Prepare to be shocked, this is Humpty Doo NT, sort of grown up ????
The gate controller is the left box, the battery (x 2 I think) is in the right hand box and I couldn’t tell you if they’re lithium or AGM.
I do know they’re those “motorcycle” sized battery’s.
The big cost here on 5 Acres is the cost of getting 240v to the gate, so the solar units have really taken off in recent years.