KH Firmware Manager 1.60 / Master 1.64 - potential issue

Wed Mar 25, 2026 7:55 pm

I’m just copying a note from Will as he has updated his KH series inverters to the latest master and manager firmware and the inverters are now stuck with a grid voltage fault even when confirmed that mains power is normal to the plug.

He is going to downgrade and test again but it looks like there might be an issue with these versions so hold fire right now.

UPDATE: Downgrading resolved the grid lost issue - for now hold off upgrading to these versions.

MaterialBarracuda48 · Wed Mar 25, 2026 9:31 pm

Thanks for the heads up, thankfully it doesn't yet show as an update (for now)

MaterialBarracuda48 · Fri Apr 03, 2026 5:51 pm

Dave/Will, this is being pushed now by Fox... should we avoid at all costs, or is this a safe upgrade?

Fri Apr 03, 2026 6:32 pm

MaterialBarracuda48 wrote: ↑Fri Apr 03, 2026 5:51 pm Dave/Will, this is being pushed now by Fox... should we avoid at all costs, or is this a safe upgrade?

We’ll need Will to confirm, the last thing I heard is that it was the Master 1.64 that caused the problem - Manager 1.60 itself was ok.

Ijmorrison · Fri Apr 03, 2026 6:39 pm

Just saw this pop up and tried it but getting a -1 error saying version are out of sync so looks like someone somewhere may have disabled it.

I'm hoping this fixes the last monumental mess up of firmware that has left me scheduling manually for the past month!

System was installed December and must admit I'm significantly underwhelmed with it.

Iain

MaterialBarracuda48 · Fri Apr 03, 2026 7:16 pm

Dave Foster wrote: ↑Fri Apr 03, 2026 6:32 pm We’ll need Will to confirm, the last thing I heard is that it was the Master 1.64 that caused the problem - Manager 1.60 itself was ok.

Thanks Dave,

Hopefully Master 1.64 has been fixed now, but will hang fire a few days and see if Will has some news for us all.

davidwf15 · Fri Apr 03, 2026 8:33 pm

I would suggest not.....see
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