my-PV AC ELWA-E Operation Manual

AC ELWA®-E Operation Manual, Version 00101.01 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. Factory presets ................................................................................................................................. 2

5. Placing into operation with router (recommended) ..................................................................... 3

6. Placing into operation without router ............................................................................................ 4

7. Web-Interface.................................................................................................................................... 4

Home (homepage) ............................................................................................................................ 5

Status ................................................................................................................................................. 6

Day Chart ........................................................................................................................................... 6

Setup .................................................................................................................................................. 7

Boost Settings................................................................................................................................ 7

Time Settings ................................................................................................................................. 7

Control Settings ............................................................................................................................. 8

Several devices .............................................................................................................................. 9

IP Settings ....................................................................................................................................11

Basic Settings ...............................................................................................................................12

Debug-Mode ................................................................................................................................12

Firmware Version ........................................................................................................................12

8. Knob adjustments ..........................................................................................................................12

Adjust fuse type of the circuit (13A/ 16A) .....................................................................................12

Adjust temperature for automatic hot water securing (Boost) .................................................13

Adjust device number ....................................................................................................................13

9. Protocol description of http and Modbus TCP ............................................................................14

10. Firmware Update Ethernet ............................................................................................................14

11. Fault indication ...............................................................................................................................15

AC ELWA®-E Operation Manual, Version 00101.01 2

1. Assembly

Before placing into operation it is essential to read the assembly instructions provided with the
device.

2. Controls and displays

The possible adjustments are described in the chapter „knob adjustments“.

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

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. Factory presets

 Automatic hot water securing (Boost-mode) off (Winter setting)
 Set-point temperature for Boost-mode 35°C
 Time window for Boost-mode 5 - 11 pm and 5 - 7 am

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 00101.01 3

 Auto-Detect function active (searches for control devices automatically)
 Timeout for http and Modbus TCP control 10 seconds
 Time window for blocking time 0-0 (no blocking)
 Device number 1 (Note: is shown in the Scan Tool and on the router in the DHCP list)
 16A fuse protection of the plug socket

5. Placing into operation 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

Searching for AC ELWA-E by using the software „Scan AC ELWA-E.exe“
(contained in „Software Package AC ELWA-E.zip“ at www.my-pv.com)

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 website of the AC ELWA-E.

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.

my-PV does not recommend to connect the AC ELWA-E to the Internet via port forwarding

access!

AC ELWA®-E Operation Manual, Version 00101.01 4

6. Placing into operation without router

1. Set adjusting knob to the symbol (all three LEDs blinking)

2. Plug in AC ELWA-E power plug

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“)

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. Select Button „Setup“ and configure as described in chapter „Setup“

10. After all the settings have been made, disconnect the AC ELWA-E power plug and turn the

knob to the desired temperature

11. Disconnect the data connection between AC ELWA-E and Laptop/PC

12. Connect AC ELWA-E via standard Rj45-cable („patch-cable“) with router

Do not connect the device directly to the inverter or the battery system!

13. 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!

7. Web-Interface

Via web browser different data of the AC ELWA-E can be retrieved and adjustments can be
made. From the homepage further pages can be selected via the menu buttons. Consider that
the appearance and the scope of options can change with updated software versions.

AC ELWA®-E Operation Manual, Version 00101.01 5

Home (homepage)

The graphic shows the current temperature in the boiler, the bar on the left visualises the
power output of the device.

In the section „Boost Mode“ hot water securing can be activated.

This option is disabled as a factory preset („Off/Aus“). It is intended as “winter-mode” when the
normal heating system does the space heating and additionally ensures the hot water. In this
operating mode AC ELWA-E exclusively uses excess energy.

In „On/Ein (Summer/Sommer)“ mode, hot water securing is made regularly up to the desired
temperature at the time windows defined in the setup. This setting is recommended for
summer because usually the high solar coverage ratios at this time mean just a little demand
for backup from the grid. A potentially non-economical and un-ecological start of the heating
system is not required.

Regardless of that, the hot water securing can be started one single time with the button
„Single Boost / Sicherstellung einmalig starten“.

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!