I have a single Growatt inverter connected to solar panels. I want to access the Serial data via an arduino. I have read the manual and am aware of the communication protocol. But the parameters I needed are Battery voltage and capacity, which according to the manual is not provided via the serial.
I wished if there was a way around this. The inverter I have is Off-Grid-4K-48V.
Don't you think you should share the manual with us? At least a link to that hardware should be possible, shouldn't it?
I am sorry about that.
http://www.snafu.priv.at/mystuff/growatt-proto.pdf is where I got the manual.
The following parameters: -PV voltage -AC output power -Energy produced at the end of the day are the ones that are useful.
Now is there a way to calculate Battery voltage and Battery capacity.
inverter
That's one of the worst manuals I've ever seen. I guess one of the voltages is that of the battery. Calculating the battery capacity might be possible but that depends largely on the battery type and I don't know how you get that calculated.
I would try to send some of these bytes to the inverter and see what you get in return. If it matches anything in that "manual" you might try the next parameter. Good luck. If the firmware is as good as the manual you'll fail.