Hi 

Please help.

Setup:

Deye 5kw Inverter

Dyness 5.12kw Battery

 

Attached I have my System Work Mode 2 settings, and my history from last night.

 

Problem

Note that my SWM2 setting from 18H00 to 20H30 says Grid Charge and battery to be 80%

My hisrory shows that the battery reached 80% at 20H05 and started charging, but it did not stop at 20H30. It continued until 03H05(7 hours later)

 

Is there some other setting, or why could it be wrong?

Any help PLEASE

 

have you double checked the work settings on the inverter itself (not the app) ?

13 minutes ago, madness_za said:

have you double checked the work settings on the inverter itself (not the app) ?

I have

 

Set your 'Time 1' to start at midninght (00:00) and your last time to end at midnight.

I've seen similar behaviour to you on my SunSynk 5kW (which is almost exactly the same hardware as yours - same OEM) when not starting/ending the times on midnight. Presumably something that needs to be addressed in firmware.

 

25 minutes ago, JayMardern said:

Set your 'Time 1' to start at midninght (00:00) and your last time to end at midnight.

I've seen similar behaviour to you on my SunSynk 5kW (which is almost exactly the same hardware as yours - same OEM) when not starting/ending the times on midnight. Presumably something that needs to be addressed in firmware.

 

Thanks. I will test

2 hours ago, The Eagle said:

 

Note that my SWM2 setting from 18H00 to 20H30 says Grid Charge and battery to be 80%

My hisrory shows that the battery reached 80% at 20H05 and started charging, but it did not stop at 20H30. It continued until 03H05(7 hours later)

I see your setting saying charge battery at 15:00 until 18:00 in your time slots and looking at the history, it never charged, it stopped discharging at 20:05 until 03:05 and thus ran from the grid, but the power used from the grid did not go to the battery, since the 3d last column, never shows any charging and the SOC% does not really change between 20:05 and 03:05...

Edited November 10, 20232 yr by Kalahari Meerkat

7 minutes ago, Kalahari Meerkat said:

I see your setting saying charge battery at 15:00 until 18:00 in your time slots and looking at the history, it never charged, it stopped discharging at 20:05 until 03:05 and thus ran from the grid, but the power used from the grid did not go to the battery, since the 3d last column, never shows any charging and the SOC% does not really change between 20:05 and 03:05...

 

The Time Of Use settings in the screenshot seem to indicate:

• 'Allow discharge down to 80%' from 18:00 to 20:30 (last row); then
• 'Allow discharge down to 65%' from 20:30 to 04:00 (first row)

And based on the spreadsheet, the SOC did not seem to follow the latter; by 04:00 it should have been well below 80% - and instead it only seems to have adhered to the next timeslot (discharge from 04:00 down to 60%). That discharge should've been actioned from 20:30.

This is the exact behavior I've seen when first/last time-slots aren't started/ended at midnight - where the last row (and sometimes the first) then doesn't get adhered to...

 

To see a more graphical representation, go to 'Overview' and select the different parameters you want to evaluate.  

Thanks all.

I managed to get it fixed by starting from 00:00:00 in slot 1.

3 hours ago, The Eagle said:

Thanks all.

I managed to get it fixed by starting from 00:00:00 in slot 1.

 

Brilliant, for anyone in future who stumbles on this thread - this affects both Deye and SunSynk models - and both first and last row must be updated to resolve it,

 

On 2023/11/10 at 10:41 AM, JayMardern said:

Set your 'Time 1' to start at midninght (00:00) and your last time to end at midnight.

I've seen similar behaviour to you on my SunSynk 5kW (which is almost exactly the same hardware as yours - same OEM) when not starting/ending the times on midnight. Presumably something that needs to be addressed in firmware.

 

 

Is it posble to limit Deye battery SOC level? I have this setup, but battery keeps charging to 100%.

9 hours ago, pimpackukas said:

Is it posble to limit Deye battery SOC level? I have this setup, but battery keeps charging to 100%.

When? off solar? I don't think you can limit the solar charge to battery when excess solar is available... if your battery is LiFePO4 chemistry, then you should not worry too much, if you are using Cobalt base NMC Lithium or NCA Lithium, then the only suggestion I'd have is to set the battery to user defined and lower the Voltages and thus the SOC % level...

Edited March 29, 20251 yr by Kalahari Meerkat
fat fingers

1 hour ago, Kalahari Meerkat said:

When? off solar? I don't think you can limit the solar charge to battery when excess solar is available... if your battery is LiFePO4 chemistry, then you should not worry too much, if you are using Cobalt base NMC Lithium or NCA Lithium, then the only suggestion I'd have is to set the battery to user defined and lower the Voltages and thus the SOC % level...

Yes, from solar. The battery is LiFePO4 Deye 4*5,1 kWh. I use only 30% of battery over night, so I thought it would be wise to keep the SOC at 35-80 % range. Right now I have limited charging power to 20A, but this solution is not good for cloudy days.

Edited March 29, 20251 yr by pimpackukas
msitypes

3 hours ago, pimpackukas said:

Yes, from solar. The battery is LiFePO4 Deye 4*5,1 kWh. I use only 30% of battery over night, so I thought it would be wise to keep the SOC at 35-80 % range. Right now I have limited charging power to 20A, but this solution is not good for cloudy days.

Since its LiFePO4, I'd say don't worry, but if you *really* want a lower SOC and treat the battery with kid gloves, then don't use inverter to batttery comms, set up the battery as user defined and since I'm guessing its a 16S battery, let's then set the bulk and absorbption Voltages to 3.45V, instead of the presumably 3.6V per cell. Thus 16 X 3.45V for bulk and absorption, which is 55.2V this will not quite get you to the 80% you're looking for, with LiFePO4's, I think it may be next to impossible to get there, unless you have a BMS which does coulomb counting and will let you, based on this count, limit the charge into the cells...

Edited March 29, 20251 yr by Kalahari Meerkat

set the bulk and absorbption Voltages to 3.45V, instead of the presumably 3.6V per cell. Thus 16 X 3.45V for bulk and absorption, which is 55.2V this will not quite get you to the 80% you're looking for, with LiFePO4's, I think it may be next to impossible to get there, unless you have a BMS which does coulomb counting and will let you, based on this count, limit the charge into the cells...

3.45V will still get you to 100% it will just take longer. The problem is balancing might not take place depending on the BMS fitted.

Right now I read: BMS Battery Voltage：54.00 V , BMS SOC 87%. Probably 100% would be not so "Full"... Will check.

Edit: from the Deye Cloud records:
BMS charging voltage: 58.4 V
Battery voltage during charging :

60% 54.2V 50A

80% 54.5V 48A

90% 54.6V 47A

97% 55.0V 47A

99% 54.6V 24A

99% 53.7V 0A

During all charges maximum voltage at 99% was 56.3V;

At 100% it stay at 53.9 - 53.4 V.

Info in the Battery manual:
Nominal Voltage (V) 51.2 Operating Voltage(V) 43.2~57.6

4 hours ago, Kalahari Meerkat said:

Since its LiFePO4, I'd say don't worry, but if you *really* want a lower SOC and treat the battery with kid gloves, then don't use inverter to batttery comms, set up the battery as user defined and since I'm guessing its a 16S battery, let's then set the bulk and absorbption Voltages to 3.45V, instead of the presumably 3.6V per cell. Thus 16 X 3.45V for bulk and absorption, which is 55.2V this will not quite get you to the 80% you're looking for, with LiFePO4's, I think it may be next to impossible to get there, unless you have a BMS which does coulomb counting and will let you, based on this count, limit the charge into the cells...

Edited March 29, 20251 yr by pimpackukas