Cancer units in poorer countries lose treatment days, spoil drugs and damage machines during power cuts. Solar panels with batteries sized for the cancer unit would remove that failure point.
Voltage instability and outages shorten linac component life, interrupt fractions, spoil temperature-sensitive drugs, and halt slide processing. Hospital solar microgrids with battery storage are now cost-competitive with diesel in most of Africa and South Asia. Designing the microgrid specifically for the cancer unit's load profile, with the linac on a conditioned circuit, is a bounded engineering project with quick payback.
Every source this page cites, grouped by who published it. Grouping is read from the web address, not assigned by hand.
A source that has moved or gone is reported by the weekly link check. /audit/