EG4 6000XP and SolarAssistant

EG4_Jarrett said:

Sorry, I didn't see the tag in my notifications or I would have responded sooner.

I haven't played around with any of the 3rd party stuff yet, so I don't know right off the top of my head, but I will do some research and see what I can find out!

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@EG4_Jarrett did you ever get a chance to dig into this? I'd really like to be able to query the inverter directly using RS485, in addition to using the wifi dongle if possible. The only RS485 pins I've found that are referenced explicitly are pins 1/2 in the BMS port, but those don't seem to respond to input register query commands. I expect those pins are setup as a modbus master in order to query BMS devices and aren't going to act as a modbus slave.

Can you clarify the language in the current 6000XP manual regarding what exactly is meant by "Meters 485B and 485A can be used when a meter is not connected"?? I'm not sure what "meters" they're referring to, but it's not the wifi dongle since apparently the wifi dongle shares a connection with the INV485 port, whatever THAT is

Cheers,

-A

Ambrotos said:

-A

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I addressed this here.

jsmithtx said:

I addressed this here.

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Very cool information there.

jsmithtx said:

I addressed this here.

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Amazing. Thanks so much for sharing, and sorry I didn't find that post in my searching.

Clarifying question though: I'm assuming the black/white wires are the RS485 bus referred to in the documentation as "INV485", and the other two wires are GND/VCC to power the wifi dongle. Is that a safe assumption? The implication there is that if I take the black/white wires for direct modbus communication then the wifi dongle will stop working. If that's true, do you know where the "Meter 485A" and "Meter 485B" pins (referred to in manual section 8.2) are? I only ask because I've been using the lxp-bridge project to pull inverter data into my MQTT broker, and that communicates via the wifi dongle. I still have this dream of being able to do both wifi dongle and direct modbus access at the same time. Maybe that's wishful thinking I have some hope that it's possible since Tip #2 on page 7 of the RTU protocol manual talks about keeping your polling interval above 1 minute if you're trying to use both the wifi dongle and rs485 at the same time...

-A

Ambrotos said:

Amazing. Thanks so much for sharing, and sorry I didn't find that post in my searching.

Clarifying question though: I'm assuming the black/white wires are the RS485 bus referred to in the documentation as "INV485", and the other two wires are GND/VCC to power the wifi dongle. Is that a safe assumption? .... if you're trying to use both the wifi dongle and rs485 at the same time...

-A

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So my wifi is entirely disconnected... the security on it is atrocious. It broadcasts an unsecure wifi network that anyone can join. So I connect to the black and white wires for the RS485. I'm not sure how you would 'share' it.

You definitely can't share them; only one master allowed per rs485 bus. My point was just that the manual and RTU documents both strongly imply there are two separate RS485 busses - the INV485 bus and the "Meter" bus. I still don't know where the Meter bus pins are though.

Agreed the Wifi dongle is unbelievably insecure. I couldn't believe it when I discovered they still broadcast the unsecured AP even after connecting the dongle to your wifi. I assumed they did the same thing every other Espressif-based device in the world did and only used the local AP for initial setup. I'll definitely be pulling it out once Solar Assistant supports some other connection method.

-A