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