Solis EPM1-5G 5G Export Power Manager Instruction Manual

: June 6, 2024
: solis

Solis EPM1-5G 5G Export Power Manager

Introduction

Product Description

Solis Export Power Manager can monitor and control the backflow power from the inverter to the grid thus providing export power control of inverters.
The export power manager is suitable for use with all solar PV grid tie inverters.
Model: S2.1P-PELD10-Mll.1 is for single phase systems.
Model: S2.3P-PELD10-Mll.1 is for three phase systems.

Front View

Front View

Bottom View

Packaging

When you receive the EPM please ensure that all the parts listed below are included:

Packaging

If anything is missing, please contact your local Solis distributor.

Safety Instructions

Safety Symbols

Safety symbols used in this manual, which highlight potential safety risks and important safety information, are listed as follows:

WARNING:
WARN ING symbol indicates important safety instructions, which if not correctly followed, could result in serious injury or death.
NOTE:
NOTE symbol indicates important safety instructions, which if not correctly followed, could result in some damage or the destruction of the inverter.
CAUTION:
CAUTION, RISK OF ELECTRIC SHOCK symbol indicates important safety instructions, which if not correctly followed, could result in electric shock.
CAUTION:
CAUTION, HOT SURFACE symbol indicates safety instructions, which if not correctly followed, could result in burns.

General Safety Instructions

WARNING:
Electrical installations must be done in accordance with the local and national electrical safety standards.
WARNING:
It is forbidden to insert or unplug the CT cable with power on.
If accidentally disconnected the CT cable, please turn off the main AC switch and wait for 5 mins before reconnect the cable.
CAUTION:
Risk of electric shock. Do not remove cover. There is no user serviceable parts inside. Refer servicing to qualified and accredited service technicians.
CAUTION:
Risk of electric shock from energy stored in capacitors.
Do not remove cover until 5 minutes after disconnecting all sources of supply expect service technician. Warranty may be voided if any unauthorized removal of cover.

Notice For Use

The Export Power Manager has been constructed according to the applicable safety and technical guidelines.
Use the Export Device in installations that meet the following specification ONLY:

Permanent installation is required
The electrical installation must all the applicable regulations and standards.
The Export Power Manager must be installed according to the instructions stated in this manual.
The Export Power Manager must be installed according to correct technical specification.
To install the Export Device you should notice the phase of sampling voltage and the direction of sampling current, then you can connect sampling wires and CT (current transformer).

Overview

Front Panel Display

LED Status Indicator Lights

Sr No.

| Light| Status|

Description

---|---|---|---

1

|

POWER

| ON| Export Device power on
OFF|

Export Device power off

2

|

OPERATION

| ON| Communication with inverter
OFF|

No communication with inverter

3

|

ALARM

| ON| Alarm
OFF|

No alarm

Keypad

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).

LCD

The two-line Liquid Crystal Display (LCD) is located on the front panel of the EPM, which shows the following information:

Export Power Manager operation status and data;
Service messages for operator;

Installation

Select a Location for the EPM

To select a location for the EPM, the following criteria should be considered:

The temperature of the EPM could up to 75°C.
The EPM is designed to work in extreme temperature range is from -25°C to 60°C.
The EPM should be kept minimum 300mm clearance from the other device.
The EPM cannot be placed in direct sunlight.

Mounting the EPM

Please attach mounting plate on to wall horizontally where to install the product. Then mark A, B and C to fix mounting plate.

Bracket

Drill three φ8 holes and insert expandable shell into the holes which make the bracket alignment. After that fix the bracket on the wall.

Fix the Bracket on the Wall

Hang the EPM in the bracket by the steps below.

Fix the two screw at the side of bracket.

Fix the Two Screw

Electrical Connections

The Export Power Manager is designed for electrical connection without removing the cover.
The meaning of the symbols located at bottom of the EPM is listed.

Grid	AC voltage sampling terminal
CT1, CT2, CT3	AC current sampling terminals(CT)
Comm_INV	Connect to solis inverters
Communication	Monitoring device or Upgrade Stick

System connection diagram is as follows:

Three Phase System with Solis-EPM3-5G 01

Three phase system with Solis-EPM3-5G

Three Phase System with Solis-EPM3-5G 02

Three phase system with Solis-EPM3-5G

Single Phase System with Solis-EPM1-5G

Single phase system with Solis-EPM1-5G

Make the Grid Input Cable
- Measure the distance from EPM to power distribution box. And find proper cable for grid input. 3 core cable for Solis EPM1 5G and 5 core cable for Solis EPM3 5G.
- For single phase inverter installation connect L, N, PE to pin L, N, ground.
- For three phase inverter installation connect U, V, W to pin 1, 2,3 and connect N to pin4, connect PE to ground.
  Single Phase Connection
  Three Phase Connection
  Strip the Cable (Single)
  $Strip the Cable $Single$$ Strip the Cable (Three)
  $Strip the Cable $Three$$
- Through the cable to the washer and use a suitable screw driver to fix the wire to the connector.
  Welding Wire to Connector (Single)
  $Welding Wire to Connector $Single$$ Welding Wire to Connector (Three)
  $Welding Wire to Connector $Three$$ Assemble Connector (Single)
  Assemble Connector (Three)
  $Assemble Connector $Three$$
Make RS485 Cable (COMM-INV Port)
- The RS485 terminals for inverter and EPM are already assembled. Tips:RS485 cable: preferred 0.5mm2 , max 1.0mm2.
  RS485 Terminal
- Connect communication cable between inverter with EPM, and then measure the distance from EPM to inverter. Use proper cable for RS485 connection. (0.5mm2)
  RS485 Cable Connection
- Follow step 1 to assemble 2 connectors to each end of cable.
Connect and fix the CT
To detect the backflow power, the CTs need to be installed at the PCC (Point of Common Coupling), instead of the load branch circuit.
Note:
For three phase system, CT1 ,CT2 and CT3 must be installed on U,V and W with correct sequence, otherwise EPM can not detect the correct data. “The CT cable outer diameter is 6.5mm-7 .5mm, cross-sectional area 1.5mm2”.
- Switch off the main switch, disconnect the line cables.
- Insert the cables through the CT, make sure the P1 on CT is towards grid and P2 is towards the inverter.
- Reconnect the line cables.
  Note:
  If the CT is installed in the wrong direction, the EPM can’t work normally.

Specification

| Dimensions (mm) WxHxD| Hole Size (mm) Axe| CT Ratio|

AKH-0.66K

---|---|---|---|---
CT-30×20-1OOA|

90x 114×40

| 22 X 32|

100:5A

| AKH-0.66K
CT-60×40-300A|

114 X 140 X 36

| 42 X 62|

300:5A

CT-80×40-600A|

122 X 162 X 40

| 42 X 82|

600:5A

CT-80 x40-1OOOA|

122 X 162 X 40

| 42 X 82|

1000:5A

CT-160×80-2000A|

184 X 254 X 52

| 82 X 162|

2000:5A

CT-160×80-3000A|

184 X 254 X 52

| 82 X 162|

3000:5A

Note:
Solis recommends customers to purchase suitable current transformers from local suppliers according to the max possible current in different projects.
As long as the secondary current is 5A, no matter what the primary current is, it will not affect the warranty of the EPM devices and inverters.
Solis can also provide above current transformers as an optional accessory. Customers can contact Solis sales rep to place the order based on their project requirements.

Multi Inverter Connection
Please follow the previous system diagrams to connect multiple inverters.
EPM can control max 10 inverters (Different models are allowed).
The system can ONLY has one grid connection point.
Monitoring
Inverters that connected to EPM can be monitored by Ginlong WiFi/GRRS stick or box. WiFi/GPRS stick is used for single inverter monitoring.
Multi-inverters must use WiFi/GRRS box to monitor.
Note:
When inverter connected to EPM, no other monitoring device is allowed to be connected to the inverter.

Commission and Decommission

Commissioning

Connect CT connector, grid input terminal, RS485 terminal (INV) and monitoring device (if needed) to the EPM. Connect the other end or RS485 cable to inverter.
Close the breaker of grid input and start up EPM.
The power LED (red) light, after the start up interface, press up or down check if the active power is positive or 0. If the active power is negative please check the direction of CT.
Please set inverter number for multi-inverters connection.
Follow the instruction of inverter to start up inverter. If EPM communicate with inverter successfully, the green LED will light.
The default allowed backflow power is 0. Please follow 6.5 to change the allowed backflow power if needed.

Decommissioning

In order to avoid the backflow power to grid, please stop the inverter before stop the EPM.

Turn off the inverter output AC breaker.
Turn off inverter input DC breaker or pull out PV cable to stop inverter.
Turn off the grid input breaker of EPM.
Disconnect all cable of EPM, disassemble EPM after 5 mins.

Operation

During normal operation, the display alternately shows the power of grid side and the operation Status .Screens can also be scrolled manually by pressing the UP and DOWN keys. Press the ENTER key to access to the Main Menu.

Operation Overview

There are 4 status:

Normal: The system works normally
RS485 All Fail: EPM has lost communication with ALL inverters
CT-Failsafe: Current Sensor failed
RS485Fail: EPM has lost communication with one or some of the inverters

There are four submenus in the Main Menu:

Information
Settings
Advanced Info.
Advanced Settings

Information

Solis Export Power Manager main menu provides access to operational data and information. The information is displayed by selecting “Information” from the menu and then by scrolling up or down.

Display

|

Description

---|---
VacA Grid:           000.0V
lacA :-Grid:           000.0A| Vac_Grid: Grid voltage and current.
VacB Grid:           000.0V
lacs :-Grid:            000.0A
VacC Grid:           000.0V
lacc :-Grid:            000.0A
Load Pwr: 0000.0KW
TotaCPINV: 0000.0KW| Load Pwr: Load Power.
Total_PINV: Total output power of inverters.
Export Limited:   000% Frequency: 00.00Hz| Export Limited: Inverter output power percentage.
Frequency: Grid frequency.
Active APwr: +00000W Active=BPwr: +00000W|

Active_Pwr: Power of the power grid.

Active CPwr: +00000W Active=TPwr: +00000W| ActivePwr: Power of the power grid.
Active TPwr: :Power flows through CTs.
Inverter SN:
xxxxxxxxxxxxxxx| Series number of the inverter.

Lock Screen

Pressing the ESC key returns to the Main Menu. Pressing the ENTER key locks or unlocks the screen.

Locks and Unlock the Screen of LCD Locks and Unlocks the Screen of LCD

Settings

The following submenus are displayed when the Settings menu is selected:

Set Time
Set Address

Set Time
This function allows time and date setting. When this function is selected, the LCD will display a screen.

NEXT= OK=
01-01-2016 16:37

Press the UP/DOWN keys to set time and data. Press the ENTER key to move from one digit to the next (from left to right). Press the ESC key to save the settings and return to the previous menu.

Set Address
This function is used to set the address when multi inverters are connected to three monitor. The address number can be assigned from “01 “to “99”.
The default address number is “01 “.

YES= NO=
Set Address: 01

Press the UP/DOWN keys to set the address. Press the ENTER key to save the settings. Press the ESC key to cancel the change and return to the previous menu.

Advanced Info – Technicians Only

NOTE :
To access to this area is for fully qualified and accredited technicians only.
Enter menu “Advanced Info.” and “Advanced settings” (need password).

Select “Advanced Info.” from the Main Menu.
The screen will require the password as below:

YES= NO=
Password: 0010

After enter the correct password the Main Menu will display a screen and be able to access to the following information.

Inverter Power
CT Connect Status
Version
Model Inverter
Communication Data
Energy Info

The screen can be scrolled manually by pressing the UP/DOWN keys. Pressing the ENTER key gives access to a submenu.
Press the ESC key to return to the Main Menu.

Inverter Power
The screen shows the information of Inverter Power for each inverter which connected to the EPM.

- >lnverter1: 00000W
Inverter2: 00000W

CT Connect Status
The position of three-phase CT installation and direction of current detection refer to 4.3, P1 on CT is towards grid and P2 is towards the inverter, then EPM detection will display OK, as shown in figure 6.7. Otherwise, the status will display “NG” which indicates wrong CT direction.

- >CTA_ connection: OK
CTB_ connection: OK

Version
The screen shows the model version and the software version of the Inverter.

Software Ver.: 11

Model Inverter
The screen shows the Rated power of inverters that are connected to the EPM.

Model: 50000

Communication Data
The screen shows the internal communication data of the Inverter, for service technicians only.

01-05: 00 00 00 00 00
06-10: 00 00 00 00 00

Energy Info
This shows the energy records on the EPM.

Load Total E.
INV Send Total E.
Send Grid Total E.
Get Grid Total E.

Load Total E
INV Send Total E

Advanced Settings – Technicians Only

NOTE:
To access to this area is for fully qualified and accredited technicians only.
Please follow 6.4 to enter password to access this menu.
Select Advanced Settings from the Main Menu to access the following options:

Inverter Qty. Set
Backflow Power
Set CT Ratio
FailSafe ON/OFF
Backflow Work Mode
PELD ON/OFF
Transmit ON/OFF
System Update
Reset Password
Restore settings
Set Capacity

Inverter Qty. Set
This submenu is used for setting inverter number.

YES= NO=
Total Inverter Num: 09

Enter the screen ,it shows all the number of inverters which connected to the EPM.
The number (01-99) can be select by pressing the UP/ DOWN keys.
Press the ENTER key to set the inverter number ESC key to return to the previous menu.

Backflow Power
This submenu is used for setting allowed power that inverter can generate to grid.

YES= NO=
Set Power: +000000W

Press the UP/DOWN keys to set data. Press the ENTER key to set backflow power.
Then press UP/DOWN keys to change the number( the times of 100).
Press the ESC key to save the settings and return to the previous menu.

Set CT Ratio
This is used to set the CT ratio for the current transformer.
Setting range is from 20:1 to 9900:1 with 10:1 interval.
For example, if 1000:SA current transformer is used, please set the ratio as 200:1

YES= NO=
Set Para: 0030:1

Press the UP/DOWN keys to set data. Press the ENTER key to set CT Para.
Press the ESC key to save the settings and return to the previous menu.

FailSafe ON/OFF
The submenu is used for setting fail Safe ON/OFF.
Fail Safe indicates the communication status between EPM and inverters.
The default setting is “Run”. DON’T change it without technicians.

YES= NO=
FailSafe: RUN

When the Fail Safe is set as “Run”. If some of inverters lost communication with EPM, EPM’s LCD screen will display” RS485 fail”; if all inverters lost communication with EPM, then the LCD screen of EPM will display “fail safe”. And The inverter stops output power. When the Fail Safe is set as “Stop”, communication lost between EPM and inverters will not affect the output of inverters.

Backflow Work Mode
This submenu is used for set backflow work mode: 01, 02. “01” is the default mode.

YES= NO=
Mode:01

Mode “01”, the average limiting mode, the output power of each phase is the average of the three-phase load power, and it is more than the phase of the lowest power in three phases.

Operation 01

Mode “02”, the per phase limiting mode, the inverter only generate the power that equals to one of three-phase load power that is the lowest load power of a certain phase.

Operation 02

PELO ON/OFF
This submenu is used for set PELO on/off. PELO decides EPM works or not.

YES= NO=
Switch: OFF

Set PELO is on, EPM can monitor and manage the working condition of inverters in real time, and it prevents backflow generated. Set PELO is off, which means EPM shutdowns the function of controlling backflow power.

Transmit ON/OFF
This is a setting for Solis technician use only.
Please keep the switch as OFF for normal use.

YES= NO=
Switch: OFF

System Update
The upgrade of EPM’s system can realize by external wire.
Please consult our technical engineer for more details.

YES= NO=
Current Ver.: 11

Reset Password

YES= NO=
Password: 0000

Firstly, input the origin password and press Enter button;
Second, input the new password, press Enter button to save it. UP/DOWN button can be used to move the cursor.
Third, Press ESC button to get to the previous page.

Restore Settings
When Restore Settings is selected, the LCD will display.

Are you sure?
YES= NO=

Press the ENTER key to execute the setting.
Press the ESC key to return to the previous menu.

Set Capacity
This item is used to set the sum of the capacities of the connected inverters.

- >Capacity Setting

YES= NO=
Set Capa.: OOOOOOOOW

Inverter Set
EPM has two versions: EPM-2G, EPM-5G. While inverter is working with EPM, please be reminded to change the inverters settings as below:

Advanced info.
- > Advanced Settings
⇓
YES= NO=
Password:0010

- > External EPM Set
⇓ **

5G EPM / Others EPM
**

- > ON/OFF

NOTE:
If you are using EPM-5G, please choose “SG EPM”, and set it “ON”, if you are using EPM-2G. Please choose “Others EPM”, and set it “ON”, only one setting needs to be set.

NOTE:
If “SG EPM” is chosen, for inverters produced before Nov 30th 2019 (SN: XXXXXX19B30XXXX) need to update the firmware, please contact with Solis local service center or service@ginlong.com for instructions on firmware update.

Troubleshooting

The EPM is designed in accordance with the most important international safety and EMC requirements. Before delivering to the customer, the EPM has been subjected to several tests to ensure its optimal operation and reliability.
In case of failure, the LCD screen will display alarm message.
The EPM can show Alarm it self or alarm from inverter. There are 3 alarm can be showed on LCD:

Backflow
There are backflow current to grid, customer need to stop inverter. and check the connections for the RS485 cable between EPM and inverter.
fault
There are fault alarm in inverter, need to check inverter status.
Fail safe
RS485 AllFail: EPM has lost communication with ALL inverters
CT-Failsafe: Current Sensor failed
RS485Fail: EPM has lost communication with one or some of the inverters