Kindly advise on an issue discovered on a Deye 5Kw inverter in the wild (Nigeria) - offgrid. I believe on the hardware side the Deye & Sunsynk are the same, differences being on the software - user & installer interfaces. The issue that has been discovered on the Deye is that once the Low Battery Cutoff (LBC) kicks in & the SoC then goes below the LBC, the Deye will not come on via the Pv and one has to then contact Deye who will then log into the Deye system and do a firmware update.

 

Has this ever been found to be true or symptomatic, in the wild on any Sunsynk and if so, would the solution be similar (a firmware update direct from Sunsynk)?

So does it do the same thing after the firmware update. If so, what was the point of the firmware update?

On the Sunsynk there is a restart level, where you specify the % level at which the battery ought to have charged before the inverter self restarts. What is specified on your Deye?

 

Edit: The inverter will appear to be off, but if there is solar power it will charge the battery.

Edited February 17, 20223 yr by YellowTapemeasure

4 hours ago, P1000 said:

So does it do the same thing after the firmware update. If so, what was the point of the firmware update?

After the firmware update, the Deye was now working fine, so the update did work, it's just the issue of having to get in touch with installer and installer get's in touch with Deye to send an update, instead of getting regular updates when such things are picked up in the wild.

58 minutes ago, YellowTapemeasure said:

On the Sunsynk there is a restart level, where you specify the % level at which the battery ought to have charged before the inverter self restarts. What is specified on your Deye?

 

Edit: The inverter will appear to be off, but if there is solar power it will charge the battery.

On the Deye, the Pv would come on and then the Mppt would switch off meaning the battery would not get to be recharged, that was the issue.

Just had a similar issue. LBCO at 20%, Battery at 19%

PV would not charge the battery and grid was not available.

Had to take it up with Deye and they  have done an update.

Waiting to test it out

On 2022/02/17 at 12:26 PM, drsamuel said:

Just had a similar issue. LBCO at 20%, Battery at 19%

PV would not charge the battery and grid was not available.

Had to take it up with Deye and they  have done an update.

Waiting to test it out

Sorry to hear this. My disappointment is that once they knew (Deye) this was happening in the wild and they had the solution, they should have "pushed" all retailers, sellers and end-users with a "firmware update" which would have meant those not having yet experienced this would not have to. I'm still wondering if anyone knows if this affects the Sunsynk inverter too, more so the 5Kw... anybody??

Edited February 18, 20223 yr by Moffat

On 2022/02/17 at 12:26 PM, drsamuel said:

Just had a similar issue. LBCO at 20%, Battery at 19%

PV would not charge the battery and grid was not available.

Had to take it up with Deye and they  have done an update.

Waiting to test it out

20% is a very high setting form low battery cutout. I run my batteries down to 20% overnight, but my LBCO is way lower ... 10 or possibly 5. Maybe (partially?) avoid the issue by setting lower cutout and restart values?

23 hours ago, Scubadude said:

20% is a very high setting form low battery cutout. I run my batteries down to 20% overnight, but my LBCO is way lower ... 10 or possibly 5. Maybe (partially?) avoid the issue by setting lower cutout and restart values?

Was originally at 15%.  battery went down to 11% and system only came back on on grid despite solar being available.

Problem was not the value.

It appears they finally pushed a new firmware to fix it - it did not work the first time they said it was fixed.

Mine (Deye 5kw) doesnt shutdown. As far as i can tell, power to the house goes down until the restart level is reached, then power to the house is restored. 

It could be that mine has a newer firmware installed already

Edited February 23, 20223 yr by GTP