DEYE Charge and Float Voltages in Lead Acid Mode.

Deyedreamer · Nov 4, 2022

Hi all, I noticed on the DEYE 5KW Hybrid Inverter, the Float Voltage is set without the charge Voltage being available (Use Battery V Mode).
I assume the Charge Voltage and Float Voltage are the same with less current output on the Float mode.
Can someone with DEYE knowledge please advise if this is correct.
I dont see any other way of setting the Charge Voltage in (Use Battery V) mode.

Thanks for your advice.

Tanishq · Mar 27, 2023

There should be bulk and float voltage, set bulk voltage to be your charging voltage and float to be your resting voltage. Check battery manufacturer's guidelines for the voltages. If using lfp batteries set 3.5V per cell as bulk and 3.35-3.4V per cell as float.

Deyedreamer · Apr 22, 2023

Hi, there are no lithium settings that can be adjusted like the Lead Acid Mode settings. Once Lithium Mode is selected, it already has it own charging profile that cannot be adjusted. My Lithium batteries don't like the charge settings and give an alarm, so I cannot use Lithium mode.
I have asked DEYE if they can be adjusted but they just say the battery is not compatible. I dont see why the Lithium settings cant be adjusted when Lithium batteries dont all have the same charging profile.

houseofancients · Apr 22, 2023

Deyedreamer said:
Hi, there are no lithium settings that can be adjusted like the Lead Acid Mode settings. Once Lithium Mode is selected, it already has it own charging profile that cannot be adjusted. My Lithium batteries don't like the charge settings and give an alarm, so I cannot use Lithium mode.
I have asked DEYE if they can be adjusted but they just say the battery is not compatible. I dont see why the Lithium settings cant be adjusted when Lithium batteries dont all have the same charging profile.

if you set lithium mode, the inverter uses the values it is getting from your BMS.
if you need to change the settings, you should do that in your bms.

lithium mode can and should only be set if you have setup good communications between the bms and inverter

Deyedreamer · Apr 22, 2023

Hi thanks for your input.
The BMS manufacture states the BMS is only a static device and does not send values to Inverter via BMS.
I keep getting conflicting reports about this issue.
I believe the Inverter gets the values from the BMS but the manufacture thinks differently.
I cant seem to get anywhere with this one.
I have the BMS software but cant see where I can change the values.
The DEYE Inverter communicates Via CAN no problems to the BMS but I just cant change the values.
The Battery is a HRESYS Lithium battery 100 ah.
Any ideas on how I can change the values in the BMS.

Thanks again.

houseofancients · Apr 22, 2023

Deyedreamer said:
Hi thanks for your input.
The BMS manufacture states the BMS is only a static device and does not send values to Inverter via BMS.
I keep getting conflicting reports about this issue.
I believe the Inverter gets the values from the BMS but the manufacture thinks differently.
I cant seem to get anywhere with this one.
I have the BMS software but cant see where I can change the values.
The DEYE Inverter communicates Via CAN no problems to the BMS but I just cant change the values.
The Battery is a HRESYS Lithium battery 100 ah.
Any ideas on how I can change the values in the BMS.

Thanks again.

what the batt. manufactorer has probably done is lock away the settings page behind a password.

can you show the contents of you lithium tab ?
if indeed they are communicating, there should be some interest info there

Deyedreamer · Apr 22, 2023

You mean the tab on the inverter BMS settings.

Deyedreamer · Apr 22, 2023

BMS communication via CAN.
I need to adjust these settings.

houseofancients · Apr 22, 2023

ok, so you have proper comms setup, and your bms is telling the deye your charge and discharge parameters correctly..

what doesnt you battery like about those ?

Deyedreamer · Apr 22, 2023

The battery charge voltage should be 54 volts. Charge current should be 40 amps. Discharge current should be ok at 90 amps. The battery is only a 15 cell not 16 hence the lower charge parameter.

Deyedreamer · Apr 22, 2023

I forgot to mention, the batteries throw an overvoltage alarm when using lithium mode because of the high charge voltage.

houseofancients · Apr 22, 2023

Deyedreamer said:
The battery charge voltage should be 54 volts. Charge current should be 40 amps. Discharge current should be ok at 90 amps. The battery is only a 15 cell not 16 hence the lower charge parameter.

well , these are the parameters given by your battery/bms provider
if you want to change those, either you in the bms change them, or have your supplier change them for you.
the deye is simply listing to bms command for those.

not sure why you would want to change the charge and discharge amps though.
voltage maybe,
seems this bms is set to 16s , did it come with this battery ?

Deyedreamer · Apr 22, 2023

No the batteries were bought afterwards after confirming the Deye Inverter was compatible. The battery specs says charge voltage 54v and as I said the battery gives an over voltage alarm. Also the recommended charge current is 0.2C = 20 amps. Looks like I will have to use Lead acid mode as no one knows how to make the adjustments.

houseofancients · Apr 22, 2023

again, your batteries are communicating just fine.

you manufactorer should provide you with the password to change the parameters and set it up correctly

if using LA settings for your Deye you will only use a limited feature set of your deye, which makes absolutely no sense.

push your supplier to provide with a way to change the bms settings.

btw, cant believe they are making a 15s lifepo4 battery.
have you checked individual cell voltages and make sure it isnt a simple case of cells being out of balance due to a lazy battery supplier ?

Deyedreamer · Apr 22, 2023

I just noticed the cell voltage is adjustable via BMS software. It's currently 3.8 volts per cell X 15 =57 volts. I will adjust to 3.6 volts to get 54 volts and see if it changes. Not sure where to find the current limit settings. Thanks for all your help.

houseofancients · Apr 22, 2023

Deyedreamer said:
I just noticed the cell voltage is adjustable via BMS software. It's currently 3.8 volts per cell X 15 =57 volts. I will adjust to 3.6 volts to get 54 volts and see if it changes. Not sure where to find the current limit settings. Thanks for all your help.

dont forget to set the total voltage config correctly to 54v too..

Deyedreamer · Apr 22, 2023

It's asking for a password before it will update. At least I am getting somewhere now. I know the settings can be changed.
I dought the manufacturer will disclose the password.

houseofancients · Apr 22, 2023

Deyedreamer said:
It's asking for a password before it will update. At least I am getting somewhere now. I know the settings can be changed.
I dought the manufacturer will disclose the password.

well , they sold you something which will self destruct if left this way..
if they arent willing to give you the password, at minimum they should change these settings remotely

maybe you can tell by the tools what bms is used and do a internet/forum search.

Deyedreamer · Apr 22, 2023

I will discuss with them next and see what can be done. At least I know it can be done..

houseofancients · Apr 22, 2023

Deyedreamer said:
I will discuss with them next and see what can be done. At least I know it can be done..

you may try password 123456..
it is a common one used

DEYE Charge and Float Voltages in Lead Acid Mode.

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