YOUESS U Series User manual

Solar charge inverter
USER MANUAL
Hybrid Inverter
ln order to prevent improper operation before use, please carefully read this manual.

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9.2 GENERATOR OPERATION NOTES ............................................................................................................61
9.3 GENERATOR SETTING .................................................................................................................................61
10. INVERTER PARALLEL GUIDE........................................................................................................................... 63
10.1 PARALLEL SYSTEM DIAGRAM ................................................................................................................. 63
10.2 PARALLEL COMMUNICATION CABLE CONNECTION...................................................................... 67
10.3 PARALLEL OPERATION NOTES............................................................................................................... 67
10.4 PARALLEL SYSTEM SETTING ................................................................................................................... 68
11. ADVANCED MODE OPERATION GUIDE ..................................................................................................... 69
11.1 ADVANCED MODE INTRODUCTION..................................................................................................... 69
11.2 ADVANCED MODE SETTING................................................................................................................... 70
12. FAULT DIAGNOSIS AND SOLUTIONS.......................................................................................................... 72
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CONTENTS
1. NOTES ON THIS MANUAL................................................................................................................................. 3
1.1 SCOPE OF VALIDITY....................................................................................................................................... 3
1.2 TARGET GROUP.............................................................................................................................................. 3
1.3 SYMBOLS USED.............................................................................................................................................. 3
2. SAFETY.................................................................................................................................................................... 4
2.1 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 4
2.2 EXPLANATION OF SYMBOL ....................................................................................................................... 8
3. INTRODUCTION ................................................................................................................................................... 9
3.1 BASIC FEATURES ............................................................................................................................................ 9
3.2 SYSTEM DIAGRAM........................................................................................................................................ 9
3.3 WORK MODES ..............................................................................................................................................12
3.4 DIMENSION ................................................................................................................................................... 13
3.5 TERMINALS OF PV INVERTER ...................................................................................................................14
4. TECHNICAL PARAMETERS................................................................................................................................16
4.1 INVERTER SPECICATION .............................................................................................................................16
5. INSTALLATION ..................................................................................................................................................... 18
5.1 CHECK FOR PHYSICAL DAMAGE ..............................................................................................................18
5.2 PACKING LIST ................................................................................................................................................18
5.3 MOUNTING ...................................................................................................................................................18
6. ELECTRICAL CONNECTION ............................................................................................................................ 22
6.1 PV CONNECTION ........................................................................................................................................ 22
6.2 GRID CONNECTION (GEN CONNECTION) .......................................................................................... 23
6.3 BACK-UP:LOAD1 AND LOAD2 CONNECTION ...................................................................................... 24
6.4 BATTERY CONNECTION............................................................................................................................ 26
6.5 WIFI CONNECTION (OPTIONAL)............................................................................................................ 28
6.6 GPRS CONNECTION (OPTIONAL).......................................................................................................... 28
6.7 CT INSTALLATION INSTRUCTIONS......................................................................................................... 29
6.8 E-STOP INSTALLATION .............................................................................................................................. 30
7. LCD OPERATION .................................................................................................................................................31
7.1 CONTROL PANEL .......................................................................................................................................... 31
7.2 INSTRUCTIONS FOR LED INDICATOR.....................................................................................................31
7.3 INSTRUCTIONS FOR THE USE OF THREE MODES ............................................................................. 32
8. LCD OPERATION ................................................................................................................................................ 35
8.1 LCD INTERFACE ............................................................................................................................................ 35
9. GENERATOR USE OPERATION GUIDE........................................................................................................... 59
9.1 GENERATOR USE DIAGRAM...................................................................................................................... 59

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1 Notes on this Manual
1.1 Scope of Validity
This manual is an integral part of Hybrid, it describes the assembly, installation,
commissioning, maintenance, and failure type of the product. Please read it
carefully before operating.
Naming rules, For example: U-5K-L1
“5k”means “output power 5kw ”.
“L1”means “Low Voltage Output single-phase ”
“U” means “North America”
Store this manual where it will be always accessible.
1.2 Target Group
This manual is for qualified electricians. The tasks described in this manual only can
be performed by qualified electricians.
1.3 Symbols Used
The following types of safety instructions and general information appear in this
document as described below:
U-5K-L1 U-6K-L1 U-8K-L1 U-10K-L1
D anger！
“Danger “indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
Warning!
“Warning “indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
Caution！
“Caution” indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
Note！
“Note” provides tips that are valuable for the optimal operation of ours.
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2 Safety
2.1 Important Safety Instructions
Danger!
Danger to life due to high voltages in the inverter!
All work must be carried out by qualified electrician.
The appliance is not to be used by children or persons with reduced
physical sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction.
Children should be supervised to ensure that they do not play with
the appliance.
Caution!
Danger of burn injuries due to hot enclosure parts!
During operation, the upper lid of the enclosure and the enclosure
body may become hot.
Only touch the lower enclosure lid during operation.
Caution!
Possible damage to health as a result of the effects of
radiation !
Do not stay closer than 20 cm to inverter for any length of time.
Warning!
Ensure input DC voltage ≤Max. DC voltage. Over voltage may cause
damage.
Permanent damage to inverter or other losses, which will not be
included in warranty!
Note!
Grounding the PV generator.
Comply with the local requirements for grounding the PV modules and
the PV generator. It is recommends connecting the generator frame
and other electrically conductive surfaces in a manner which ensures
continuous conduction and ground these in order to have optimal
protection of system and persons.

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3. Introduction
3.1 Basic features
Hybrid Series is a high-quality inverter which can convert solar energy to AC energy
and store energy into battery.
The inverter can be used to optimize self-consumption, store in the battery for
future use or feed in to public grid. Work mode depends on PV energy and user’s
preference. It can provide power for emergency use during the grid lost by using
the energy from battery and inverter (generated from PV).
3.2 System Diagram
Hybrid Series is designed with two BACK-UP versions for customer to choose based
on the local rules. The applies to the wiring rules that requires Neutral line of
alternative supply must NOT be isolated or switched.
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2.2 Explanation of Symbol
This section gives an explanation of all the symbols shown on the inverter and on
the type label.
Symbols on the Type Label
UL certified
This symbol indicates that you should wait at least 5mins after disconnecting the
inverter from the utility grid and from the PV panel before touching any inner live
parts.
eep dry! The package/product must be protected from excessive humidity
and must be stored under cover
.
Refer to the operating instructions.
ragile - The package/product should be handled carefully and never
be tipped over or slung.
Products should not be disposed as household waste.
No more than six(6) identical packages being stacked on each other
Components of the product can be recycled.
Danger of hot surface!
Danger of high voltage and electric shock!
Caution! Failure to observe a warning indicated in this manual may result in injury

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All switches and RCD devices in the figure are for reference only, and the specific
installation shall be subject to local regulations.
Note!
Please control the home loads, and make sure it’s within
the “BACK-UP output rating” under BACK-UP mode,
otherwise the inverter will shut down with an “overload fault”
warning.
Please confirm with the mains grid operator whether there
is any special regulations for grid connection.
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Note!
The arrow on the CT points to the power grid, as shown.
If the CT connector is improperly connected, the inverter
cannot read the data correctly, so that the relevant working
conditions cannot be realized normally.
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3.3 Work Modes
Inverter provides multiple work modes based on different requirements.
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In addition to the above three basic modes, there is also an “Advanced Mode”.
Please refer to Chapter 11 for details.
3.4 Dimension
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3.5 Terminals of PV inverter
L
* Port Function
CAN1/CAN2: Communication interface for connecting inverters.
RS485: Read the internal data of inverter.
BMS-485/ BMS-CAN: BMS communication for lithium batteries.
CT L1/CT L2: For external grid side CT to detect current size.
TYPE-C UPDATE: Update machine software locally on PC via USB-A port.
Grid EPS Alarm Fault
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Object
Description
A
A
DC switch
B
BAT input
C
Wi-Fi
D
CAN1/CAN2/RS485/BMS485,BMSCAN/CTL1/CTL2/Type-c upgrade
E
PV1~PV4 input
F
Generator
G
Grid
H
BACK-UP1 output
I
PE
J
BACK-UP2 output
K
LCD
L
RSD button
WARNING !
Qualified electrician will be required for the

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4. Technical Parameters
4.1 Inverter specication
Technical Data U-5K-L1
PV Input Data
MAX.DC Input Power 7.5kW 9kw 12KW 15kW
NO.MPPT Tracker 4
MPPT Range 120 - 500V
MAX.DC Input Voltage 500V
MAX.Input Current 12A
Battery Input Data
Nominal voltage (Vdc) 48V 48V 48V 48V
MAX.Charging/Discharging Current 120A/120A 135A/135A 190A/190A 210A/210A
Battery Voltage Range 40-60V
Battery Type Lithium and Lead Acid Battery
Charging Strategy for Li-Ion Battery Self-adaption to BMS
AC Output Data(On-Grid)
Nominal output power Output to Grid 5kVA 6kVA 8kVA 10kVA
MAX. Apparent Power Output to Grid 5.5kVA 6.6kVA 8.8kVA 11kVA
Output Voltage Range 110-120/220-240V split phase, 1Ø, 230 1 phase
Output Frequency 50/60Hz（45 to 54.9Hz / 55 to 65Hz）
Nominal AC Current Output to Grid 20.8A 25A 33.3A 41.7A
Max.AC Current Output to Grid 22.9A 27.5A 36.7A 45.8A
Output Power Factor 0.8leading…0.8lagging
OutPut THDI < 2%
AC Output Data(Back-Up)
Nominal. Apparent Power Output 5kVA 6kVA 8kVA 10kVA
MAX. Apparent Power Output 5.5kVA 6.6kVA 8.8kVA 11kVA
Nominal Output Voltage L-N/L1-L2 120/240V
Nominal Output Frequency 60Hz
Output THDU < 2%
Efficiency
Europe Efficiency >=97.8%
MAX. Battery to Load Efficiency >=97.2%
Protection
Grounding detection YES
Arc Fault Protection YES
Island Protection YES
Battery reverse Polarity YES
U-6K-L1 U-8K-L1 U-10K-L1
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Insulation Resistor Detection YES
Residual Current Monitoring Unit YES
Output Over Current Protection YES
Back-up Output Short Protection YES
Terminal temperature detection YES
Output Over Voltage Protection YES
Output Under Voltage Protection YES
General Data
Output Conduit 25.4mm
PV Input Conduit 25.4mm
BAT Input Conduit 34.5mm
Operating Temperature Range -25 ~ +60°C
Relative Humidity 0-95%
Operating Altitude 0~4000m
Ingress Protection IP65/NEMA 3R
Weight 41kg
Size (Width*Height*Depth） 430mm x 710mm x 225mm
Cooling Natural Convection
Noise emission <38dB
Display LCD
Communication With BMS/Meter/EMS RS485，CAN
Supported communication interface RS485, WLAN, 4G (optional)
Self-consumption at night < 2.5 W (with battery enabling < 5 W)
Safety UL1741SA all options, UL1699B, CSA 22.2
EMC FCC Part 15 Class
Grid connection standards IEEE 1547, IEEE 2030.5, Hawaii Rule 14H, Rule 21 Phase I,II,III

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site meets the following conditions:
Not in direct sunlight.
Not in areas where highly Flammable materials are stored.
Not in potential explosive areas.
Not in the cool air directly.
Not near the television antenna or antenna cable.
Not higher than altitude of about 2000m above sea level.
Not in environment of precipitation or humidity (＞95%).
Under good ventilation condition.
The ambient temperature in the range of -20℃ to +60℃.
The slope of the wall should be within ± 5° .
The wall hanging the inverter should meet conditions
below:
1.solid brick/concrete, or strength equivalent mounting surface;
2.Inverter must be supported or strengthened if the wall’s strength isn’t
enough(such as wooden wall, the wall covered by thick layer of decoration)
Please AVOIDE direct sunlight, rain exposure, snow laying up during installation
and operation.
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5. Installation
5.1 Check for Physical Damage
Make sure the inverter is intact during transportation. If there is any visible damage,
such as cracks, please contact your dealer immediately.
5.2 Packing List
Open the package and take out the product, please check the accessories first .The
packing list shown as below.
A B C
D E F G
5.3 Mounting
Installation Precaution
Inverter is designed for outdoor installation (IP 65).Make sure the installation
Object
Description
A
Inverter
B
Expansion screws and pan-head screws
C
CT( inner radius 16mm)
D
GPRS module (optional)
E
WiFi module (optional)
F
User manual
G
CT（inner radius 35mm/optional）
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Space Requirement
Mounting
Tools required for installation.
Installation tools : crimping pliers for binding post and RJ45, screwdriver,
manual wrench etc
Step 1: Drill 4 holes in the wall according to the following distance dimensions,
50~60mm depth. Then use a proper hammer to fit the expansion bolt into the holes.
Step 2: Lift up the inverter and align the hole of the inverter with the expansion bolt,
Fix the inverter on the wall.
Step 3: Tighten the nut of expansion bolt，and install an anti-theft lock on DC switch
of the inverter
Position Min. size
Left
300mm
Right 300mm
Top 500mm
Bottom 500mm
Front
1000mm
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Grid EPS Alarm Fault
Grid
EPS
Alarm
Fault
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Step 4: Remove the cover screws by Allen Wrench and remove the cover. Remove
the waterproof cover by a flat blade screwdriver. Wiring box conduit plugs, Conduit
plugs are provided for 1 inch conduit fittings. If used conduit fitting is not 1 inch,
an appropriate conduit adaptor should be used.
Step 5: Pass the corresponding conduit and fasten the joint.
Grid
EPS
Alarm
Fault
Grid EPS Alarm Fault