Victron energy ET340 User manual

Energy Meter Manual
ET340
rev 00 06/2022
ENGLISH

Table of Contents
1. Introduction ........................................................................................................................... 1
1.1. Features ...................................................................................................................... 1
2. Selection Guide ....................................................................................................................... 2
3. Installation and configuration ..................................................................................................... 4
3.1. AC wiring ..................................................................................................................... 4
3.1.1. Configuration options ............................................................................................. 4
3.1.2. System examples ................................................................................................. 4
3.2. Connection to a GX device ................................................................................................. 5
3.2.1. Wired connection to a GX device ................................................................................ 5
3.2.2. Zigbee connection to a GX device .............................................................................. 6
3.3. GX device configuration .................................................................................................... 7
3.4. Multiple Energy Meters in one system .................................................................................... 9
4. Information on multiple Zigbee pairs ........................................................................................... 10
4.1. Multiple Zigbee pairs ...................................................................................................... 10
5. FAQ ................................................................................................................................... 11
Energy Meter Manual

1. Introduction
The Victron ET340 is a standard device to measure the power and energy of a 3-phase application, for example at the distribution
box or to measure the output of a PV Inverter, AC Genset or the output of an inverter and inverter/charger.
Its data will be displayed on a GX device and our VRM portal.
1.1. Features
The energy meter can be configured for four different roles in a GX device (e.g. Cerbo GX):
• As a Grid meter and used as control input for an ESS System.
• To measure the output of a PV Inverter.
• To measure the output of a AC Genset.
• As a AC meter to measure the output of an inverter or inverter/charger.
The ET340 offers two options for connection to a GX device:
• A wired connection, either by using the RS485 to USB interface with 1.8m or 5m cable length.
• A wireless connection via our Zigbee to USB and Zigbee to RS485 converter.
Energy Meter Manual
Page 1 Introduction

2. Selection Guide
At Victron Energy, we stock several types of Energy Meters.
The Energy Meters are used in systems with a GX device to measure the output of a PV inverter, AC Genset, Inverter output or
as a Grid Meter in an ESS installation (more information in the ESS manual).
Energy Meter ET112 ET340 EM24 RS485 EM24 Ethernet
Appearance
Display No LCD
Part Number REL300100000 REL300300000 REL200100000 REL200200100
Supported Phases 1-phase 3-phase
Maximum Current Rating 100A 65A per phase
Measurement Type Shunt
Data Connection RS485 Ethernet
First decide if you need single- or three-phase meters
For a 3-phase utility connection, use a 3-phase meter. For a 3-phase PV Inverter, use a 3-phase meter as well. For a single-
phase utility connection, use a single-phase meter. And in an installation with a single-phase utility connection, that also has a PV
Inverter that needs measuring with a Victron meter, then you can use two ET112, one for the grid and one for the PV Inverter; or
use the ET340.
Now, based on current, select the model:
Requirement Measurement Type Model / Solution
Single-phase up to 100A Shunt ET112
Three-phase up to 65A/phase Shunt ET340 / EM24
Single-phase more than 100A/phase CT Not available, use the three-phase CT solution
Three-phase more than 65A/phase CTs Carlo Gavazzi EM24DINAV53DISX (see FAQ Q7 [11])
The EM24 meter counts energy in a different way than the ET340. For Germany and most other countries; the EM24 is the
advised model. See FAQ Q4 and Q8 [11] for further details regarding energy counting differences.
In case of EM24, select between RS485 and Ethernet connection:
The Ethernet model will have an advantage in installations where an Ethernet network is available. Rather than having to pull an
RS485 wire between the main AC distribution board and the storage system, the existing Ethernet can be used.
The disadvantage is that this relies on that network functioning properly - in case of issues the storage system will switch to idle
mode: passthrough.
Energy Meter Manual
Page 2 Selection Guide

Support for other Carlo Gavazzi meters
Besides above listed meters, there are many more meters available from Carlo Gavazzi. Use this list below to see which ones are
compatible.
Type GX firmware
supported
Remarks
EM111 Yes Compatible with ET112
ET111 Yes Compatible with ET112
EM112 Yes Compatible with ET112
EM340 No Does not report exported energy per phase (unlike the ET340)
EM21 72D No Does not report exported energy / com protocol not compatible with supported
grid meters
EM271 No Does not report exported energy / com protocol not compatible with supported
grid meters
EM530* Yes Only X and PFC models
EM540* Yes Only X and PFC models
* requires GX firmware 2.90 and higher
Energy Meter Manual
Page 3 Selection Guide

3. Installation and configuration
3.1. AC wiring
3.1.1. Configuration options
The configuration option of either Grid Meter, PV Inverter, Generator or AC Meter is set in the GX device. That selection will effect
how the system should be wired, and how the information received from the meter is displayed on the screen.
See below diagrams for the different wiring options:
L1
L2
L3
N
PE
L1
L2
L3
N
PE
ET340
3-phase wiring
When used to measure a PV Inverter, terminals 1, 2 and 3 should face the PV inverter to ensure correct
direction of current and power.
On the GX device go to the grid meter in the Wired AC sensor settings. Make sure 'Phase type' is set to 'Single phase' and 'PV
inverter on phase 2' is enabled.
3.1.2. System examples
Example diagram
In this diagram, a single ET340 is used to both measure the grid and a single phase PV Inverter.
Energy Meter Manual
Page 4 Installation and configuration

L1
L2
L3
N
PE
ET340
PV Inverter
Inverter/Charger
mcb
Fuse
Single ET340 measures the Grid and a single phase PV Inverter
On the GX device go to the grid meter in the Wired AC sensor settings. Make sure 'Phase type' is set to 'Single phase' and 'PV
inverter on phase 2' is enabled.
3.2. Connection to a GX device
3.2.1. Wired connection to a GX device
Connect the Energy Meter to the GX device using the RS485 to USB interface.
The RS485 to USB interface cable between the GX device and the Energy Meter can be extended up to 100 meters; make sure
that the extensions of the Data+ (orange) and Data- (yellow) wires form a twisted pair.
The table below shows the colors of the wires and their connection to the terminals of the ET340, as well as the colors to be used
for a CAT5 extension cable.
RS485 to USB RS485 Signal ET340 terminal number Suggested wire color CAT5 extension cable
Orange Data + 8 Orange
Yellow Data - 9 Orange/White
Black GND 10 Brown
The red, green and brown wire coming out of the RS485 to USB cable are not used.
Energy Meter Manual
Page 5 Installation and configuration

RS485 to USB
interface
ET340
ET340 wired connection to a Cerbo GX using the RS485 to USB interface
You can attach an RJ45 plug that can be plugged into the front of one of the two RJ45 sockets of the energy
meter and has the same pin assignment.
To ensure signal integrity and robust operation, particularly ensure that:
• The extension cabling complies with the minimum cross-sectional area specifications in the RS485 to USB interface data sheet.
• The extension cabling has appropriate shielding and twisted pair cores.
• The original cable attached to the Victron RS485 USB interface is reduced to a maximum length of 20cm for installations where
the total cable length exceeds 10m or where installation/site specific interference occurs - in this case, a suitable/quality cable
should be used for the entire cable length and not only for the extension length.
• Cabling is installed separated/away from the main DC or AC power cabling.
• All wiring is properly terminated (including unused wires) and properly isolated from weather/water ingress.
• RS485 networks are traditionally terminated at both ends with 120Ω terminators. This is not required if the cable length is short
and you are using the Victron supplied RS485 to USB lengths, but may be required if the cable length is modified.
• For detailed wiring/installation notes and specifications refer to the Victron RS485 to USB interface cable ‘Datasheet’.
3.2.2. Zigbee connection to a GX device
The ET340 can also be wirelessly connected to a GX device via our Zigbee to USB converter & Zigbee to RS485.
The Zigbee to USB converter is connected to the GX device and the Zigbee to RS485 converter is connected to the ET340.
Step 1.
Connect the Zigbee to USB converter to the GX device using the supplied USB cable. A few seconds after connecting, the active
LED should be on and the TX/RX LED should be blinking (the converter takes its power from the GX device, so the GX device
needs to be switched on as well).
Energy Meter Manual
Page 6 Installation and configuration

Step 2.
Connect the Zigbee to RS485 converter to the ET340 energy meter according to the table below:
Zigbee to RS485 ET340 terminal number Color
GND 10 Black
A 8 Orange
B 9 Yellow
In case you have several Zigbee devices installed, make sure only one Zigbee device is powered up right now: the Zigbee to
USB converter connected to the GX device. Power down all others. If you don't do this, the Zigbee to RS485 converter may be
connected permanently to another Zigbee device.
Step 3.
Connect the 12V DC power supply to the Zigbee to RS485 converter. When the power is switched on, check the LEDs again.
ET340
+12V DC
-GND
Zigbee to
RS485
Zigbee to
USB
Energy Meter wireless Zigbee connection to a Cerbo GX
Note on old and new Zigbee converters
Please note that there is a new Zigbee converter available now, that is not backwards compatible with the old converters. See
table below for old versus new part numbers. If you have a non compatible set, please ask your supplier for a correct version.
old/new Victron part number Zigbee to RS485 converter part number
old ASS300400100 DRF2619C
old ASS300400100 DRF2618A
new ASS300420100 DRF2659C
new ASS300420200 DRF2658C
Note on GX firmware versions
For the new type Zigbee converters, Venus OS v2.54 is the minimum required software version.
3.3. GX device configuration
After proper connection and powering up, the meter(s) will be visible on the GX device in the Settings → Energy meters menu:
Energy Meter Manual
Page 7 Installation and configuration

Single Energy Meter in the Energy meters menu Two Energy Meters in the Energy meters menu
After selecting an Energy Meter, you have to set the Role and Phase type. Press the space bar or right click to get to the Phase
type and Role menu:
For the ET112 only Single phase option is displayed Depending on the application, the role is set here
Select either Role or Phase type and press the space bar to make changes:
Select the Role according to the application Selection menu for Single and Multi phase type
After all settings have been made, the Energy Meter now appears with the relevant data in the device list of the GX device:
Energy meter set to measure AC loads on the AC output of
the inverter/charger
Or configured to measure energy consumption from the grid
Energy Meter Manual
Page 8 Installation and configuration

Right-click or press the spacebar to get to the Energy Meter overview with all relevant data on energy consumption and its
generation in all phases. At the bottom of the menu, the role of the Energy Meter can be set via the Setup menu. The data used
for communication can be read out via the Device menu. You can also set up a custom name for the Energy Meter there:
Detailed overview page of a 3-phase Grid meter Always be informed about all details, to the second
Custom name configuration Quickly change roles
3.4. Multiple Energy Meters in one system
To connect multiple Energy Meters, wire each meter to a separate RS485 to USB interface, which are then each plugged into a
separate USB socket on the GX device.
Connecting multiple meters to the same RS485 to USB interface cable is not possible.
Connecting multiple ET340 meters to the same RS485 to USB cable is not possible: the ET340 meter has no display and its
modbus address can therefore not be changed.
Energy Meter Manual
Page 9 Installation and configuration

4. Information on multiple Zigbee pairs
4.1. Multiple Zigbee pairs
Running multiple Zigbee pairs is rather unusual and not recommended due to its complexity in configuration via the Chinese
language configuration software. However, for those who still want to try, we show a possible solution.
The following is only valid for the new Zigbee converters with part number DRF2658 and DRF2659. For older units there is no
software support anymore.
To run multiple pairs, the PAN-Id needs to be different, otherwise they interfere with one another. Basic information about where to
obtain the software and how to reconfigure this:
1. Go to http://www.dtkcn.com/
2. Use the translation feature of your browser if you don't read Chinese, then download the "DTK wireless module configuration
software".
3. The installation is in Chinese, but can be installed by clicking the equivalent "Next" button repeatedly. The software itself has
an English translation.
4. You need to wire an RS485 to USB interface to the RS485 Zigbee module if you need to reconfigure it. The alternative is to
reconfigure the USB unit (the coordinator) BEFORE you turn on the RS485 side (the router). The router will always join the
coordinator and get its initial settings at startup.
5. Each pair must have a different PAN-Id.
It is unusual to have multiple Zigbee links. Using an Energy meter via Ethernet (possibly with a Wi-Fi link) is
the more reliable option in any case.
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Page 10 Information on multiple Zigbee pairs

5. FAQ
Q1: Can I combine three ET112s for a 3-phase system?
No. Use a real 3-phase meter.
Q2: Can I use other meters, for example from other brands?
No.
Q3: I already have a Fronius SmartGrid meter, can I use that?
No.
Q4: What are the differences between the various 3-phase meters?
• EM24 - REL200100000 - Carlo Gavazzi EM24DINAV93XISX
• ET112 - REL300100000 - Carlo Gavazzi ET112-DIN.AV01.X.S1.X
• ET340 - REL300300000 - Carlo Gavazzi ET340-DIN.AV23.X.S1.X
Differences:
• The ET meters don't have a front selector that the installer needs to put in a different setting than it comes out of the box:
easier, less mistakes to be made.
• The ET meters have no display. The only thing they have is an LED, which blinks in case of active communication.
• The new meters have two RJ45 sockets for the Modbus RS485 connection. But they are not used. Note the possible confusion
because of yet another RJ45 socket in the Victron world though. Don't mix that with VE.Bus, VE.Can or VE.net. Besides the
RJ45 sockets, the meters still also have screw terminals access below the sockets for the RS485 wiring, which is how we
advise to connect a meter to the RS485 to USB interface and then a GX device.
• Since there is no display, the modbus address can no longer be changed on the meter. Combining multiple of those meters on
one RS485 network is therefore not supported by Victron. You are advised to use multiple RS485 to USB interfaces.
3-phase new meter only (ET340):
• Measuring energy from single-phase PV Inverter on the second phase of the new meter, ET340, actually works. Whereas with
the old meter, the EM24, only the Power Metering (Watts) works. The Energy Metering (kWh) for a single phase PV Inverter on
the second phase of the EM24 does not work. See Q9 for the details.
Q5: Will you keep shipping both 3-phase meters? (ET340 & EM24)
Yes. There are still situations suitable for each. See Q8.
Q6: Can I buy those meters directly from Carlo Gavazzi instead of from you?
Yes. That is also why we make no secret of the CG part numbers.
Q7: I want to use Current Transformers (CTs), is that possible?
Yes. You can buy the CG EM24DINAV53DISX directly from Carlo Gavazzi or one of their distributors. Even though Victron does
not stock that type of meter, we do support it in our software.
Q8: What’s the difference between ET340 and EM24 in 3-phase systems?
These meters have a different way of calculating the total of energy imported and exported.
In the ET340, the energy imported and exported is counted at each individual phase and then the Total is provided from the sum
of those values.
In the EM24, the energy imported and exported is counted as a total power, with net differential readings from each phase
cancelling each other out.
Which Energy Meter is most suitable depends on the measuring configuration in your country. It is most common in Australia and
Germany for example to only be billed for the total in a 3-phase system. So it is more accurate to use an EM24 to match the
billing.
So if you are exporting from one phase and importing from another phase after the energy meter, but before the billing meter,
then you will not be charged for this, and the meter should not count it as an import and an export.
This is also how Victron’s phase compensation feature works, to make the most of the cost savings for an ESS system when
there is a differential in generation and load across different phases.
Energy Meter Manual
Page 11 FAQ

Q9: Can I use an isolated USB-RS485 interface?
Yes. The interfaces we sell are non isolated; suitable for most use cases.
In case an isolated one is needed; purchase it directly from Hjelmslund Electronics.
• USB485-STIXL : Isolated USB to RS485 converter
Q10: Can I use Victron Energy Meters instead of a Victron Inverter/Charger to make use of a GX device (e.g. Cerbo GX),
VRM and other features?
Energy Meters are intended to supplement a Victron Inverter/Charger in the system. Energy Meters are currently limited in their
potential applications. Each Energy Meter is only intended to provide a specific piece of additional information - total loads on AC
input and grid import/export, or AC PV inverter and AC generator production without network communications.
However, it is perfectly possible to initially use just a GX device together with an Energy Meter to determine and record the
consumption, for example of houses/buildings, heating systems with heat pumps, ventilating and air conditioning or production
facilities. Afterwards, the collected data can be evaluated and a decision can be made about the dimensioning of the required
Victron inverter/charger(s), the solar system and the type, size and number of batteries.
With GX device firmware version 2.80 and later, they can also be used for other purposes e.g. to measure specific, arbitrary AC
loads or circuits for example. But this should not be considered a replacement to having a Victron Inverter/Charger. Attempting to
use other brand battery inverters and trying to substitute their lack of data connectivity to the GX device by using Energy Meters
will not work as expected.
Energy Meter Manual
Page 12 FAQ