SunSynk-SolarMan comms not stable. Is wired better?

[simple1976]

Hi Team,

Need some ideas/suggestions.

We have HA Green, running HA + EMHASS + Deye/Sunsynk Home Assistant Addon (multi). Operating 2 x parallel (Master/Slave) DEYE SUN-8K-SG05LP1-AU inverters.
We get consistent comms errors with occasional loss of comms(requires addon restart), but only on the addon, not on SolarMan native web interface.
Example of running errors:
11:05:00 ERROR (1 in 5 min) OSError in read_sunsynk: timeout reading 1 registers from 59 poll_need_to_read
11:08:09 ERROR OSError in read_sunsynk2: timeout reading 1 registers from 59; timeout reading 1 registers from 79; timeout reading 2 registers from 109; timeout reading 1 registers from 150; timeout reading 20 registers from 164; timeout reading 11 registers from 184; timeout reading 1 registers from 219; timeout reading 6 registers from 243; timeout reading 2 registers from 314 poll_need_to_read
11:10:00 ERROR (1 in 5 min) OSError in read_sunsynk: timeout reading 10 registers from 210 poll_need_to_read
11:10:00 ERROR (1 in 5 min) OSError in read_sunsynk2: timeout reading 1 registers from 59; timeout reading 1 registers from 79; timeout reading 2 registers from 109; timeout reading 1 registers from 150; timeout reading 20 registers from 164; timeout reading 11 registers from 184; timeout reading 1 registers from 219; timeout reading 6 registers from 243; timeout reading 2 registers from 314 poll_need_to_read
11:10:06 INFO Queue update prog6_charge=No Grid or Gen
11:10:07 INFO Writing sensor prog6_charge=No Grid or Gen Registers:{279=0x0000} [Register 0-->0]
11:10:16 INFO Queue update prog6_capacity=5
11:10:17 INFO Writing sensor prog6_capacity=5 Registers:{273=0x0005}
11:10:17 ERROR Error retry attempt(0): Connection already closed
11:10:20 ERROR OSError in read_sunsynk2: timeout reading 1 registers from 59; timeout reading 1 registers from 79 poll_need_to_read

Q1: Any suggestions with errors fix or stability fix? Ideas on cause?
Q2: If we to wire HA Green to Sunsynk via USB->RS485 adaptor, would it improve/resolve issue?
Q3: What is ideal connection configuration between Pi and Inverter? Wifi/RS485/RS232(remove dongle, use it's port)?