Idiot's guide to a self build battery

[Tinbum]

Additional Solar and Batteries.
Tinbum demonstrates his new system to the DNO............,
[/quote]

I'm keeping it totally off grid. If it needs a Grid charge, in the winter then this will be done using 48v chargers.

[Stinsy]

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.

[nowty]

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.



Each battery string has a series fuse.



NOTE - All the smaller blue fuses on top are intercell connectors to help keep the cells balanced.

[MrPablo]

Good stuff, thanks for the feedback Stinsy, Nowty. One less thing to sort out at this stage then.

[Tinbum]

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

[Colin Deng]

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

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

[Fintray]

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

Wow how many are in there?

[Tinbum]

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

Wow how many are in there?

64

[Caesium]

4 per box, 16 boxes.. nice

How much are these cells, if they come with the grade A test reports?

[Fintray]

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

Wow how many are in there?

64

Thanks.