Une ZHERO User manual

UNE ZHERO
MANUAL
Ver. 0.1
UNE SRL - VIA MODENA 48/E –42015 CORREGGIO (RE) - ITALY - VAT No. 02513460358 -
T.+39 0522 693566 - F. [phone] - [e-mail] –https://www.unesrl.com

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Summary
1. INFORMATION ABOUT THIS DOCUMENT................................................................................................................4
1.1. Scope ...............................................................................................................................................................4
1.2. Warranty and supply conditions........................................................................................................................5
1.3. Symbols used ...................................................................................................................................................6
1.4. Symbols affixed to the frame of UNE ZHERO ...................................................................................................7
1.5. Glossary and definitions ...................................................................................................................................8
1.6. Recipient qualifications ..................................................................................................................................11
2. CONDITIONS OF USE .............................................................................................................................................13
2.1. Limitations on use ..........................................................................................................................................13
3. UNE ZHERO CHARACTERISTICS ...........................................................................................................................15
3.1. Overview.........................................................................................................................................................15
3.2. Wiring Diagram ...............................................................................................................................................19
3.3. Technical data ................................................................................................................................................19
3.4. UNE ZHERO nameplate...................................................................................................................................19
4. SAFETY WARNINGS...............................................................................................................................................20
4.1. General information........................................................................................................................................20
4.2. Personal protection ........................................................................................................................................23
4.3. System............................................................................................................................................................24
4.4. Residual risks .................................................................................................................................................26
4.5. Hazard reporting.............................................................................................................................................26
5. INSTALLATION ......................................................................................................................................................27
5.1. Lifting and transport .......................................................................................................................................27
5.2. Tools required for installation.........................................................................................................................29
5.3. Environmental and general installation conditions .........................................................................................30
5.4. UNE ZHERO Positioning .................................................................................................................................31
5.5. Unpacking.......................................................................................................................................................32
5.6. Preliminary operations before proceeding to electrical connection................................................................33
5.7. General connection diagram of the machine ..................................................................................................38
5.8. Internal overview and overview of the ZHERO panel.......................................................................................42
5.9. Connection description...................................................................................................................................44
5.9.1. UNE ZHERO connection to the photovoltaic generator............................................................................44
5.9.2. Installing or changing the batteries .........................................................................................................47
5.9.3. UNE ZHERO - AC Connection to the Distributor grid/Genset –“Backup” .................................................50
5.9.4. Connecting the production meter ............................................................................................................54
5.9.5. Meters connection...................................................................................................................................56

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5.9.6. Internet connection .................................................................................................................................70
6. STARTING THE MACHINE .....................................................................................................................................72
6.1. Turning the system on ....................................................................................................................................72
6.2. Checking the correct operation of the system ................................................................................................74
6.2.1. ZHERO Installer Tool ...............................................................................................................................75
7. SYSTEM OPERATION.............................................................................................................................................76
7.1. Recommendations for optimal Monofase use................................................................................................76
7.2. Monitoring ......................................................................................................................................................78
7.2.1. Webserver ...............................................................................................................................................78
7.2.2. Webapp ...................................................................................................................................................87
7.3. UNE ZHERO functions ....................................................................................................................................98
7.3.1. “Monofase” function................................................................................................................................98
7.3.2. "Cyclic load" function...............................................................................................................................98
7.3.3. "Charge hysteresis" function....................................................................................................................98
7.3.4. Photovoltaic energy management...........................................................................................................99
7.3.5. Blackout ..................................................................................................................................................99
7.3.6. Power ramp .............................................................................................................................................99
7.3.7. Warmup, battery charging and discharging ...........................................................................................100
7.3.8. System in stand-by ................................................................................................................................100
7.3.9. Off-Grid operation..................................................................................................................................101
7.3.10. Retrofit –Ibrido operation..................................................................................................................101
7.4. Security checks ............................................................................................................................................102
7.4.1. Insulation test........................................................................................................................................102
7.4.2. Differential circuit breaker of the machine.............................................................................................103
8. WHAT TO DO IN THE EVENT OF A FAILURE OR ERROR.......................................................................................104
8.1. Indication of anomaly ...................................................................................................................................104
8.2. Most common anomalies.............................................................................................................................106
8.2.1. Low insulation resistance......................................................................................................................106
8.2.2. String error ............................................................................................................................................107
8.2.3. Battery error...........................................................................................................................................107
8.2.4. Controller error ......................................................................................................................................108
8.2.5. Inverter error..........................................................................................................................................108
8.2.6. Ethernet communication error...............................................................................................................109
8.2.7. System bypass ......................................................................................................................................111
8.2.8. Breakdown of differential magnetothermic on board-machine .............................................................111
8.2.9. Failure to connect to the distributor / generator network ......................................................................112
9. TECHNICAL SUPPORT.........................................................................................................................................113

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10. MAINTENANCE AND UPDATE..........................................................................................................................114
10.1. Batteries maintenance ..............................................................................................................................115
10.2. Controller maintenance.............................................................................................................................117
10.3. Inverter maintenance ................................................................................................................................118
10.4. System update ..........................................................................................................................................119
11. DISPOSAL ........................................................................................................................................................121
12. ANNEXES .........................................................................................................................................................122
System alarm and error table ..................................................................................................................................123
MANUALS ATTACHED TO UNE ZHERO ......................................................................................................................128

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1. INFORMATION ABOUT THIS DOCUMENT
Installer
Maintenance
technician
User
This manual contains important safety instructions that must be followed when using UNE ZHERO.
The original language of this document is Italian; in case of inconsistencies or doubts, please request the original
document from UNE srl.
These instructions for use are intended for all UNE ZHERO installers, maintenance technicians and users, with the
purpose of providing guidance for the correct use of the system in order to render it as efficient as possible.
These instructions are an integral part of UNE ZHERO; the product cannot be supplied without this document since
it must be available at all times to those who use the equipment.
Please keep in mind that UNE ZHERO can be used only by those who have read and understood this manual in its
entirety; if in doubt, please contact your supplier for clarification.
UNE srl shall not be liable for any damage to persons and/or property as a result of operations conducted on the
system in a manner other than that indicated in this manual.
For information on how to install UNE ZHERO, please refer to the instructions supplied with the equipment.
1.1. Scope
Installer
Maintenance
technician
User
These instructions for the installation, maintenance and use of UNE ZHERO apply to all firmware versions.
You can find the firmware version of your device in your dedicated section on www.portal.zherosystem.com
or in the info section of the webapp installed on your smartphone/tablet.
This product can be used only within its intended scope, i.e. only in residential, commercial and light industrial
applications, in 230V (single-phase) 50 Hz TT and TN-S (electricity distribution networks).
For further information and questions, please contact UNE srl via the channels shown in the contact section.

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1.2. Warranty and supply conditions
Installer
Maintenance
technician
User
The warranty conditions can be found in a dedicated document supplied with the equipment; in particular, the
warranty conditions are valid only if:
•The installer and the maintenance technician respect the instructions in this manual;
•NO unauthorised operations or operations that are inconsistent with this document are performed on UNE
ZHERO;
•Any “open casing” operations to be performed on UNE ZHERO are conducted only by authorised staff;
•NO changes are made to UNE ZHERO.
UNE srl shall NOT be held liable for any defect or malfunction resulting from improper use of the equipment;
from transport damage or damage due to environmental conditions; from lack of or inadequate maintenance;
from tampering or poor repair work; from installation or maintenance performed by unauthorised persons.
Also, UNE srl disclaims all liability for damage in the event of failure to comply with the Monofase for proper
installation in force in the country where the machine is installed.

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1.3. Symbols used
Installer
Maintenance
technician
User
This symbol indicates a danger.
Failure to comply with the information marked with this symbol may result in a fatal
danger and cause damage to the device.
This symbol indicates caution.
Failure to comply with the information marked with this symbol may hinder the correct
execution of the work phases and prevent the optimal operation of the device.
This symbol indicates careful reading.
The recommendations marked with this symbol may facilitate the use of UNE ZHERO
and improve its performance, depending on its place of installation.
This symbol indicates an example.
Here you will find other examples of concrete circumstances.
This symbol marks a chapter intended to be read by the installers of UNE ZHERO.
This symbol marks a chapter intended to be read by the maintenance technicians of
UNE ZHERO.
This symbol marks a chapter intended to be read by the end user of UNE ZHERO.

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1.4. Symbols affixed to the frame of UNE ZHERO
Installer
Maintenance
technician
User
This symbol indicates an obligation to read the manual carefully before installing
or starting using UNE ZHERO.
This symbol warns the operator about the presence of electrical hazards inside the
system.
This symbol prohibits the use of water to extinguish fires.
This symbol represents the operating range of the system; for UNE ZHERO it
extends from -10 to + 40 °C.
This symbol indicates a danger of electric shock; before carrying out any other
operation, turn off the device and wait for the indicated time before proceeding.
This symbol indicates the degree of electrical protection of UNE ZHERO.
This symbol warns the operator about the presence of hazards associated with
hot surfaces inside the system.
This symbol indicates that the operator must consult the manual supplied with the
device.
The device contains a toroidal transformer.

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1.5. Glossary and definitions
Installer
Maintenance
technician
User
The terms used throughout this document are common; please refer to the definitions below:
Glossary
ELECTRICAL DEVICE
An object that absorbs electricity as part of its normal operation.
BMS
Battery Management System.
DIRECT CURRENT
Type of current produced by the photovoltaic modules, used to power the batteries.
ALTERNATING CURRENT
Type of output current produced by the inverter, which can be used in Monofase power
grids.
DEALER
Your UNE ZHERO supplier.
FIRMWARE
The firmware is a program, a sequence of instructions, built directly into an electronic
component, in the broadest sense of the term (integrated circuits, electronic boards,
peripheral devices). Its purpose is to start the component and enable it to interact with
other hardware components by implementing communication protocols or
programming interfaces.
INSTALLER
The person who, after appropriate training, has the skills and the ability to work on UNE
ZHERO.
INVERTER
An inverter is an electronic equipment that converts direct current into alternating
current.
RADIATION
In thermodynamics and electromagnetism, radiation means the transfer of energy
between two bodies by means of electromagnetic waves; e.g. the sunlight that arrives
at the surface of the photovoltaic modules.
LED
In electronics,a light-emitting diode (LED) is an optoelectronic device that uses the
optical properties of some semiconductor materials to generate light.
IΔn
Leakage current used by the residual current device
PHOTOVOLTAIC
GENERATOR
An assembly of suitably connected photovoltaic modules that provides energy to your
system.
LOCAL GRID OPERATOR
The local grid operator is the legal entity that manages the electricity distribution
network at the place of reference.
OFF-GRID SYSTEM
(STAND-ALONE)
System completely independent of the national power grid, not in parallel with the power
grid of the local distributor.
GRID-CONNECTED
SYSTEM
Traditional photovoltaic system, in parallel with the power grid of the local distributor.
ROUTINE
MAINTENANCE
System inspection intended to check its condition and restore its original operating
conditions and performance. Routine maintenance is conducted at specific intervals.
EXTRAORDINARY
MAINTENANCE
Work intended to restore the condition of the system following a malfunction or
performance degradation.
PHOTOVOLTAIC MODULE
A photovoltaic module is an optoelectronic device consisting of photovoltaic cells, able
to convert the sunlight to which it is exposed into electricity by means of the photovoltaic
effect; photovoltaic modules are usually used as current generators in photovoltaic
systems.

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MPPT
MAXIMUM POWER POINT TRACKER is an algorithm that optimises the energy input
from the modules by attempting to adapt the generator to the load by varying the
voltage/current ratio in such a way that the operating point corresponds to the maximum
power point.
PARALLEL WITH THE
POWER GRID
Condition under which a system can supply the produced energy to the grid of the local
grid operator.
AVAILABLE POWER
The amount of power that the system can deliver at the same time.
SPD
Surge protection device.
STANDBY
The standby mode is that condition under which electric/electronic devices do not
operate but are ready to switch from the temporary deactivated state to the operating
state.
USER
Subject who benefits from the services offered by UNE ZHERO.
BACKUP
Function that allows in case of a blackout by the distributor network to keep one or more
lines in your home powered.
WORKING MODE
UNE ZHERO working mode; depending on its programming, it can be Off-Grid, On-Grid
with backup.
PROTECTION INTERFACE
System for disconnecting the photovoltaic system in the event of network anomalies
(SPI or NS protection).
RETROFIT
Installation of a storage system, in the electrical system, capable of charging its
batteries from a pre-existing external photovoltaic generator.
EXCHANGE COUNTER
Bidirectional energy meter, installed by the electricity service provider, capable of
measuring the energy withdrawn and sold on the network.
PRODUCTION COUNTER
Bidirectional energy meter, installed by the electricity service provider, capable of
measuring the energy produced by the photovoltaic plant.
EXCHANGE METER
Bidirectional energy meter, provided by UNE, capable of measuring the energy
withdrawn and sold on the network.
PRODUCTION METER
Bidirectional energy meter, provided by UNE, capable of measuring the energy produced
by the photovoltaic plant.