Rayleigh Instruments RI-ENERGY 3.0D User manual

RI-ENERGYFLOW-MIDI Series
MIDI Inverters
3.0D | 3.6D | 4.0D | 4.6D
| 5.0D |6.0D
User Manual
Rayleigh Instruments Limited (Head Office)
RaytelHouse,CutlersRoad,SouthWoodhamFerrers,Chelmsford,EssexCM35WA.UK.
E: [email protected]
Rayleigh Instruments Limited SP. Z o.o. (European Office).
Ul. Aleje Jerozolimskie 214, Warsaw, Poland, 02-486.
E: [email protected]
www.Rayleigh.com www.Rayleigh.pl

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Contents
1. Introduction………………………………………………………………………………………………………….. 4
1.1 Product description…………………………………………………………………………………………….. 4
1.2Packing……………………………………………………………………………………………………………4
1.3 Optional Packing……………………………………………………………………………………………….. 5
2. Safety instructions………………………………………………………………………………………………….. 5
2.1 Applied designations…………………………………………………………………………………………… 6
2.2 Notice for use…………………………………………………………………………………………………… 6
2.3 Important Safety Information………………………………………………………………………………….. 7
2.4 System sizing…………………………………………………………………………………………………… 7
3. Overview…………………………………………………………………………………………………………….. 8
3.1 Front Panel Display…………………………………………………………………………………………….. 8
3.2 LED Status Indicator Light…………………………………………………………………………………….. 8
3.3 Keypad (Optional)……………………………………………………………………………………………… 8
3.4 LCD (Optional)……………………………………………………………………………………………...….. 9
4. Installation…………………………………………………………………………………………………………… 9
4.1 Select a Location for the Inverter………………………………………………………………………………9
4.2 Mounting the Inverter……………………………………………………………………………………….... 10
4.3 Electrical Connections……………………………………………………………………………………..…. 11
5. Start&Stop…………………………………………………………………………………………………….…….19
5.1 Start the Inverter………………………………………………………………………………………..………19
5.2 Stop the Inverter……………………………………………………………………………………..…………19
6. Operation………………………………………………………………………………………………..…………..19
6.1 Setup-Technicians Only…………………………………………………………………………..………….. 20
6.2 INQUIRE…………………………………………………………………………………………..…………… 21
6.3 Statistics………………………………………………………………………………………….……………. 22
7. Maintenance……………………………………………………………………………………….……………… 22
8. Troubleshooting………………………………………………………………………………….……………….. 22
9. Specifications………………………………………………………………………………….………………….. 24
10. Quality Assurance………………………………………………………………………….…………………… 25

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1. Introduction
1.1 Product description
This manual describes solar inverters:
RI-ENERGYFLOW-MIDI-3.0D /3.6D /4.0D /4.6D /5.0D /6.0D.
Figure 1.1 Front and side view
Figure 1.2 Bottom side view
Object
Description
DVC class
1
PV1, PV2
DVC C
2
AC OUTPUT
DVC C
3
DRM
DVC A
4
CT
DVC A
5
COM
DVC A
1.2 Packing
When you receive the inverter, ensure that all the parts listed below are included:

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Part
Description
Number
1
PV grid tie inverter
1
2
Wall/pole bracket
1
3
Locking screws
2
4
DC connector
2pairsfor RI-ENERGYFLOW-
MIDI
5
AC connector
1
6
Manual
1
7
OT terminal
1
8
Explpsion-proof screws
3
1.3 Optional Packing
Part
Description
Number
1
DRM connector
1
2
CT connector
1
3
WiFi/GPRS Stick
1
4
1xCT and com cable
1
2. Safety instructions:
Please read the safety instructions in this manual. Throughout the manual it is assumed that the reader is
familiar with AC and DC installations and knows the rules and regulations for electrical equipment and for
connecting it to the utility AC grid. It is especially important to be familiar with the general safety rules for
working with electrical equipment.

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2.1 Applied designations
Throughout the manual important information is shown at different levels depending on the character of the
information, as shown here:
Safety information important for human safety. Violation of warnings may result in injury
to persons or death.
Danger of high voltage and electric shock!
Signals danger due to electrical shock and indicates the time (5 minutes) to allow after
the inverter has been turned off and disconnected to ensure safety in any installation
operation.
Danger of hot surface!
Product should not be disposed as normal household waste.
Conformity with the applicable requirements for products sold within Europe.
Conformity with the applicable requirements for products sold within Great Britain.
Information important for the protection of property. Violation of this type of information
may cause damage and loss of property.
RoHS
Useful additional information or “Tips and Tricks" on specific subjects.
ROHS Mark.
2.2 Notice for use
The inverter has been constructed according to the applicable safety and technical guidelines.
Use the inverter in installations that meet the following specifications ONLY:
1.Permanent installation is required.
2.The electrical installation must meet all the applicable regulations and standards.
3.The inverter must be installed according to the instructions stated in this manual.
4.The inverter must be installed according to the correct technical specifications.
5.To startup the inverter, the Grid Supply Main Switch (AC) must be switched on, before the solar panel's DC
isolator shall be switched on. To stop the inverter, the Grid Supply Main Switch (AC) must be switched off
before the solar panel's DC isolator shall be switched off.

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2.3 Important Safety Information
Read this before installing, operating or maintaining the inverter.
Before installation:
Check for damage to inverter and packaging. If you are in doubt, please contact your
supplier beforeinstalling the inverter.Check the voltages of the solar modulesand make
sure they are within the limits of the inverter specifications before connecting them to the
inverter.
Installation:
Only trained and authorized personnel familiar with local electrical codes may install the
inverter. For optimum safety, please follow the steps described in this manual. Keep in
mind that the inverter has two voltage carrying sides, the PV input and the AC grid.
Disconnecting the inverter:
Always disconnect the AC line first! Afterwards disconnect the PV lines. Note that the
inverter can still be charged with very high voltages at hazardous levels even when it is
disconnected from grid and solar modules. Wait at least 5 min. before proceeding, after
having disconnected from grid and PV panels.
Operating the inverter:
Before connecting the AC grid to the inverter, make sure that the installation cover is
mounted again. The inverter must not be open during operation.
Maintenance and modification:
Only authorized personnel are allowed to repair or modify the inverter. To ensure
optimum safety for user and environment, only the original spare parts available from
your supplier should be used.
Functional safety parameters:
Unauthorized changes of functional safety parameters may cause injury or accidents to
people or inverter. Additionally it will lead to the cancelling of all inverter operating
approval certificates.
2.4 System sizing
When dimensioning a photovoltaic system, it must be ensured that the open-circuit
voltage of the PV string never exceeds the maximum permissible input voltage. For
3.0D, 3.6D, 4.0D, 4.6D, 5.0D and 6.0D series inverters, the maximum input voltage
is 600V DC. Higher voltages may result in permanent damage to the inverter.
The selection of PV string output should be based on the optimum utilization of the invested capital compared
to the expected annual energy yield from the system. This optimization depends on local weather conditions
and should be considered in each individual case.
The inverter incorporates an input power limiting device, which automatically keeps the power at levels that are
safe for the inverter. The limitation depends mainly on internal and ambient temperatures. The limitation is
calculated continuously and always allows the maximum possible amount of energy to be produced.
Please use the tool supplied by Rayleigh Instruments when dimensioning a photovoltaic system.

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3. Overview
3.1 Front Panel Display
LCD display is Optional
Figure 3.1 Front Panel Display
3.2 LED Status Indicator Light
The LED status indicator can display red and green. When the indicator light is on, it indicates that there is
power. When the indicator light is red, it indicates the alarm state; when the indicator light is green, it indicates
the operation state.
Light
Status
Description
ON
Alarm or fault condition is
detected.
ON
The inverter is operating
properly.
Flashing
Grid Connected countdown
Table 3.1 Status Indicator Light
3.3 Keypad (Optional)
There are four keys in the front panel of the Inverter from left to right: ESC,UP, DOWN and ENTER keys. The
keypad is used for:
• Scrolling through the displayed options (the UP and DOWN keys);
• Access to modify the adjustable settings (the ESC and ENTER keys).

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3.4 LCD (Optional)
The four-line Liquid Crystal Display (LCD) is located on the front panel of the Inverter, which shows the following
information:
• Inverter operation status and data;
• Service messages for operator;
• Alarm messages and fault indications.
You can also get information via WiFi / GPRS.
4. Installation
4.1 Select a Location for the Inverter
To selects location for the inverter, the following criteria should be considered:
• Do not install in small closed spaces where air can not circulate freely. To avoid overheating, always make
sure the flow of air around the inverter is not blocked.
• Exposure to direct sunlight will increase the operational temperature of the inverter and may cause output
power limiting. Rayleigh Instruments recommends inverter installed to avoid direct sunlight or raining.
• To avoid overheating ambient air temperature must be considered when choosing the inverter installation
location. Rayleigh Instruments recommends using a sunshade to minimise direct sunlight when the ambient air
temperature around the unit exceeds 104°F/40°C.
Figure 4.1 Recommended Installation locations
• Install on a wall or strong structure capable of bearing the weight.
• Install vertically with a maximum incline of +/-5° . If the mounted inverter is tilted to an angle greater than
the maximum noted, heat dissipation can be inhibited, and may result in less than expected output power.
• When 1 or more inverters are installed in one location, a minimum 300mm clearance should be kept
between each inverter or other object. The bottom of the inverter should be 500mm clearance to the ground.
Figure 4.2 Inverter Mounting clearance
• Visibility of the LED status indicator lights and the LCD located at the front panel of the inverter should be
considered.

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• Adequate ventilation must be provided if the inverter is to be installed in a confined space.
Nothing should be stored on or placed against the inverter.
4.2 Mounting the Inverter
Dimensions of wall bracket:
Figure 4.3 Inverter wall mounting
Please see Figure 4.4 and Figure 4.5 for instructions on mounting the inverter.
The inverter shall be mounted vertically. The steps to mount the inverter are listed below:
1. According to figure 4.2, select the mounting height of the bracket and mark the mounting holes. For brick
walls, the position of the holes should be suitable for the expansion bolts.
Figure 4.4 Inverter wall mounting

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2. Make sure the bracket is horizontal and the mounting holes (in Figure 4.4 ) are marked correctly. Drill the
holes into the wall or pillar at your marks.
3. Use suitable screws to fix the bracket to the wall.
The inverter must be mounted vertically.
4.Lift the inverter (be careful to avoid body strain) and align the back bracket on the inverter with the convex
section of the mounting bracket.Hang the inverter on the mounting bracket and make sure the inverter issecure
(see Figure 4.5).
Figure 4.5 Wall Mount Bracket
5. Use M5*16 screws in the accessory to lock the inverter to the mount bracket.
4.3 Electrical Connections
4.3.1 Connect PV side of inverter
The electrical connection of the inverter must follow the steps listed below:
1. Switch the Grid Supply Main Switch (AC) OFF.
2. Switch the DC Isolator OFF.
3. Assemble PV input connector to the inverter.
Before connecting the inverter, please make sure the PV array open-circuit voltage is
within the limit of the inverter.
Maximum 600Voc for RI-ENERGYFLOW-MIDI-3.0D /3.6D /4.0D /4.6D /5.0D /6.0D.
Please don't connect PV array positive or negative pole to the ground, it could cause
serious damages to the inverter.

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Before connection, please make sure the polarity of the output voltage of the PV array
matches the "DC+" and "DC-" symbols.
Figure 4.6 DC+ and DC- Connectors
Please use the approved DC cable for the PV system.
Cable type
Cross section
Range
Recommended
value
Industry generic PV cable(model:PV1-F)
4.0-6.0 (12-10AWG)
4.0 (12AWG)
Table 4.1 DC cable
The steps to assemble the DC connectors are listed as follows:
I) Strip off the DC wire for about 7mm, Disassemble the connector cap nut.
Figure 4.7 Disassemble the Connector Cap nut
ii) Insert the wire into the connector cap nut and contact pin
Figure 4.8 Insert the Wire into the Connector Cap nut and contact pin

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iii) Crimp the contact pin to the wire using a proper wire crimper.
Figure 4.9 Crimp the contact pin to the wire
v) Insert the contact pin to the top part of the connector and screw up the cap nut to the top part of the connector.
Figure 4.10 Connector with Cap nut Screwed on
v) Then connect the DC connectors to the inverter. A small click will confirm the connection.
Figure 4.11 Connect the DC Connectors to the Inverter
4.3.2 Connect grid side of the inverter
For all AC connections, 4-10mm² 105 XJ cable is required to be used. Please make sure the resistance of the cable
is lower than 1 ohm. If the wire is longer than 20m, it's recommended to use a 10mm² cable.
There are"L" "N'' '' '' symbols marked inside the connector, the Line wire of grid must be
connected to "L" terminal; the Neutral wire of the grid must be connected to "N" terminal;
the Earth of the grid must be connected to '' ''

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Object
Description
Value
A
External diameter
12mm to 18mm
B
Copper conductor cross-section
4mm² to 10mm²
C
Stripping length of the insulated conductors
approx. 13mm
D
Stripping length of the outer sheath of the AC cable
approx. 53mm
The PE conductor must be 10mm longer than the L and N conductors
b. Insert the conductor into the suitable ferrule acc. to DIN 46228-4 and crimp the contact.
b
c. Unscrew the swivel nut from the threaded sleeve and thread the swivel nut and threaded sleeve over the AC cable.
c
d. Insert the crimped conductors L, N and PE into the corresponding terminals and tighten the screw with a hex key
wrench screwdriver (size:2.5, 1.2-2.0Nm). Ensure that all conductors are securely in place in the screw terminals on
the bush insert.
d
e. Screw the swivel nut onto the threaded sleeve. This seals the AC connector and provides strain relief for the AC
cable. When doing so, hold the bush insert firmly by the locking cap. This ensures that the swivel nut can be screwed
firmly onto the threaded sleeve.
e
f. Assembly the plug shell, adapter as below picture, Push the adapter and Shell by hand until a “Click” is heard or felt.
F
L
N
G

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g. Plug the AC connector into the jack for the AC connection by hand until a “Click” is heard or felt.
Figure 4.17 Connect the AC Connector to the Inverter
Connection for Split phase grid
When connecting to 208/220/240V split phase, please connect L1 to "L" terminal, L2 to
"N" terminal. Also, connect the earth to the ground terminal.
4.3.3 External ground connection
An external ground connection is provided at the right side of inverter.
Prepare OT terminals: M5. Use proper tooling to crimp the lug to the terminal.
Figure 4.18 Connect the external grounding conductor
When an earth fault occurs，the machine cannot be connected to the grid, the LED red
light is on, and the LCD displays the fault code F07 until the fault is resolved.
4.3.4 Max, over current protection device (OCPD)
To protect the inverter's PV and AC grid connection conductors, Rayleigh Instruments recommends installing
breakers that will protect against overcurrent. The following table defines OCPD ratings for the RI-
ENERGYFLOW-MIDI single-phase inverters.

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Inverter
Rated output voltage(V)
Rated output current (A)
Current for protection
device (A)
3.0D
230
14.4
20
3.6D
230
17
25
4.0D
230
19
30
4.6D
230
22
40
5.0D
230
24
40
6.0D
230
26
40
Table 4.3 Rating of grid OCPD
Inverter
Rated input voltage(V)
Max. input current (A)
Current for protection
device (A)
3.0D
380
15
20
3.6D
380
15
20
4.0D
380
15
20
4.6D
380
15
20
5.0D
380
15
20
6.0D
380
15
20
Table 4.4 Rating of PV OCPD
4.3.5 Inverter monitoring connection
The inverter can be monitored via Wi-Fi or GPRS. All RI-ENERGYFLOW-MIDI communication devices are
optional (Figure 4.20). For connection instructions, please refer to the RI-ENERGYFLOW-MIDI Monitoring
Device installation manuals.
Figure 4.19 Communication function

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The inverter is equipped with standard RS485 and WLAN/GPRS communication ports, and the RS485
communication port is mainly used for the software upgrade, WLAN/GPRS communication port is for inverter
wireless monitoring.
Pin
Description
Pin
Description
1
VCC
3
485A
2
GND
4
485B
Table 4.5
Figure 4.20 Inverter RS485/WLAN/GPRS port
4.3.6 CT connections(optional)
This inverter has integrated export limitation functionality. To use this function, a CT must be installed, if use
the CT, please reference the picture below. The CT should be fitted around the live conductor on the grid side
of the main incoming consumer unit. Use the directional flow indication arrow on the CT to ensure it is fitted in
the correct orientation. The arrow should be pointing towards the grid, not the load.
Figure 4.21 Direction of CT
Pin
Description
Pin
Description
1
CT positive electrode
3
NC
2
CT negative pole
4
NC
Table 4.6

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Please follow the figure below to assemble the CT connector
Figure 4.22 CT connector
4.3.7 DRED port connections(optional)
DRED means demand response enable device. The AS/NZS 4777.2:2015 required inverter need to support
demand response mode(DRM). This function is for the inverter that complies with AS/NZS 4777.2:2015
standard. RI-ENERGYFLOW-MIDI single phase inverter fully complies with all DRM. A 6P terminal is used for
DRM connection.
Table 4.7
Please follow below figure to assemble DRM connector.
Figure 4.23 DRM connector
Pin
Description
Pin
Description
1
DRM 1/5
3
DRM 4/8
2
DRM 2/6
4
DRM 4/8
3
DRM 3/7
6
Com/DRMO

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5. Start&Stop
5.1 Start the Inverter
To start up the Inverter, the following steps must be strictly followed:
1. Switch the grid supply main Switch (AC) ON first.
2. Switch the DC switch ON. If the voltage of PV arrays is higher than the start-up voltage, the inverter will turn
on. The LED status indicator will light.
3. When both the DC and the AC sides supply to the inverter, it will be ready to generate power. Initially, the
inverter will check both its internal parameters and the parameters of the AC grid, to ensure that they are within
acceptable limits. At the same time, the green LED will flash and the LCD displays the information of
INITIALIZING.
4. After 20-300 seconds (depending on local requirement), the inverter will start to generate power. The green
LED will be on continually and the LCD displays GENERATING.
Do not touch the surface when the inverter is operating. It may be hot and cause burns.
5.2 Stop the Inverter
To stop the Inverter, the following steps must be strictly followed:
1. Switch the Supply Main Switch (AC) OFF.
2. Wait 30 seconds. Switch the DC Switch OFF. All the LEDs of the inverter will be off in one minute.
6. Operation
During the normal operation, the display alternately shows various status information (see Figure 6.1). Screens
can also be scrolled manually by pressing the UP and DOWN keys.
Figure 6.1 Operation Overview

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Lock screen
Pressing the ENTER key locks (Figure 6.2(a)) or unlocks (Figure 6.2 (b)) the screen.
Figure 6.2 Locks and Unlocks the Screen of LCD
Main Menu
Press the ESC key to access to the Main Menu, there are three submenus in the Main Menu (see Figure 6.3):
Figure 6.3 Main Menu
6.1 Setup-Technicians Only
To access this area is for fully qualified and accredited technicians only. Enter menu
"SETUP" need password.
Select "SETUP" from the Main Menu. The screen will require the password as below.
Figure 6.4 Enter password