Part 8/16:
The core of Leedskalnin's engineering innovation appears to be a self-sufficient electrical grid powered by a bank of approximately twenty car batteries connected in parallel across the site. These batteries powered various tools, lighting the entire site—including headlamps for night work—and operated the massive reciprocating engine.
This arrangement allowed the batteries to be recharged efficiently via a single generator, which is still located at the site. This setup made possible continuous night-time work in the heat of Florida and reduced dependence on external power sources.