Elecod Monet-AC - grid-support inverter

Description

Device class: three-phase battery power conversion system, with no PV input
Power flow: between a battery and the grid, in the two directions
Brand: Elecod
Name in My Devices: Elecod Monet-AC Series
Monet-100AC: 100 kW
Monet-125AC: 125 kW
Monet-130AC: 130 kW
Model name on the device page: calculated from the Rated Power setting, not read from the converter
Serial number: typed in when you add the converter

LoggerV Connection

Interface	Protocol	Port or baud rate
Ethernet	Modbus TCP	502 by default
RS485	Modbus RTU	LoggerV port Bus Speed

Not used on installed sites: RS485
Converter network settings: not changed by myPower24. Set them before you add the converter.
Factory network settings: IP address 192.168.1.50, TCP port 502 and gateway 192.168.1.1.

Plant Control Functions

Battery converter: the active power setpoint, written in each control cycle, with no deadband
Setpoint read-back: the value that the converter holds, reported to plant control
LoggerV shutdown: a setpoint of zero, written before the LoggerV stops
Not commanded: reactive power, power factor, the on-grid and off-grid switch, power on and off
Reported to plant control: active, reactive and apparent power, the charge and discharge energy totals, the operating mode

Set Grid-connected Control Mode to PQ. In MPPT, CV or VSG the converter ignores the setpoint, and the plant control dispatch has no effect.

Recorded Data

Field	Unit
Phase A Voltage	V
Phase B Voltage	V
Phase C Voltage	V
Phase A Current	A
Phase B Current	A
Phase C Current	A
Phase A Frequency	Hz
Phase B Frequency	Hz
Phase C Frequency	Hz
Total Active Power	W
Total Reactive Power	var
Total Apparent Power	VA
DC Voltage	V
DC Current	A
Busbar Voltage	V
Positive-to-Ground Impedance	Ohm
Negative-to-Ground Impedance	Ohm
Leakage Current	A
Power Tube Temperature	°C
Balance Bridge Temperature	°C
Ambient Temperature	°C

Total Active Power on the device page: Active Power, on the Power Summary card. The same for reactive and apparent power.
Impedance fields on the device page: Positive-to-Ground and Negative-to-Ground
Temperature fields on the device page: Power Tube, Balance Bridge and Ambient
DC Voltage and DC Current: measured at the battery port
Impedance fields: the insulation resistance from each DC rail to ground
Live only: state of charge, the energy totals, power factor, efficiency, per-phase power, inverter output
Sample period: one period for the full device

Reference Documents

These open in the myPower24 library. Sign in to read them.

Elecod eleHost instruction manual V0.0.3

Wiring

The Add-Device wizard makes the connection diagrams; see How to add a device in myPower24.

LoggerV interface: Ethernet
Communication port of the converter: the PCS communication secondary port (J1), at the front of the module.
LAN: RJ45 Ethernet, for the myPower24 link.
COM2: BMS CAN, with CANH_BAT on pin 1 and CANL_BAT on pin 2.
COM1-A and COM1-B: EMS RS485 and CAN in parallel, for a chain of modules, with 12 V up to 1 A on pins 4 and 5.
COM3: two passive dry-contact inputs and one output, rated 24 VDC and 800 mA.
DC terminals: J3, with the orange DC+ and then the black DC-, from left to right.
AC terminals: J4, with N, A, B and C from left to right. A three-wire connection uses A, B and C, and a four-wire connection uses all four.

Setup

Connect the cable as the generated diagram shows.
Set the network settings of the converter before the scan.
Add the device on the LoggerV; see How to add a device in myPower24.
Type the IP address of the converter in IP Address:.
Type the TCP port in TCP Port:.
Type the Modbus address in Modbus Slave ID:.
Type the serial number from the unit label in Serial Number:.
Click Try to connect.
Open Info. Compare Rated Power on the Nameplate card with the nameplate of the converter.
If the two values are different, set Settings > Nameplate & Grid > Rated Power to the nameplate value.
Set Settings > Control Mode > Grid-connected Control Mode to PQ.
Set up the battery; see Battery Communication.
Open Actual Data. Make sure that the phase values change, Control Mode shows PQ and DC Voltage shows a value.

If Authorized Capacity on the Nameplate card is less than Rated Power, the firmware licence is the real power limit.

Set Rated Power to the nameplate value exactly. The LoggerV sends each setpoint as a percentage of this setting, and the converter applies the percentage to its own rating. On a 125 kW unit with Rated Power at 50 kW, a 50 kW request gives 125 kW.

Battery Communication

Link: CAN, from the battery BMS to the converter directly. myPower24 reads the status of the link from the converter only.
CAN lead: pin 1 CANH and pin 2 CANL on COM2, which are white-orange and orange on a T568B lead. Use a crossover lead to the battery.

Converter, Settings > Communication & Dry Contacts:

BMS Enable: Enable
BMS Communication Fault Shutdown: Enable. Without the BMS link, the converter charges with no BMS limits.

Converter, Settings > Battery:

Battery Type: Lithium, for a lithium battery with a BMS. PV and DC bus make the DC port a voltage source and turn off battery protection.
Protection and recovery voltages: the limits of the battery manufacturer for the installed pack
Charge and discharge current limits: the limits of the battery manufacturer
Float and equalisation voltages: the limits of the battery manufacturer
With BMS Enable on: the converter also applies the BMS limits. The lower limit applies.

Do not set a protection point wider than the pack limits. Use the limits of the installed battery, not the values of a different site.

Do not use state of charge to examine the BMS link. The converter does not always show it correctly. With BMS Communication Fault Shutdown on, the converter shows an alarm when the link is down.

Battery Sizing

DC operating range: 580 V to 1000 V on 3W+PE, and 680 V to 1000 V on 3W+N+PE.
DC range at full power: 625 V to 950 V on 3W+PE, and 680 V to 950 V on 3W+N+PE.
Maximum DC current: 160 A on the Monet-100AC, 200 A on the Monet-125AC and 208 A on the Monet-130AC.
Battery modules, 3W+PE: 13 to 17, or 14 to 16 for full power.
Battery modules, 3W+N+PE: 15 to 17, or 15 to 16 for full power.
Off-grid, or 100 % unbalanced power control: needs a DC input above 750 V, which is 17 modules.

Device Page

Actual Data (opens first): Converter State, AC Grid, Power Summary, DC / Battery, Energy
Info: Modbus connection details, General Info, Nameplate
Nameplate card: Rated Power, Authorized Capacity, Rated Phase Voltage, Rated Frequency, Battery Type, Module Address, Cabinet Address
Advanced Data: Temperature, DC Bus & Insulation, Per-phase Power, Inverter Output
Settings: Control, Battery, Nameplate & Grid, Control Mode, Grid Protection Thresholds, Grid Protection Times, Ride-through, Communication & Dry Contacts
Converter commands: Power On/Off and Standby / Shutdown, at the top of the Control group
Healthy link: the phase values on AC Grid change, Control Mode shows PQ, DC Voltage shows a value, and no communication alarm shows
Firmware and hardware versions: read one time, when you add the converter
Converter clock: not shown. The converter does not reply to a read of its clock.

Use Power ON to start a converter after Shutdown. Standby and Shutdown are two different commands, not a toggle.

Troubleshooting

LoggerV Messages

"Failed to scan ID (device did not respond to all register groups)": the converter did not reply to all register groups, so the LoggerV did not add it. Examine the IP address, the TCP port and the Modbus address. The same message shows when a different device replies at that address.
"Serial Number required. Please provide serial number": the Serial Number field is empty. Type the serial number from the unit label.
"Serial number is required to add an Elecod Monet-AC (the converter publishes no serial register).": the LoggerV received no serial number. Type the serial number from the unit label.
"Rated Power is set outside of documented range, every plant-control dispatch will be mis-scaled until this matches the nameplate": Rated Power is below 100 kW or above 130 kW. Set it to the nameplate value before you use plant control.
"Permission denied! Required permission [advanced].": the setting is a grid protection or ride-through setting. See Permissions.

Converter Alarms

"EMS communication failure": the converter lost the monitoring link. Examine the network path. Make sure that the LoggerV reads the converter.
"BMS communication failure" or "BMS fault": examine the CAN lead pinout first. Then examine BMS Enable and the setting on the battery.
"Internal communication failure": a link in the converter failed. Contact Elecod.
"Dry contact 1 fault" or "Dry contact 2 fault": the contact is not in its rest position. Compare the wiring with Dry Contact Default State.
"Grid wrong phase": the AC phase sequence is incorrect. Examine the AC terminal order.
"Grid over-voltage", "Grid under-voltage", "Grid over-frequency" or "Grid under-frequency": the grid is outside the protection limits. The voltage limits are percentages of Rated Voltage. The frequency limits are offsets from Rated Frequency. Examine these two settings first.
"Islanding protection": the converter found a loss of grid and disconnected.
"DC voltage reverse": the DC polarity is reversed.
"Low DC voltage" or "High DC voltage": the battery voltage is outside the DC range of the converter.
"Battery over-charge" or "Battery over-discharge": the pack is outside the protection window. Compare the window with the battery limits before you change it.
"Insulation impedance fault" or "Leakage current fault": an earth insulation problem on the DC side. The recorded impedance and leakage current show if the problem started slowly or suddenly.
"Temperature derating": the converter decreases its output because of temperature.
"High ambient temperature", "Bridge over-temperature" or "Power tube over-temp": examine the cabinet airflow. The warning at 45 °C and the alarm at 55 °C on Ambient Temperature are myPower24 limits, not converter ratings.
"Fan fault 1" or "Fan fault 2": a cooling fan failed. Replace the fan.
"A output overload alarm", "B output overload alarm", "C output overload alarm" or "A-phase output overload": the converter is above its overload limit on that phase.

For a different alarm, record the message and the device serial number, and contact SolarMD support.

Permissions

See the device page and the recorded data: any access level
Change settings, and send Power On/Off and Standby / Shutdown: Editor, Installer or Full control
Grid Protection Thresholds, Grid Protection Times, Ride-through, LVRT Enable, HVRT Enable: also the advanced device capability, from the Access tab of the plant or a SolarMD qualification
With Viewer only: the device page shows View-only on this site.
About the levels: see Access levels field definitions

Rated Power needs no advanced capability.

Tips and Gotchas

No communication watchdog: the converter keeps the last setpoint when the LoggerV stops. An orderly LoggerV restart writes zero first. A power failure of the LoggerV, a disconnected network cable or a software crash does not. Include this in the safety design of the plant.
Monet-100AC on a 125 kW unit: Rated Power is incorrect, because the model name comes from it.
Communication Failure Time: not written or used by the LoggerV