AC 200 PL relay click-clack at dusk and dawn

I have two 430 Wp panels hooked to my AC 200 PL plus b210.

Every day, at dawn and dusk, there is a time of approximately 10 minutes, where I can hear a relay go click-clack every 2 seconds or so.
It seems the device is disconnecting from the PV when voltage drops below a threshold and then reconnects, because some voltage is building back up or so.

Does anyone have the same experience?

I am a little worried, that this overly frequent switching might prematurely wear down some component that is made for some thousands of cycles rather than millions …

@Heiko Sorry for late reply.
May I ask if you have the US version of the AC200PL?
The DSP 209815 for AC200PL has been bulk pushed, please do the firmware upgrade.
As for the frequent switching you mentioned, that is the sound of the relay switching. The relay has a lifespan of 100,000 cycles, so you generally don’t need to worry :)

I’ve the same issue with my AC200L. Firmware is up to date. The clicking was discussed in another thread a month ago. (search ‘AC200L: PV relay click’) Thank you @BLUETTI , the relay lifespan is good to know, although not as reassuring as seemed to me at first. The relay cycles on and off approximately once every two seconds for ten or so minutes at dusk. That’s three hundred cycles. I leave my panels permanently plugged in, so (300 x 365 > 100,000) That relay is going to be end of life in less than a year. Less than six months, if it’s doing the same at dawn. (I haven’t yet checked)

1 Like

Hi, thanks for getting back.
It is the EU version and its DSP is displayed as up to date with v. 2130.07.

Exactly. And if we assume, only 100 cycles twice per day and the relay lasts 50% longer than designed, it will give up just after the 2 year warranty. That would be the expensive worst case.

My S/N in case you want to push an update: AC200PL2402000187344

@Heiko Thanks for the information. I will check with the technician if there is new firmware.

@Heiko Please update the firmware to test.

Hi, sorry - I have not been home at my device before.
Please tell me how I can upgrade. When I go to the version settings tin the App, It is not showing me a new version or update button for the DSP.
It is still showing v2130.07
Cheers - Heiko