Aid to disaster zones is more efficient when it has electricity for equipment, lighting, and communications. Diesel generators work, but they are heavy and require resupply. Solar can require a lot of room for sufficient power – unless you put the solar panels on a massive balloon and float it above the disaster area, tethered by its power cable. Minimum infrastructure and time to deploy. Decentralized power for 50 people, which is about what it takes for a small health facility and coordination effort.
“A Photovoltaic Balloon Could Bring Electricity To Disaster Zones” – Smithsonian
Pretending Not To Panic 