Idiot's guide to a self build battery

Tinbum
Posts: 1112
Joined: Mon May 31, 2021 9:55 pm

Re: Idiot's guide to a self build battery

#621

Post by Tinbum »

nowty wrote: Tue Feb 14, 2023 6:43 pm
Additional Solar and Batteries. :shock:
Tinbum demonstrates his new system to the DNO............, :lol:
[/quote]

:D :D I'm keeping it totally off grid. If it needs a Grid charge, in the winter then this will be done using 48v chargers.
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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Stinsy
Posts: 2754
Joined: Wed Jun 02, 2021 1:09 pm

Re: Idiot's guide to a self build battery

#622

Post by Stinsy »

MrPablo wrote: Tue Feb 14, 2023 6:41 pm Question for the group seeing as there's many smarter people than I here...
I currently have one of the Frankenstein style fuse disconnects between my pylontech stack and the inverter, and I'm planning to retain that for the DIY stack.
The question is, do I need a separate disconnect for the battery pack itself, similar to the disconnect Nowty had previously shown?
Up to you.

For my money you only need one disconnect to isolate the inverter for maintenance and to provide overcurrent protection in case a of fault within the inverter.
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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nowty
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Joined: Mon May 31, 2021 2:36 pm
Location: South Coast

Re: Idiot's guide to a self build battery

#623

Post by nowty »

Stinsy wrote: Tue Feb 14, 2023 7:51 pm
MrPablo wrote: Tue Feb 14, 2023 6:41 pm Question for the group seeing as there's many smarter people than I here...
I currently have one of the Frankenstein style fuse disconnects between my pylontech stack and the inverter, and I'm planning to retain that for the DIY stack.
The question is, do I need a separate disconnect for the battery pack itself, similar to the disconnect Nowty had previously shown?
Up to you.

For my money you only need one disconnect to isolate the inverter for maintenance and to provide overcurrent protection in case a of fault within the inverter.
I agree that only one isolator is required, but each DIY battery string should have its own series fuse.

My system is so large that I have 3 battery banks, each one has an isolator and fuse. But two of the battery banks have 5 parallel battery strings each, no isolator but each string has its own series fuse.

Below shows two battery banks of 5 strings each, one isolator for each bank.
Image


Each battery string has a series fuse.
Image


NOTE - All the smaller blue fuses on top are intercell connectors to help keep the cells balanced.
16.9kW PV > 109MWh generated
Ripple 6.6kW Wind + 4.5kW PV > 25MWh generated
5 Other RE Coop's
105kWh EV storage
60kWh Home battery storage
40kWh Thermal storage
GSHP + A2A HP's
Rain water use > 510 m3
MrPablo
Posts: 273
Joined: Mon Oct 17, 2022 1:26 pm

Re: Idiot's guide to a self build battery

#624

Post by MrPablo »

Good stuff, thanks for the feedback Stinsy, Nowty. One less thing to sort out at this stage then.
10x 405W JA Solar panels (4.05kWp) @ 5 degrees
3x 405W Longi panels (1.22kWp) @ 90 degrees
16.5kWh DIY LifePo4 battery
Solis inverter/charger
0.6kW Ripple WT
64kWh Kia E-Niro
Tinbum
Posts: 1112
Joined: Mon May 31, 2021 9:55 pm

Re: Idiot's guide to a self build battery

#625

Post by Tinbum »

Just received a photo of my order prior to shipping and a testing video. :D :D

Image
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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Colin Deng
Posts: 199
Joined: Mon Nov 21, 2022 8:33 am

Re: Idiot's guide to a self build battery

#626

Post by Colin Deng »

Tinbum wrote: Wed Feb 15, 2023 2:15 pm Just received a photo of my order prior to shipping and a testing video. :D :D

Image
Thank you for the support
The cells are too many , so we can just pick up 32pcs for testing now
Will send the testing doc tomorrow with the tracking number for you

Many thanks
Colin
Colin Deng(Batterycolin)
Battery supplier for battery cells and pack
Email:guohed070@gmail.com
https://www.linkedin.com/in/colin-deng-2b4277238/
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Fintray
Posts: 1524
Joined: Mon May 31, 2021 6:37 pm
Location: Aberdeenshire

Re: Idiot's guide to a self build battery

#627

Post by Fintray »

Tinbum wrote: Wed Feb 15, 2023 2:15 pm Just received a photo of my order prior to shipping and a testing video. :D :D

Image
Wow how many are in there? :o
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
Tinbum
Posts: 1112
Joined: Mon May 31, 2021 9:55 pm

Re: Idiot's guide to a self build battery

#628

Post by Tinbum »

Fintray wrote: Wed Feb 15, 2023 2:35 pm
Tinbum wrote: Wed Feb 15, 2023 2:15 pm Just received a photo of my order prior to shipping and a testing video. :D :D

Image
Wow how many are in there? :o
64
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
Caesium
Posts: 218
Joined: Mon Sep 06, 2021 9:01 pm
Location: Brighton

Re: Idiot's guide to a self build battery

#629

Post by Caesium »

4 per box, 16 boxes.. nice :)

How much are these cells, if they come with the grade A test reports?
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Fintray
Posts: 1524
Joined: Mon May 31, 2021 6:37 pm
Location: Aberdeenshire

Re: Idiot's guide to a self build battery

#630

Post by Fintray »

Tinbum wrote: Wed Feb 15, 2023 2:36 pm
Fintray wrote: Wed Feb 15, 2023 2:35 pm
Tinbum wrote: Wed Feb 15, 2023 2:15 pm Just received a photo of my order prior to shipping and a testing video. :D :D

Image
Wow how many are in there? :o
64
Thanks. :)
3.87kWp PV
10.24kWp PV SolarEdge system
Tesla Powerwall 2
100 x 47mm Navitron tubes (still being installed!) Now likely to be removed for more PV.
MK2 PV router DHW diverter
Morso 5kW WBS
Vaillant AroTherm 10kW ASHP
Nissan Leaf
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