One microinverter connects with four panels and places in the
middle of them, the junction box of the four panels must be placed close to the
microinverter.

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Assembly Illustration
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.
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

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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：Red Wire: L1
Black Wire: L2
Yellow/Green Wire: Ground
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 or 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 of MI-1000/MI-1200 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.

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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.
Indicator flashing situation
Microinverter working condition
Flashing green light
(2s interval)
Microinverter normal operation and
normal communication with DTU

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Green light flashes slowly
(4s interval)
Microinverter works normally but
the communication with the DTU is
abnormal
Red light flashes
(1s interval)
Grid anomaly
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.
4. TECHNICAL DATA
Model
MI-1000
Input data(DC)
Recommended input power (W)
4*200~310
MPPT voltage range (V)
27~48
Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
4*10.5
Maximum short circuit current limit (A)
4*15

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Output Data (AC)
Rated output power (W)
1000
Rated output current (A)
4.17@240V a.c.,4.81@208V a.c.
Nominal output voltage/range (V)
240/211.2-264,208/183-228.8
Nominal frequency/range (Hz)
60/59.3-60.5
Power factor
>0.99
Output current harmonic distortion
<3%
Max. inverter backfeed current to the
array (A)
0
Maximum output overcurrent
protection (A)
20
Maximum output fault current
55.2 Apk, 184.67 ms of duration, 7.46
Arms
Maximum Units per 20A Branch
4@240V a.c., 3@208V a.c.
Efficiency
Peak inverter efficiency
96.5%
CEC weighted efficiency
96.0%
Nominal MPPT efficiency
99.8%
Night time power consumption (mW)
<50
Mechanical Data
Ambient temperature range (℃)
-40 ~ +65
Storage temperature range (℃)
-40 ~ +85
Relative humidity (%RH)
0-100% condensing

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Maximum operating altitude without
derating (m)
2000
Dimensions (W×H×D mm)
280×176×33
Weight (kg)
3.75
Enclosure rating
Type 6, outdoor use
Cooling
Natural convection – No fans
Compliance
UL1741/IEEE1547, FCC Part 15 Class
B, CSA-C22.2 NO.107.1-16
This product is CSA Listed as PV
Rapid Shut Down Equipment and
conforms with NEC-2014 and
NEC-2017 Article 690.12 and
CEC-2018 Sec 64-218 Rapid
Shutdown of PV Systems, for AC and
DC conductors, when installed
according manufacturer’s instructions.
Integrated ground (no GEC required)
The DC circuit meets the requirements
for ungrounded PV arrays in NEC
690.35.
Features
Communication
Wireless
Design Life
>25 years
1Volatage and frequency ranges can be extended beyond nominal if required
by the utility
Model
MI-1200
Input data(DC)
Recommended input power (W)
4*200~350
MPPT voltage range (V)
32~48

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Operating voltage range (V)
16~60
Maximum input voltage (V)
60
Maximum input current (A)
4*10.5
Maximum short circuit current limit (A)
4*15
Output Data (AC)
Rated output power (W)
1200
Rated output current (A)
5.00@240V a.c.,5.77@208V a.c.
Nominal output voltage/range (V)
240/211.2-264, 208/183-228.8
Nominal frequency/range (Hz)
60/59.3-60.5
Power factor
>0.99
Output current harmonic distortion
<3%
Max. inverter backfeed current to the
array (A)
0
Maximum output overcurrent
protection (A)
20
Maximum output fault current
57.4Apk, 182.30 ms of duration, 7.89
Arms
Maximum Units per 20A Branch
3@240V a.c., 3@208V a.c.
Efficiency
Peak inverter efficiency
96.5%
CEC weighted efficiency
96.0%
Nominal MPPT efficiency
99.8%
Night time power consumption (mW)
<50

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Mechanical Data
Ambient temperature range (℃)
-40 ~ +65
Storage temperature range (℃)
-40 ~ +85
Relative humidity (%RH)
0-100% condensing
Maximum operating altitude without
derating (m)
2000
Dimensions (W×H×D mm)
280×176×33
Weight (kg)
3.75
Enclosure rating
Type 6, outdoor use
Cooling
Natural convection – No fans
Compliance
UL1741/IEEE1547, FCC Part 15 Class
B, CSA-C22.2 NO.107.1-16
This product is CSA Listed as PV
Rapid Shut Down Equipment and
conforms with NEC-2014 and
NEC-2017 Article 690.12 and
CEC-2018 Sec 64-218 Rapid
Shutdown of PV Systems, for AC and
DC conductors, when installed
according manufacturer’s instructions.
Integrated ground (no GEC required)
The DC circuit meets the requirements
for ungrounded PV arrays in NEC
690.35.
Features
Communication
Wireless
Design Life
>25 years
1Voltage and frequency ranges can be extended beyond nominal if required
by the utility