4x12V LeadAcid Batteries => 24V

[wummi]

Hello there!
So I wired 4 brand new gel batteries to be 24V for my RV / Solar.

The question is: Should I also wire "across"? (see diagram)

My general electronics sense tells me: doesn't matter, because 2x12V in series is really just 20 Lead acid cells in series.
But as the real world isn't optimal, would it be a better/worse idea to also connect the middle tap?

Thank you, everyone!

[Terry Bites]

Option 2 is better, it 2 balances the terminal voltages, option 1 is a bit more random. www.impactbattery.com/blog/post/how-to-charge-marine-and-rv-batteries-in-parallel

[wummi]

TBH this article is suspicious at best.

In his mentioned setup, he's dropping 10% of his 600W load across his parallel battery connections. This would indicate to me that his battery connections are horribly under-dimensioned and/or have extremely high resistance.

[connectTek]

.