[Ivansgarage]

Why not look for battery packs from wrecked hybrid cars there is shit
loads of them on ebay.

https://www.ebay.com/sch/i.html?_fr...&_nkw=Kia+Optima+Hybrid+Battery+Pack&_sacat=0

These Kia Optima packs have 9 30volt batts in a pack. Price about 300 bucks on ebay.
A little cutting on a band saw or saws all and can retain all the mountings. I have four packs
in my truck right now will put four more packs in the back box.

 

[Killzilla]

Kinda wanna use new batteries that can be bought again and again. And for a 48V system, around 60 - 100 Ah preferably.

 

[pdove]

I have always had a good experience dealing with this company. They have many options.

http://www.electriccarpartscompany.com/

 

[Karter2]

Kinda wanna use new batteries that can be bought again and again. .........

Lead is perfect for that....why change