Who is inveted Unitrepted Power Supply?

The concept of the Uninterruptible Power Supply (UPS) was developed by various inventors over time, with significant contributions from individuals like John H. McDonald in the 1960s and other engineers who worked on early battery backup systems. The UPS technology has evolved significantly since then, incorporating advancements in battery and power management technology. Today, various companies produce UPS systems, but no single person is solely credited with its invention.