“access to reliable power is the weak link of comms”
Absolutely. Gasoline or propane goes away. Solar will last 10 years or so with a fresh off-grid system and batteries. The panels themselves will run for 20+ years but you’ll need to have prepared in advance with DC-DC converters to run electrics during the day only. Systems that are tied to the grid now will be useless. Even the panels have the wrong voltage for use unless the recipient has really expensive and programmable charge controller.