[Duncan]

Hi
Ignore John - he is into house systems where a few extra tons are not a problem and he seems to think that everybody should buy new all of the time - must have shares in battery manufacturers

A single Volt 2Kwhr module would probably give more range than your Leads - should cost somewhere around $400

 

[Duncan]

The Volt 2Kwhr module is 12S3P - but you are only worried about the 12S

As far as balancing is concerned the pack comes with individual balancing modules - but using them is too complex for me!

I use a "Batt Bridge" - an incredibly simple circuit that tells me if I am out of balance
http://www.evdl.org/pages/battbridge.html

And I do checks at the individual cell level with a Celllog8 - they are about $20 and they can be modified to plug straight into the BMS cables on the Volt modules

So far every cell (I'm using 84S 3P) has been within 0.014v - and I am kind of abusing them a touch!

I use mine between 3.5v and 4.05v - you do need the right voltage for the specific chemistry!

With my old Headway pack I needed to track Ah - in and out -
With the Volt cells battery voltage is a good measure of charge