I seem to remember Victron recommending 52.4V for Pylontechs. Even though the BMS requests higher.nowty wrote: ↑Sat Nov 19, 2022 1:05 pmSo as well as the new "C" versions being 0.5V lower max charging spec when compared with older versions, they want another 0.3V below their own lower spec when using manual control.
Mine are still ok as I charge to 56.4V but need to subtract my extra cell, so its 56.4V - 3.5V = 52.9V.
But its something for others with parallel packs to watch out for, the max charge voltage should be 53.2V and not 53.5V as it says in the general spec. I certainly was not aware of that.![]()
Idiot's guide to a self build battery
Re: Idiot's guide to a self build battery
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.)
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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Re: Idiot's guide to a self build battery
That fits with the data that the ME3000SP spits out, which is just the data it receives from the Pylontechs. It's rare to see the voltage get above 53.0V, . Our pack hit 100% in the sunshine yesterday and the voltage reported was 53.0V at the instant the pack hit 100% and was still charging, but that quickly dropped back to about 52.0V as soon as the battery stopped charging, when the house was running off PV, so the batteries were neither charging or discharging.
53.0V is 3.53V per cell, so comfortably under the 3.65V per cell maximum, so my guess is that Pylontech have chosen to limit the full charge voltage a fair bit in order to improve the cell life, perhaps. Makes sense, as even a small decrease in the cell usable capacity range seems to give a large improvement in cycle life. I remember that someone did some independent testing on Headway cells in the early days and found that restricting the maximum charge by just 5% gave something like a fivefold improvement in cycle life.
25 off 250W Perlight solar panels, installed 2014, with a 6kW PowerOne inverter, about 6,000kWh/year generated
6 off Pylontech US3000C batteries, with a Sofar ME3000SP inverter
6 off Pylontech US3000C batteries, with a Sofar ME3000SP inverter
Re: Idiot's guide to a self build battery
Yes they do. I intercept the CAN messages and set my max voltage to 52.5v but then once a week it sets it to the pylon recommendation of 53.2v. (This way I think, if i ever have a warranty problem, pylon can't say that the batteries haven't been charged to the BMS setting).
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
- Colin Deng
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- Joined: Mon Nov 21, 2022 8:33 am
Re: Idiot's guide to a self build battery
Thank you so much! JoeJoeboy wrote: ↑Fri Nov 11, 2022 10:38 pm This is Colin's direct email for quotes.
colin@deriytech.com
Good to know that we can help you with the battery needs
Colin Deng(Batterycolin)
Battery supplier for battery cells and pack
Email:guohed070@gmail.com
https://www.linkedin.com/in/colin-deng-2b4277238/
Battery supplier for battery cells and pack
Email:guohed070@gmail.com
https://www.linkedin.com/in/colin-deng-2b4277238/
Re: Idiot's guide to a self build battery
You are very welcome Colin, enjoy the forum!Colin Deng wrote: ↑Tue Nov 22, 2022 2:08 amThank you so much! JoeJoeboy wrote: ↑Fri Nov 11, 2022 10:38 pm This is Colin's direct email for quotes.
colin@deriytech.com
Good to know that we can help you with the battery needs
![VeryHappy :)](./images/smilies/Extremely-Happy.gif)
19.2kW 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
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
- Colin Deng
- Posts: 190
- Joined: Mon Nov 21, 2022 8:33 am
Re: Idiot's guide to a self build battery
Thank you so much JoeJoeboy wrote: ↑Tue Nov 22, 2022 9:26 amYou are very welcome Colin, enjoy the forum!Colin Deng wrote: ↑Tue Nov 22, 2022 2:08 amThank you so much! JoeJoeboy wrote: ↑Fri Nov 11, 2022 10:38 pm This is Colin's direct email for quotes.
colin@deriytech.com
Good to know that we can help you with the battery needs![]()
Still learning how to post or reply on the forum
Colin Deng(Batterycolin)
Battery supplier for battery cells and pack
Email:guohed070@gmail.com
https://www.linkedin.com/in/colin-deng-2b4277238/
Battery supplier for battery cells and pack
Email:guohed070@gmail.com
https://www.linkedin.com/in/colin-deng-2b4277238/
Re: Idiot's guide to a self build battery
I hope you enjoy the space. We do not allow advertising as a rule so refrain from that and its all good. A lot of people over here have worries about such large investment at such a distance. There are also sharks in the waters. Very glad to have found you and I hope your company has contacts through the forum. Cheers.Colin Deng wrote: ↑Tue Nov 22, 2022 1:07 pmThank you so much JoeJoeboy wrote: ↑Tue Nov 22, 2022 9:26 amYou are very welcome Colin, enjoy the forum!Colin Deng wrote: ↑Tue Nov 22, 2022 2:08 am
Thank you so much! Joe
Good to know that we can help you with the battery needs![]()
Still learning how to post or reply on the forum
19.2kW 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
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
- Colin Deng
- Posts: 190
- Joined: Mon Nov 21, 2022 8:33 am
Re: Idiot's guide to a self build battery
Thanks JoeJoeboy wrote: ↑Tue Nov 22, 2022 1:13 pmI hope you enjoy the space. We do not allow advertising as a rule so refrain from that and its all good. A lot of people over here have worries about such large investment at such a distance. There are also sharks in the waters. Very glad to have found you and I hope your company has contacts through the forum. Cheers.Colin Deng wrote: ↑Tue Nov 22, 2022 1:07 pmThank you so much Joe
Still learning how to post or reply on the forum
I will not put on the advertising here
We will keep up the good work
It will be learn much morn from this forum
If it ok to ask for opinion here from time to time ?
So can learn more about how the customer will fell
But i will not advertising here !!
Thanks
Re: Idiot's guide to a self build battery
Of course you can. No worries.Colin Deng wrote: ↑Tue Nov 22, 2022 1:26 pmThanks JoeJoeboy wrote: ↑Tue Nov 22, 2022 1:13 pmI hope you enjoy the space. We do not allow advertising as a rule so refrain from that and its all good. A lot of people over here have worries about such large investment at such a distance. There are also sharks in the waters. Very glad to have found you and I hope your company has contacts through the forum. Cheers.Colin Deng wrote: ↑Tue Nov 22, 2022 1:07 pm
Thank you so much Joe
Still learning how to post or reply on the forum
I will not put on the advertising here
We will keep up the good work
It will be learn much morn from this forum
If it ok to ask for opinion here from time to time ?
So can learn more about how the customer will fell
But i will not advertising here !!
Thanks
19.2kW 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
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
Re: Idiot's guide to a self build battery
Yes I'm tempted to buy some, probably 4 sets of 16, but am vary wary.
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