Communication Fault between Manager and Master
Posted: Mon Apr 27, 2026 5:43 pm
Hello All,
I've been reading a few threads about the latest Manger, Master and Slave Firmwares causing issues. I saw this was back at the start of April. From what I understand these were pulled (it does not seem like it was pulled for all Inverters).
I have a H1 G2 5.0 inverter and an EP11 with the Data logger that supports the 5second intervals.
However, I did not see this thread and this morning saw the update in the app so tried it.
I got a SLI fault and a 'Communication Fault between Manager and Master' with my Master and Slave stuck on 0.00 with my manager at 1.70.
I called both my installer and Fox to see if they could roll back the Manager F/W, I am awaiting to see what they say but I can see my system was fully offline (no PV or battery draw), so they've obviously had no luck.
I have tried a few full restarts of the inverter and no luck, however over the past few hours while waiting for them to get back to me I've been trying the Master F/W update over and over and eventually after the 8th time I think it worked. My system seems to be back up and running.
I'm kicking myself for updating now, I should just ignore updates if all is working fine...
Just wanted to post this for anyone else who may get this to keep just trying the update if you get booted down to 0.00 on your master and slave.
I've been reading a few threads about the latest Manger, Master and Slave Firmwares causing issues. I saw this was back at the start of April. From what I understand these were pulled (it does not seem like it was pulled for all Inverters).
I have a H1 G2 5.0 inverter and an EP11 with the Data logger that supports the 5second intervals.
However, I did not see this thread and this morning saw the update in the app so tried it.
I got a SLI fault and a 'Communication Fault between Manager and Master' with my Master and Slave stuck on 0.00 with my manager at 1.70.
I called both my installer and Fox to see if they could roll back the Manager F/W, I am awaiting to see what they say but I can see my system was fully offline (no PV or battery draw), so they've obviously had no luck.
I have tried a few full restarts of the inverter and no luck, however over the past few hours while waiting for them to get back to me I've been trying the Master F/W update over and over and eventually after the 8th time I think it worked. My system seems to be back up and running.
I'm kicking myself for updating now, I should just ignore updates if all is working fine...
Just wanted to post this for anyone else who may get this to keep just trying the update if you get booted down to 0.00 on your master and slave.