Solar Panels For Homes

How do I connect batteries to create a battery bank?

I have 4 x 110ah 12v batteries with standard terminals.
How do I connect these together to create a 12v battery bank of 440ah?
Also any suggestions on what sort of connectors / bus bars i need?
I was going to speak to an electrician but thought I’d try here first.
Also when wiring is it best to connect positive to positive, negative to negative. I need to keep 12v not 24 as my charger, solar panel and inverter are all designed for 12v.
Thankyou

You are right , positive to positive then negative to negative keeps you on 12 volts. This is parallel connecting.
Use a wire diameter that is much the same as what you find on a car battery in a car.

OUR SOLAR PANEL BATTERY CHARGING SETUP

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