Hi

 

I require help, trying to figure out which would be the best back to discharge voltage for my 3.5 KW Pylontech Battery, running on an Axpert inverter.

Should it be below the float and bulk charging voltages, or should it be above? Currently my float is at 52.3 and my bulk at 52.5, with the back to discharge at 53 (my float and pulk were previously at 53.1 and 53.2 respectively, but lowered it since it seemed to be overshooting.) should I put the back to discharge at 52.0?

 

On 2022/02/06 at 7:37 PM, ebrahim said:

Hi

 

I require help, trying to figure out which would be the best back to discharge voltage for my 3.5 KW Pylontech Battery, running on an Axpert inverter.

Should it be below the float and bulk charging voltages, or should it be above? Currently my float is at 52.3 and my bulk at 52.5, with the back to discharge at 53 (my float and pulk were previously at 53.1 and 53.2 respectively, but lowered it since it seemed to be overshooting.) should I put the back to discharge at 52.0?

 

If your bulk and float is set at 52.5 and 52.3V how will you reach a back to discharge level of 53V as it cannot be reached.

Normally one with use a lower voltage to stop discharging further and then a value above this point once charging has taken place to start discharging again.

Start with 50v and see what it does. Then when it goes back to grid check battery status. If enough capacity is still available you can lower it. I won't go below 49v

18 hours ago, Scorp007 said:

Normally one with use a lower voltage

For setting 12, back to utility, I assume you mean.

Quote

to stop discharging further and then a value above this point once charging has taken place to start discharging again.

Right, now for setting 13, back to battery.

The level for setting 13, as suggested by the above posts, is a bit of a matter of taste, as long as it's below the bulk/absorb voltage. The higher you set the back to battery voltage setting, the longer you stay in line mode, using utility power. That's good if you want to keep your battery as full as possible for frequent load shedding. But it's bad if you want to save money spent on utility energy.