MYPV AC ELWA-E User manual

AC ELWA®-E Operation Manual, Version 00200.01 1
AC ELWA®-E
Electrical Photovoltaic-Excess Hot-Water-Device
Operation Manual
Content
1. Assembly ...........................................................................................................................................2
2. Controls and displays.......................................................................................................................2
3. Operation displays ...........................................................................................................................2
4. Putting into operation......................................................................................................................3
Configuration with router (recommended) ...................................................................................3
Configuration without router ..........................................................................................................4
Procedure ......................................................................................................................................4
5. Web-Interface....................................................................................................................................6
Home (homepage)............................................................................................................................7
Status .................................................................................................................................................7
Data logger........................................................................................................................................8
Setup..................................................................................................................................................8
Boost Settings................................................................................................................................8
Legionella Protection....................................................................................................................9
Time..............................................................................................................................................10
Control Settings...........................................................................................................................10
Measurement Settings ...............................................................................................................13
EV Function..................................................................................................................................14
Multi Units ...................................................................................................................................14
IP Settings ....................................................................................................................................16
Basic Settings...............................................................................................................................16
Cloud Mode .................................................................................................................................17
Debug-Mode................................................................................................................................18
Firmware Version........................................................................................................................18
6. Knob adjustments ..........................................................................................................................19

AC ELWA®-E Operation Manual, Version 00200.01 2
Adjust fuse type of the circuit (13A/ 16A).....................................................................................19
Adjust device number....................................................................................................................19
7. Protocol description of http and Modbus TCP ............................................................................20
8. Firmware Update Ethernet............................................................................................................20
Update from Server (from SNr 160124180131XXXX)..................................................................20
Update with USB cable (for SNr below 160124180131XXXX).....................................................20
9. Fault indication ...............................................................................................................................20
1. Assembly
Before placing into operation it is essential to read the assembly instructions provided with the
device.
2. Controls and displays
3. Operation displays
Start-up
Standby
Heating with
excess power
Heating for hot
water securing
(Boost-mode)
Heating finished,
set-point
temperature
reached
Setup mode
No control signal
Error
Explanation
LED on
LED blinking
LED off
Temperature-adjusting knob
1-6 … Number of device
13A / 16A …fuse protection
LED operating mode displays
green
yellow
red

AC ELWA®-E Operation Manual, Version 00200.01 3
The display can change between „No control signal“ and „Standby“, if the device is
triggered via Web-Interface or in cycles of one minute when data of temperature and power are
recorded.
4. Putting into operation
During the first commissioning the AC ELWA-E is in the so-called "Auto Detect" mode. The
device automatically searches for a signal source and adjusts itself accordingly. If the
search is successful, NO further configuration via the Web-Interface of the AC ELWA-E is
required for the use of excess power!
Configuration with router (recommended)
The start-up with router only works, if it is configured to DHCP.
The device must not be in Setup-Mode ( symbol on adjusting knob)
1. Connect laptop with router (LAN or WLAN)
2. Connect AC ELWA-E and router via standard Rj45-cable („patch-cable“)
3. Plug in AC ELWA-E power plug
4. AC ELWA-E gets a dynamic IP-address from router.
Using the program „my-PV Scanner 1.XX.exe“
(contained in „Software Package AC ELWA-E.zip“ at www.my-pv.com)
the AC ELWA-E can be found.
To do this, unpack the scanner program into a local directory.
5. Are there more AC ELWA-Es in the network, the desired device can be determined by the
serial number (lateral on the case)!
6. A double click on the particular device opens the Web-Interface of the AC ELWA-E.
From firmware version 00200.00 onwards, the required HTML file is downloaded from the
Internet and stored in the same directory as the scanner program.
Scanning is performed via UDP port 16124. Firewalls (or specific router settings) may
prevent the AC ELWA-E from being found.
In this case, it is advisable to look for the IP address of the AC ELWA-E in the DHCP list of the
router and enter it manually into the address line of the web browser.
Alternatively, the second scan program "Scan AC ELWA-E ARP.exe" can be used, which sends an
ARP query to the router and displays the connected my-PV devices. Since the router takes some
time to update the ARP table it may be that the ARP scan takes some time to show AC ELWA-E
results.

AC ELWA®-E Operation Manual, Version 00200.01 4
TIP: Alternatively, the IP address of the device can also be determined via the
DHCP client list of the router or via various IP scan programs!
From firmware version 00200.00 onwards, the Web-Interface of AC ELWA-E is outsourced to an
external HTML file. If the device is accessed directly via the IP address in the web browser, this
view appears.
Follow the download link and save the file locally, then open the file to access the Web-
Interface.
my-PV does not recommend to connect the AC ELWA-E to the Internet via port forwarding
access!
Configuration without router
From Ethernet firmware version 00200.00 this applies:
To be able to access the Web-Interface of AC ELWA-E in systems without internet access, please
download the required HTML file in advance.
You will also find a corresponding note on the carton box:
Procedure
1. Set adjusting knob to the symbol (all three LEDs blinking)
2. Plug in AC ELWA-E power plug

AC ELWA®-E Operation Manual, Version 00200.01 5
3. All 3 LEDs of the AC ELWA-E are on for approx. 10 seconds (device boots), afterwards all 3
LEDs are blinking. The device is now in Setup-Mode
4. Disconnect existing Wi-Fi connections on the laptop to avoid possible network-conflicts
5. Connect Laptop to AC ELWA-E via standard Rj45-cable („patch-cable“).
Depending on the laptop, a cross-over network cable may be required!
6. The Laptop gets a dynamic IP address
7. The system software, e.g. MS Windows 7, might request you to choose a place of the
network. At this step it is not necessary to do so. You can close the window.
8. Insert address 192.168.0.1 in the web browser to select homepage of the AC-ELWA-E
9. Start the previously downloaded HTML file to get to the Web-Interface
10. Select Button „Settings“ and configure as described in chapter „Setup“
11. After all the settings have been made, disconnect the AC ELWA-E power plug
12. Turn the knob to the desired temperature
13. Disconnect the data connection between AC ELWA-E and Laptop/PC
14. Connect AC ELWA-E via standard Rj45-cable („patch-cable“) with router or via cross-over
network cable directly with the my-PV Power Meter!
Do not connect the device directly to the inverter or the battery system!
15. Plug in the AC ELWA-E power plug again
If the signal source for the AC ELWA-E is searched with the „Auto Detect“ –function, the
process can take a few minutes!
If the set-up is done without a router, a connection between PC/Laptop –Router –AC ELWA-E
can though be implemented afterwards. See next chapter!

AC ELWA®-E Operation Manual, Version 00200.01 6
5. Web-Interface
By means of the HTML file (required for Ethernet firmware version 00200.00 or higher) data of
the AC ELWA-E can be retrieved and adjustments can be made.
If the Web-Interface is started via the scanner program, the connection to the device is
established automatically.
If the Web-Interface is started by calling the HTML file, the IP address range of the network in
which the device is located must be set once. The entry is saved by the web browser, but the
address range can be redefined at any time using the "IP Search Range" button.
From the homepage further pages can be selected via the menu buttons.
A quick selection in the upper right corner allows direct access to the Web-Interface from other
my-PV devices in the network. The button "Search Devices" scans the network for my-PV
devices.
TIP: If the device search does not produce a result, the IP address can also be
entered manually in the address line of the web browser.
URL: … /AC ELWA-E 00XXX.XX.XX.html?ip= XXX . XXX . XXX . XXX
Consider that the appearance and the scope of options can change with updated software
versions.

AC ELWA®-E Operation Manual, Version 00200.01 7
Home (homepage)
The graphic shows the current temperature in the boiler, the bar on the left visualises the
power output of the device.
With device state "Off" the control of the AC ELWA-E can be switched off. The status page
displays "Status 21, Device disabled".
With the button „Single Boost“the hot water backup can be started immediately once.
The dynamic web pages „Home“ and „Status“ are displayed without animation by
Microsoft Internet Explorer. Recommended browsers are Google Chrome or Mozilla Firefox in
the latest versions!
Status
State Number, operating condition
AC ELWA-E power output / W
Boost current power for hot water boost / W
Watertemperature current water temperature / °C
Targettemperature adjusted set-point temperature on the knob / °C

AC ELWA®-E Operation Manual, Version 00200.01 8
Boost active 0: Boost inactive
1: boosting via time control
2: manual boost
Next legionella boost on/off, days
Time system time of the device / hh:mm:ss
Control Status describes the current control mode
Block active Shows whether the device is blocked
Depending on which other measurements are queried in the system (see "Measurement
Settings"), the status overview also provides information on these variables.
Data logger
A graphical information of the operating data is provided in the data platform my-PV.LIVE (see
"Cloud Mode").
Setup
On this page all adjustments of the device can be made.
Boost Settings
As an option, the AC ELWA-E can also ensure a minimum temperature in addition to the normal
excess power operation. During backup operation the device is supplied with a power of 3kW.
Boost Mode Off
This is the factory preset. Hot water securing is deactivated. Only PV-excess
is used.

AC ELWA®-E Operation Manual, Version 00200.01 9
Offline Active
Hot water securing works independent from the status
of the network-connection (even at network-incidents).
With the button „Single Boost“the hot water backup can be started
immediately once
Boost Temp Set-point temperature for hot water backup
Start Hour1: Start of boost time window 1
Stop Hour1: End of boost time window 1
Start Hour2: Start of boost time window 2
Stop Hour2: End of boost time window 2
Two boost timeframes can be defined per day. These frames may overlap.
Start hour and stop hour refer to the same calendar day. If a time window is defined over
midnight, hot water backup will not start!
If start-hour and stop-hour are identical, boost-backup starts one-time until the set-point
temperature is reached.
If the adjusted start-hour is after the stop-hour, hot water backup will not start!
Legionella Protection
To ensure drinking water hygiene, a period of time can be specified up to which an adjustable
minimum temperature must be reached again after the last time this value has been reached.
The number of days of this period is adjustable between 1 and 14. A time at which the
legionella program is to be started can be specified. The factory preset values of the days is 7,
the start time is 8 pm, the temperature is 60 °C, the legionella program is "Off".
The AC ELWA-E is then supplied with a power of 3kW.

AC ELWA®-E Operation Manual, Version 00200.01 10
Time
In case of an available internet connection via a router, AC ELWA-E gets its time setting
automatically from the web but it doesn’t determine the particular time zone. That information
can be transferred from the Laptop/PC by pressing the „Save/Speichern“ Button. The re-setting
of the ELWA-time to the new time zone can last a few minutes.
Usually the time zone on the Laptop/PC shifts with the change from summer to
wintertime. This shift can also be adopted with the „Save/Speichern“ Button. An automatic
time shift from summer to winter is not scheduled.
NTP-Timeserver-address: can be changed if necessary. (NTP = Network Time Protocol).
When there is no connection to the internet, the current time zone setting can be transferred
from the Laptop/PC by pressing „Set to PC Time / Auf PC Zeit stellen“.
If the device has no internet connection via router, the time setting is lost after a power
outage.
Control Settings
In this section the choice of the signal source for the AC ELWA-E is made.
A control type can only be selected if the AC ELWA-E has the factory preset device number
1. See "Basic settings".
Besides the my-PV Power Meter and open communication protocols such as http, Modbus TCP
and Adjustable Modbus TCP, pre-set signal sources are available for these manufacturers:

AC ELWA®-E Operation Manual, Version 00200.01 11
Signalsource
Comments
Carlo Gavazzi
Approved for meter type EM24 with Modbus TCP .
Fronius
Smart Meter required.
For Modbus control Sunspec must be activated.
Huawei
Sunspec must be enabled on inverter.
KACO TL1 + TL3
Sunspec must be enabled on inverter.
Kostal PIKO IQ Plenticore plus
Suitable electricity meters please refer to the Kostal descriptions.
Kostal Smart Energy Meter
Device ID as set on the device.
MEC electronics
Approved for meter type MECmeter.
RCT Power
-
SMA Sunny Home Manager
-
SolarEdge
Sunspec must be enabled on SolarEdge
Steca
-
Varta
-
Victron
With Modbus control, the excess power control can be selected according to
one or three phases.
TIP: For many of these and other manufacturers there are separate
instructions for the required settings. More information about compatible
manufacturers can be found here.
Not every control type is approved for hybrid systems with battery storage. If required,
please contact the technical support of my-PV.
For some control types the IP address must be set manually. This must not change during
operation (e.g. by a DHCP router), otherwise the AC ELWA-E loses the control signal.
When controlled by an inverter, a feed-in meter is required in the system. The query of
the inverter otherwise provides no data.
We ask for your understanding that we cannot do any binding support for third-party
products. For questions about third-party products, please contact the technical support of the
respective company.
Operation with battery may require additional control parameters. In this case, please
contact the technical support of my-PV.
As a factory pre-set the control mode „Auto Detect“ is present. The device automatically
searches for compatible sources. Some compatible manufacturers are not recognizable by the
"Auto Detect" function!
The “Auto Detect”function can only be effective when just one signal source is present in the
network. If there are more different sources (e.g. several inverters), a manual setting is essential
for a correct functionality!
For certain compatible sources the choice between „Auto“ (automatic IP-search of the device)
or „Manual“ (manual entry of the IP address of the source) is possible. „Manual“ is necessary

AC ELWA®-E Operation Manual, Version 00200.01 12
when there are several compatible sources in the network and a special one of them should be
chosen as the control system.
The control mode "my-PV Power Meter direct" has to be selected when a direct data
connection between the Power Meter and the AC ELWA-E is made (without network).
For this type of connection a crossover patch cable has to be used!
If the AC ELWA-E is also used for the optional hot water boost-backup, then the direct
connection is not recommended since time and boost-backup settings are much easier to set
via the network!
It can take up to a minute before the direct connection is established!
With the setting „Power Timeout“the timeout of AC ELWA-E can be changed for the modes
„http”, „Modbus TCP“ and „Adjustable Modbus TCP“.
The parameter "Control Target" specifies the set point of the power at the metering point. A
negative value means feed-in. The factory pre-set of the set-point is -50 W. This parameter can
be freely chosen in a range between -500 and +500 W.
The function „Block“ allows to define a time window within AC ELWA-E must not run. Unlike the
two time frames for hot water securing the transition to the following day is possible (Start
Hour is higher than Stop Hour). For example, this function can be used to give an existing
battery time for charging and to do the water heating subordinate.
Changes of the time settings are effective within one minute.
With the "Adjustable Modbus TCP" control mode, the AC ELWA-E receives the power-value in
the feed-in point from an inverter or Modbus counter. The required communication registers
shall be set according to the manufacturer's description.
Device ID must be set to the Modbus ID of the external device.

AC ELWA®-E Operation Manual, Version 00200.01 13
This type of control is currently not approved for hybrid systems with battery storage.
With the settings "Adjustable Modbus TCP (Sunspec etc)", the IP address of the signal
source must not change during operation (eg by a DHCP router), otherwise the AC ELWA-E loses
the control signal.
When controlled by an inverter, a feed-in meter is required in the system. The query of
the inverter otherwise provides no data.
We ask for your understanding that we cannot do any binding support for third-party
products. For questions about third-party products, please contact the technical support of the
respective company.
Operation with battery may require additional control parameters. In this case, please
contact the technical support of my-PV.
Measurement Settings
As an option, other measurements can be queried in the system in addition to PV excess
measurement and visualise them on the my-PV.LIVE data platform. Available variables are PV
power, Battery power, EV Charging station power and Heat pump power.
If you are using the my-PV Power Meter to detect these values, you must enter the ID (serial
number) of the device. You will find this number on the device.
If the measured values come from an inverter or Modbus meter, the required communication
registers shall be set according to the manufacturer's description.

AC ELWA®-E Operation Manual, Version 00200.01 14
EV Function
More information on compatible charging stations can be found here.
Multi Units
Several AC ELWA-E, AC•THOR or AC•THOR 9s can also be used in a network. Operation is based
on the master/slave principle.
When using several devices the following things have to be considered:
All devices must be connected to the router via a network cable.
Only one master can be assigned to a signal source and vice versa.
A maximum of 10 slaves are possible per master.
All slaves in the network must have different device numbers, even if these are assigned to
different masters.
All devices must be assigned by permanent IP addresses. This can be done in two ways:
oIn the Web-Interface of the respective device (see IP Settings) or via Cloud
oBy the router (recommended)
Settings on Slaves
For the slaves only the device numbers have to be specified (see Basic Settings). All other
settings are only required on the master.

AC ELWA®-E Operation Manual, Version 00200.01 15
As soon as an assignment has been made, further control settings are no longer possible or
required. The IP address field is disabled and “Slave”appears in the Control type field.
After a device search in the quick selection at the top right, the slave with the set number
appears. Switching between the devices is possible here.
Settings on Master
Only for devices with number 1 (= master) the following display appears in the setup:

AC ELWA®-E Operation Manual, Version 00200.01 16
To make the settings for several devices on the master, first choose between Synchron and
Stratify. In the case of synchronous charging, the power is evenly distributed to the master and
its slaves. In the case of stratified charge, the devices are controlled one after the other
according to their numbers, in each case until the set target temperature is reached.
After selection, please start the "Search for slaves" and activate the desired devices. Then save
the setting.
Scanning is performed via UDP port 16124. Firewalls (or specific router settings) may
prevent the AC ELWA-E from being found.
(see Placing into operation with router)
IP Settings
DHCP: Selection of DHCP is standard, which means the device requests an IP
address from the router to which it is connected.
This only works when the router is configured as a DHCP server.
Static IP: If there is no DHCP server active in the network or third-party control is
desired, a static IP address is necessary.
The settings have to fit with the router, otherwise the device become invisible in the
network!
Basic Settings

AC ELWA®-E Operation Manual, Version 00200.01 17
Number: Ex-factory each AC ELWA-E is assigned the number 1. If several devices are
used, this setting must be adjusted for the "Slaves" (see Multiple devices).
Fusetyp: If the device is connected to a 13 A plug socket, the 13 A setting restricts
the maximum power to 2,500 W.
Cloud Mode
TIP: Inform yourself in advance on the Cloud Mode simply by watching our video
explanation (activate English subtitles): https://youtu.be/tJtAvwM7-7Q
If your device has a device key, a connection to the data platform my-PV.LIVE possible. You will
find it glued on the enclosed assembly instructions.
Activate the cloud mode and save the settings.
Open the website www.my-pv.live and log in or register as a new user.
TIP: If you register for a new account you will receive an email with a
confirmation link. If it does not appear in your inbox, it might be in your spam
folder.

AC ELWA®-E Operation Manual, Version 00200.01 18
Edit device overview
Add Device
Choose a name that is as unique as possible
and enter the serial number and the device
key (without hyphens) of your device. Click on
Save.
If the cloud mode has been activated, an
overview of the operating data recorded from
then on is available after connecting the
device to the data platform.
Privacy
Information on the privacy regulations can be found at www.my-pv.com.
Debug-Mode
In order to simplify the analysis in the case of possible connection problems, a debug mode can
be activated in coordination with our technical support.
Firmware Version
In this section the current firmware versions can be retrieved (for service and Update purpose).
Details about the button "Update Firmware" can be found in the chapter "Firmware Update
Ethernet".
The button "Reboot Device" restarts the AC ELWA-E.
With the button „Factory Reset“ all settings of the device are set back to factory pre-set. After
pressing the button a confirm message appears.

AC ELWA®-E Operation Manual, Version 00200.01 19
Consider that depending on the router settings the AC ELWA-E eventually is no longer visible in
the network. To find it again restart the AC ELWA-E program „my-PV Scanner 1.XX.exe”. For this
reason, you cannot be automatically redirected to the AC ELWAE´s Web-Interface after reset.
6. Knob adjustments
The following sections describe the possible settings with the knob.
The device parameterization is much more comfortable via the Web-Interface!
The target temperature for the regular operation mode has to be adjusted with the knob.
Target temperature cannot be set via the Web-Interface, only queried.
Adjust fuse type of the circuit (13A/ 16A)
With factory preset AC ELWA-E can perform up to 3.000 W (16 A). For circuits with 13 A fuses the
power consumption can be limited to 2.500 W (setting on the AC ELWA-E or via Web-Interface
possible).
Configure the device as follows:
1. Disconnect power plug
2. Set adjusting knob to the symbol
3. Plug in the power plug
4. All 3 LEDs blinking (Setup mode active)
5. Turn the knob to the 13A marking
6. LEDs blinking from top to the bottom: green, yellow, red, green, etc.
7. Value is automatically saved when the position of the knob is not changed for 5 seconds
8. All 3 LEDs blinking fast for 2 seconds, setting saved.
9. Set the knob to the desired temperature value
The setting can be reversed. For this purpose repeat procedure.
Adjust device number
1. Disconnect power plug
2. Set adjusting knob to the symbol
3. Plug in the power plug
4. All 3 LEDs blinking (Setup mode active)
5. Turn the knob to the desired device-number marking
LEDs blinking to signal the number (see table)
AC ELWA-E
number:
LED green
LED yellow
LED red
1
blinking
off
off
2
off
blinking
off
3
blinking
blinking
off
4
off
off
blinking
5
blinking
off
blinking
6
off
blinking
blinking
6. Value is automatically saved when the position of the knob is not changed for 5 seconds
7. All 3 LEDs blinking fast for 2 seconds, setting saved.
8. Set the knob to the desired temperature value

AC ELWA®-E Operation Manual, Version 00200.01 20
The setting can be reversed. For this purpose repeat procedure.
7. Protocol description of http and Modbus TCP
These are described in a separate document which will be provided on request.
8. Firmware Update Ethernet
Before updating, please consider whether you really need an update! After the update,
the view of the "day-chart" from Ethernet versions before 200.00 is no longer available locally.
For the graphic display of the operating data, my-PV.LIVE must then be used. A connection to
my-PV.LIVE is only possible for devices from 160124171114XXXX!
From serial number 160124180131XXXX the update is no longer carried out with USB
cable. The firmware is downloaded via the Internet instead.
For serial number older than 160124180131XXXX a remote firmware-update via Internet
is not possible. It is instead done with a USB cable.
Update from Server (from SNr 160124180131XXXX)
Internet access is required!
With the "Update Firmware" button, the AC ELWA-E loads the latest firmware from the Internet.
After the update, the AC ELWA-E is automatically restarted.
Update with USB cable (for SNr below 160124180131XXXX)
The update of the firmware for the communication via Ethernet happens via the Micro USB
interface and the provided USB cable at the bottom of the unit. A firmware update via the
Ethernet interface is not possible because of security reasons.
Get the Firmware here.
9. Fault indication
No display: Check power supply.
Check fuse of the circuit.
Check if there are other loads on the circuit of the AC ELWA-E.
Red LED on: No controlling. Can be interrupted by green blinking LED in one minute
cycle. (search function)
1x blinking over-temperature safety protection activated. Device must be checked by
customer service.