Question about which batteries for parallel

[howieb]

I have two older (2021) Renogy 12V 100Ah batteries that I have used in parallel. I want to add two more 12V 100Ah batteries to the bank. I am unsure whether to buy two LiTime Group 24 (about the same size), or the Renogy mini core (which is a different physical size but cheaper this week) . Which would be the most similar to the olser renogy?

I am new enough to seek some help on this.

Howie

 

[Mike8061]

If in parallel and same chemistry just pick what fits or the better price. In parallel all will see the same voltage.

If you have not looked it up before, there are ways to wire them in parallel to avoid cable resistance from affecting the pack as much.

Victron wiring guide has them.

 

[howieb]

Thank you. I have checked out wiring info and decided to go with a busbar setup with each battery positive going to a busbar with same size and gauge cables, and the same for the negative, since i am changing from two batteries similar aged batteries to four unevenly aged ones.