For sure you need to discover the local ip addresses of both modbus and homey, as far as I suppose to be correct, they must be on the same sub. They also need to be fixed (by mac reservation or stationary). As I assume the above is known by you, I have no further suggestions to be honest.
I figured it out 
Gemini gave me the answer step by step. Thanks again and thank you @Edwin_Biemond 
Yesterday I installed this app for my Sigenergy system and it is showing the energy usage of the system not the PV input in the energy tab.
Do I need to change something?
it depends , do you have an battery ? else it will be PV - minus charging. with discharging you get it back again.
Now the new modbus docs v2.7 has been released for the Sigenergy system. Now it looks like there a lot more data to fetch. Looks like there now is a PV daily generation parameter.
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Yes I have battery
ack, it is not pv only because at some time you will do discharge of your battery . so all manufacturers do pv - charge + discharge . as value. else your bookkeeping will be off and you have more produced energy than in reality.
but good thing with this month modbus pdf they added new attributes which I will add soon.
48 Plant PV total generation 30088 4 RO U64 100 kWh √ √
49 Total load daily consumption 30092 2 RO U32 100 kWh √ √
50 Total load consumption 30094 4 RO U64 100 kWh √ √
108 Total energy consumption of common loads 30228 4 RO U64 100 kWh √ √
New statistics interface, excluding EVACandEVDCcharged energy.
107 PV daily generation 31509 2 RO U32 100 kWh √ √
108 PV total generation 31511 2 RO U32 100 kWh √ √
yes @Lennie_Bergqvist already gave it to me , got some data already . only need to have verification the data is correct.
How does the version handling for this app work, when I look at the official app it says it was latest updated 6 months ago, but there are a lot of later versions released according to the version log, are they all “test” versions only in the past 6 months? I know I can install the test version, is that the one I always should use for this app or will the test versions become stable ones soon?
test should also be stable , it is more for new devices , small changes. master is mostly used by solaredge devices which did not have any important change in months.
probably will do it soon.
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Hello Edwin.
The app updated automatically a few minutes ago to version 3.0.213, and now my Sigenergy device is not working anymore.
Diagnostic report: d6b28c53-6f70-4934-8f20-234cf65fcdbc
Any idea why? Thank you in advance!
Best regards,
AH
Version 3.0.215 fixed it. Thank you
sorry for that, sigenergy release a new firmware which had 5 new attributes plus added right fields to energy tab.
@DaneedeKruyff can you test this 1 SolarEdge + Growatt TCP modbus | Homey
made a new device for your inverter
Hi Edwin,
Thanks, I’ve installed it and added my inverters, now we’ll just have to wait for some sunshine 
Will let you know as soon as possible.
