Pylontech Batteries

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Stinsy
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Re: Pylontech Batteries

#31

Post by Stinsy »

My pack spends almost all its time at 49 point whatever, between 99-100% this jumps up as high as 53V.

The 28.4 value will be something not related.

Glad your pack is working better now it is balanced. it is worth repeating the exercise once a year to help use all the capacity and help with longevity of the pack.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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Joeboy
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Re: Pylontech Batteries

#32

Post by Joeboy »

Stinsy wrote: Sat Sep 25, 2021 4:35 pm My pack spends almost all its time at 49 point whatever, between 99-100% this jumps up as high as 53V.

The 28.4 value will be something not related.

Glad your pack is working better now it is balanced. it is worth repeating the exercise once a year to help use all the capacity and help with longevity of the pack.
Just checked, he is running a 24V system?
Regardless, worth finding out the max V for the battery as Victron gear can overcharge. Best to know.
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
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Stinsy
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Re: Pylontech Batteries

#33

Post by Stinsy »

Joeboy wrote: Sat Sep 25, 2021 4:37 pm
Stinsy wrote: Sat Sep 25, 2021 4:35 pm My pack spends almost all its time at 49 point whatever, between 99-100% this jumps up as high as 53V.

The 28.4 value will be something not related.

Glad your pack is working better now it is balanced. it is worth repeating the exercise once a year to help use all the capacity and help with longevity of the pack.
Just checked, he is running a 24V system?
Regardless, worth finding out the max V for the battery as Victron gear can overcharge. Best to know.
Ahh yes looked at the picture. UP2500 are 24V models. Very rare indeed in the UK!

@DavB275 if you halve my values they will apply to your situation...
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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Joeboy
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Re: Pylontech Batteries

#34

Post by Joeboy »

I'd not heard of them. Thought they were US3000's. :oops:
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
Tinbum
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Re: Pylontech Batteries

#35

Post by Tinbum »

53.2v is Pylontech voltage for 48v and Vicron limit this to 52.4v as they say its too high.

https://www.victronenergy.com/live/batt ... ch_phantom

'My system only charges the battery to 52.4V

When DVCC is enabled, the battery (via the CAN-bms) is responsible for the charge voltage. The Pylontech battery requests a charge voltage of 53.2V. We have however found that in practice this is too high.

The Pylontech battery has 15 cells in series, so 53.2V equates to 3.55V per cell. This is very highly charged and makes the system prone to go overvoltage.

It should also be noted that a LiFePO4 cell stores very little additional energy above 3.45V.

For this reason we opted to override the BMS and cap the voltage at 52.4V. This sacrifices almost none of the capacity and greatly improves the stability of the system'
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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Joeboy
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Re: Pylontech Batteries

#36

Post by Joeboy »

He needs to find out his max voltage as assuming eggs are eggs re the battery packs. Thats 26.2V max instead of 28.4V. :shock:

I'd even suggest limiting max SOC to 80% until he defines this?
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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Stinsy
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Re: Pylontech Batteries

#37

Post by Stinsy »

Joeboy wrote: Sat Sep 25, 2021 5:38 pm He needs to find out his max voltage as assuming eggs are eggs re the battery packs. Thats 26.2V max instead of 28.4V. :shock:
Some inverters have values you can set for a Lead-Acid battery pack, but the inverter will ignore those and use the values the BMS requests if connected to the coms of a Lithium pack.
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
Tinbum
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Re: Pylontech Batteries

#38

Post by Tinbum »

Yes, note it says that the 48v has 15 cells in series so I doubt the 24v will have 7.5 probably 8 which would mean the 28.4v is correct. ((53.2/15) x 8)

The CAN or RS485 should set the voltage that's providing its communicating ok.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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Joeboy
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Re: Pylontech Batteries

#39

Post by Joeboy »

Cool! :D
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
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Stinsy
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Re: Pylontech Batteries

#40

Post by Stinsy »

Tinbum wrote: Sat Sep 25, 2021 5:53 pm Yes, note it says that the 48v has 15 cells in series so I doubt the 24v will have 7.5 probably 8 which would mean the 28.4v is correct. ((53.2/15) x 8)

The CAN or RS485 should set the voltage that's providing its communicating ok.
Good work!

We got there in the end...
12x 340W JA Solar panels (4.08kWp)
3x 380W JA Solar panels (1.14kWp)
5x 2.4kWh Pylontech batteries (12kWh)
LuxPower inverter/charger

(Artist formally known as ******, well it should be obvious enough to those for whom such things are important.)
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