# Modbus SolarEdge SE8K RTU

**URL:** <https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744>\
**Category:** General\
**Created:** [16 May 2020 10:41 UTC](https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744 "2020-05-16T10:41:28Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![el.indifferente](https://avatars.discourse-cdn.com/v4/letter/e/8c91f0/32.png) [@el.indifferente](https://discourse.nodered.org/u/el.indifferente)\
**Post date:** [16 May 2020 10:41 UTC](https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744/1 "2020-05-16T10:41:28Z")

</div>

Hi,

Done some programming before in my life, but I thought it would be funny to start something new and so I ended up with NodeRed on a RPi3.

My neighbour does have a SolarEdge photovoltaik inverter plus a meter, according to specs working with modbus. Could be via TCP or via RTU (USB-RS485 dongle on an RPi3).

Installed the modbus contrib package to NodRed and try to read the data. When I derectly debug-print the output happening on the serial device (/dev/ttyUSB0) I do see data but it is not in a format that is readable to me. To the contrary, when I try this with the modbus-flex-getter it also does not matter, if I use TCP or RTU. Flex-getter is always initializing and then reconnecting but I can not get the connection "stable", to see anything in th modbus-read afterwards.

Could someone please give me a (friendly, please, I'm new here) nudge, to open up a new perspective to me?

Thanks.

---

<div class="post-metadata">

**Author:** ![DrdP](https://avatars.discourse-cdn.com/v4/letter/d/b5ac83/32.png) [@DrdP](https://discourse.nodered.org/u/DrdP)\
**Post date:** [16 May 2020 20:48 UTC](https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744/2 "2020-05-16T20:48:11Z")

</div>

Hello,

I an no expert but have you tried adding a modbus response node after the nodbus read node? This response node will show you the raw data.

What value were you expecting and what are you actually receiving? A screenshot may help us in seeing what you are seeing.  
D

---

<div class="post-metadata">

**Author:** ![el.indifferente](https://avatars.discourse-cdn.com/v4/letter/e/8c91f0/32.png) [@el.indifferente](https://discourse.nodered.org/u/el.indifferente)\
**Post date:** [17 May 2020 12:04 UTC](https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744/3 "2020-05-17T12:04:16Z")

</div>

Hi there,

good point. Have attached a screenshot of the actual flow

 ![node_red_flow](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/e/d/edf9bc74d14f81060cf7581690ceae056375a599.png) .

As you can see, I had tried to directly print what is on (/(dev/ttyUSB0) for ... kind of lame debug purposes, if any data is there.

The string of the raw data from the flex-getter is empty.

Thanks a bunch for your support.

El.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [16 July 2020 12:11 UTC](https://discourse.nodered.org/t/modbus-solaredge-se8k-rtu/26744/4 "2020-07-16T12:11:14Z")

</div>

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.