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MX60 Snoozing --> WakeUp --> Sweeping --> LowLight

Posted: Tue Apr 16, 2019 12:35 pm
by mikeysklar
I've been transitioning my 2008 off-grid install into a 2019 grid-tie install. The trouble I'm having is that the charge controller is seeing my battery voltage and PV voltage, but refuses to bulk charge. The MX60 is stuck in a cycle of:

Snoozing --> WakeUp ---> Sweeping --> LowLight --> Snoozing

Once the relay clicks on WakeUp the PV voltage drops from 74v to battery voltage then the system switches to sweeping and the PV voltage climbs back up until the process repeats. I've seen this mentioned on several threads, but with no conclusion other than the the MX60 could be damaged.

Re: MX60 Snoozing --> WakeUp --> Sweeping --> LowLight

Posted: Wed Apr 17, 2019 8:22 am
by Mike Curran
Definitely sounds like your MX60 is at fault.

This video shows how mine behaves from a dead startup- PV input breakers off, then turned on: https://youtu.be/dHQ7WI9_VzM

May not be directly applicable (it never goes through a sweep cycle in this scenario) but it does show that the PV voltage never drops to the battery voltage.

Sorry for the shaky video, trying to hold tablet cam in one hand while turning on breakers with the other :smile: