PtownRanger
Posts: 2
Joined: Mon Oct 31, 2016 8:49 pm
Delivery Date: 01 Nov 2017

Re: Use of Nissan Leaf battery in Solar installation.

Thu Dec 29, 2016 5:50 pm

Can someone please provide a schematic of the whole system especially showing how the BMS is wired? I'm technical but not quite to the level that I can decipher the posts and put it together.

offpist
Posts: 33
Joined: Sun Mar 16, 2014 4:26 am
Delivery Date: 23 Apr 1978

Re: Use of Nissan Leaf battery in Solar installation.

Fri Dec 30, 2016 5:49 am

Start by reading the manual for the BMS.

http://www.rec-bms.com/BMSSMA.html

PtownRanger
Posts: 2
Joined: Mon Oct 31, 2016 8:49 pm
Delivery Date: 01 Nov 2017

Re: Use of Nissan Leaf battery in Solar installation.

Fri Dec 30, 2016 1:48 pm

I have, thanks. What I would specifically like to know is that if you have a pack of 7 modules and each module has 2 cells for a total of 14 cells for the pack does that mean that you use one BMS for the pack? In your case, when you've used 6 packs initially does that mean you used 6 BMS? Thanks in advance.

offpist
Posts: 33
Joined: Sun Mar 16, 2014 4:26 am
Delivery Date: 23 Apr 1978

Re: Use of Nissan Leaf battery in Solar installation.

Sat Dec 31, 2016 11:33 am

Correct. 7 modules=14 cells on series.
Only one BMS needed.

You can put as many cells in parallell as you like.

NiallDarwin
Posts: 33
Joined: Thu Jul 09, 2015 1:58 am
Delivery Date: 12 Dec 2015
Leaf Number: 004321
Location: New Zealand

Re: Use of Nissan Leaf battery in Solar installation.

Sat Mar 11, 2017 2:07 am

Hi offpist, thanks for sharing this awesome work.

I am currently off-grid using Outback charge controller and Inverter and an ancient 460Ah 48V Lead acid battery bank. These old batteries are a real worry.

Having swapped my 2011 Leaf's battery for a newer one http://www.mynissanleaf.com/viewtopic.php?f=51&t=21997&start=120 my plan is now to make a similar storage system to yours with the old pack. I will try not to ask too many stupid questions. Before I begin I want to know if you are still happy with your design or if there are some things you'd change, especially now that there are 2 year's worth of developments since your first build?

Thanks,
Niall

offpist
Posts: 33
Joined: Sun Mar 16, 2014 4:26 am
Delivery Date: 23 Apr 1978

Re: Use of Nissan Leaf battery in Solar installation.

Sat Mar 11, 2017 5:42 am

As far as i know there is no recommended design changes.
Good luck on your project ;)

vladi
Posts: 1
Joined: Mon Mar 13, 2017 10:08 am
Delivery Date: 13 Mar 2017

Re: Use of Nissan Leaf battery in Solar installation.

Mon Mar 13, 2017 3:20 pm

Hello, nice project, i would like to do the same but i would like to ask you your experience with the battery pack, how many cicles did you do? do you see some changes after the time? how much charge discharge the package?
thanks in advance.

zevpilot
Posts: 3
Joined: Mon Oct 02, 2017 6:24 am
Delivery Date: 04 Apr 2016

Re: Use of Nissan Leaf battery in Solar installation.

Tue Aug 28, 2018 7:43 am

Hi offpist

Could you please send copies of the photos originally linked to this first post?

I have a 2015 Gen 3 leaf battery and I'm planning on using sunny boy's as inverters. I need to learn more first.

Regards

Barry

offpist wrote:Hello everybody.
I currently drive an Nissan Leaf, and I am also very interested in Solar systems.
So I started thinking an battery from Nissan Leaf would make a good storage for solar power I normally export to the grid.

So, I got a hold of a battery pack from an wrecked Leaf, and started building.
First of all i had to make it about 48V, and to do that i have to put 14 Cells in series.
Each module has two cells, so its only 7 modules in series and 6 in paralell.
Then I can use 42 of the 48 modules from the battery pack.
This may be expanded with more modules later, we will see.

For battery management i am using this unit:
http://www.rec-bms.com/BMS9R.html" onclick="window.open(this.href);return false;

BMS.
Image

Fuse, contactor and pre-charge unit.
Image

Some of the connections.
Image

Shunt.
Image

LCD panel.
Image

Comming together.
Image

From the back.
Image

Thermostatic controlled fans on top.
Image

4 pcs M10 bolts on each bank.
Image

User avatar
Marktm
Gold Member
Posts: 419
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737
Location: Houston, TX

Re: Use of Nissan Leaf battery in Solar installation.

Wed Aug 29, 2018 4:48 pm

zevpilot wrote:
I have a 2015 Gen 3 leaf battery and I'm planning on using sunny boy's as inverters. I need to learn more first.

Regards

Barry



Not sure of your ultimate goals/use, however have you considered using the Leaf's battery pack as is at the ~400 VDC level with a APC/Schneider UPS inverter that operates at the same voltage range with a center tap of +/- 200 VDC? The emergency disconnect of the Leaf's battery provides the connections required. Of course this would be off-grid only with careful consideration given to the VA/watts limitations of the UPS's under continuous load (must derate). Not sure of the viability of this option, but a consideration.
2012 Leaf SL; 36,000 miles. Battery replaced November 1st, 2016.

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