Data dropouts that have only started recently

[greensolarostrich]

I seem to be getting some odd behaviour recently.
I keep getting very intermittent data coming into HA.

Code: Select all

Error connecting to inverter (friendly name: ""). Error reading registers. Type: RegisterType.HOLDING; start: 31007; count: 22; slave: 247 from tcp://192.168.1.137:502: Modbus Error: [Input/Output] No Response received from the remote slave/Unable to decode response

Code: Select all

2026-09-16 13:13:56.345 DEBUG (MainThread) [custom_components.foxess_modbus.modbus_controller] Modbus error when polling tcp://192.168.1.137:502 247: Modbus Error: [Input/Output] Modbus Error: [Invalid Message] No response received, expected at least 8 bytes (0 received)
2026-09-16 13:14:02.226 DEBUG (MainThread) [custom_components.foxess_modbus.modbus_controller] Reading addresses on tcp://192.168.1.137:502 247: (31007, 22)
2026-09-16 13:14:02.227 DEBUG (SyncWorker_1) [custom_components.foxess_modbus.client.custom_modbus_tcp_client] Connecting to ModbusBaseSyncClient._params(retries=3, retry_on_empty=True, broadcast_enable=False, reconnect_delay=None, source_address=None)

After a restart or just some amount of time the data comes back but only for 3-4 hours then it may be very patchy for a period of time. I can't seem to pinpoint the exact issue, it's been working faultlessly since day 1 when my solar system when in a few year ago.
I have tried running the latest beta of the H.A integration (1.16.0b2) but it actually prevented me even connecting so I needed to roll back to get connected again.

Setup:
EW11 Modbus adapter - no issues with connectivity to the device & data has been flowing well for the past 2 years-ish with no such drop out. Running 1.44.1

Fox H1 5kW G2 (Master 1.59, Slave 1.04, Manager 1.78) DataLogger W6 1.08)
(I see there are update for the Datalogger to 1.11 and Manager to 1.79 but have no done them as last time it took out my system for 6 hours)

Fox EP11-H
Home Assistant - HASOS on bare metal
Core 2026.9.2
Supervisor 2026.09.0
Operating System 18.2


I did see a different thread relating to the G3, but the beta did not resolve my problems, so posting here.

Thank you for any help!

[MaterialBarracuda48]

Assuming your HA is hardwired to your inverter.

Although rare, there was a forum member having HA dropouts, turns out the cable had snapped a little in the connector block. Worth a look to see if that applies to you?

[greensolarostrich]

Assuming your HA is hardwired to your inverter.

Although rare, there was a forum member having HA dropouts, turns out the cable had snapped a little in the connector block. Worth a look to see if that applies to you?

Ah, that’s a good thing to check, I’ll head out at lunch and take a look.

[MaterialBarracuda48]

I just remembered that I have also seen some HA dropouts myself a long time ago, it was temporary and rectified itself. So it could be firmware related to the inverter, or some glitch with HA (was around start of this year)