# \[APP\]\[Pro\] SolarEdge + Growatt TCP modbus

**URL:** <https://community.homey.app/t/app-pro-solaredge-growatt-tcp-modbus/45487>\
**Category:** Apps\
**Tags:** app, pv-solar\
**Created:** [March 30, 2021, 10:17am UTC](https://community.homey.app/t/app-pro-solaredge-growatt-tcp-modbus/45487 "2021-03-30T10:17:23Z")\
**Posts on this page:** 1\
**Showing post:** 1582

<div class="post-metadata">

**Author:** ![DaneedeKruyff](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/daneedekruyff/32/964_2.png) [@DaneedeKruyff](https://community.homey.app/u/DaneedeKruyff)\
**Post date:** [June 9, 2025, 6:14pm UTC](https://community.homey.app/t/app-pro-solaredge-growatt-tcp-modbus/45487/1582 "2025-06-09T18:14:37Z")

</div>

Tested the flow cards for my Growatt, they’re not working ☹

These are the values read from the inverter, seeing some weird values there:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/f/3/f3ca0ee0099764fced5d9256ce2d865f92880d60.jpeg)

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/9/e9b56676b3c89faf7cf73b0fe51ee247e46d4932.jpeg)

I found a document online **Growatt Inverter Modbus RTU Protocol\_II** V1.05 2018-04-19 and used that in combination with the Modbus app by Ronny Winkler ([[APP][Pro] Modbus](https://community.homey.app/t/app-pro-modbus/104497)) to retrieve some values but I can’t say I get something useful/readable (But that’s probably me not familiar with the Modbus protocol)

I can read register 3, that returns 100 and register 4 which returns 255

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/c/acb2a7d70a78d1548a3830cdf79df4427cc34702.png)

Register 9,10 and 11 return 17483, 12950 and 12333

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/d/adb22e389128fcf1a8c8ea7693b57c7505761e95.png)

Register 88 returns 0

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/b/9/b9505ea5db30be0f69f193c25a78514fc62f6442.png)

This is one of the flows:

 ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/c/6/c6a8392628529722396b4cc735916b87791b339a.png)

I’m wondering if my inverter is using the Protocol\_II or maybe an older version…  
No idea how to proceed from here, any tips or things you need me to check @Edwin_Biemond?

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