I cannot reproduce your issue, so I have no idea why it doesn’t work for you. But in the coming months I will come with more app updates, so please be patient and keep your fingers crossed one of the updates fixes your issue. 
Growatt is not always stable, if you have multiple paths to ask the Growatt API for data, do not do that more than once ever 10 - 15 minuts. And I am very used that their API is often not working for me.
I have 2 homey’s, the app on my phone, Tibber cloud (+P1_ and HomeWizard cloud (+P1) and all try to contact the API…
The once which seems to be the most stable is Tibber cloud Tibber also has a Homey app as well and provides me with the most stable Growatt data in Homey, besides what the P1’s give me.
So maybe If you buy Growatt, be prepaired to have regular connection issues to their API.
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In case of really bad API troubles from Growatt’s side (not Robin’s app fault) :
If your inverter supports it, people can use the aforementioned Growatt modbus app, which uses a local connection;
or, if the inverter is “API only”:
people can use the Grott app, which needs an additional pc (thin client / Raspberry Pi) to run a python script.
This puts itself “in between” your inverter and Growatt API, which provides for a very stable local network connection, and, if you allowed it, it keeps sending data to the Growatt cloud.
I have it poll every minute.
Completely rewritten app 2.0 is ready for testing: Growatt | Homey
- Full rewrite to official Growatt api.
- Added more (all?) device types.
- Added power limiting through inverter.
ATTENTION: BREAKING CHANGES!
This new version requires you to manually delete your existing devices, and add them again with your API KEY.
You can find your API KEY from the official ShinePhone mobile app:
My Account > Click on your name > API Token.
Make sure the ‘Use Status’ is ON.
3 Likes
Login went smooth, Robin; no data yet > it’s dark 
Edit: Now with daylight: Hi Robin, @RM_de_Gruijter, my inverter generates power, but the app shows no data yet.
Diag
93c90923-df17-4cbf-bfeb-6b8930195a90
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Anmeldung mit API an Growatt Batterie Noah 2000 hat problemlos funktioniert, Batterie wird erkannt es werden aber leider keine Daten angezeigt.
Freu mich wenn es funktionieren wird.
Danke 
Diagnosebericht →
1c5ca076-3b78-47ff-bef1-75e3be19d142
Hello everyone.
I installed the new app via the API, but I don’t think it’s collecting the data correctly. Here are my values for today.
Homey
ShinePhone
The Imported Energy (yellow) and Exported Energy (red) data are incorrect.
The Generated Energy (green) value also doesn’t seem right.
Is this an error? Or am I misunderstanding the data?
Thanks in advance.
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Hi I just got a homey pro and I am trying to create automations with flows that can change the behaviour of my battery based on the state of my solar panels or the energy price. But I can´t find any flow cards related to TOU or SOC etc. Is it not supported in this app? my setup is a PV -Growatt MID 15KTL3-XH with Growatt 15kWh - APX HV battery.
