Says right in the article that you can recharge it with ice instead of electricity.
Instead use an https://en.wikipedia.org/wiki/Absorption_refrigeration and deliver fuel - it will be much much lighter for the runtime.
Rural places still use commercial units based on this method - you heat part of the fridge in the fire in the morning while cooking breakfast and it will keep it cold the rest of the day.
It can also be recharged if the power comes on for a short while.
Storing cold is valuable though, but delivering ice is not.
2. Enough ice for transport doesn't mean enough ice for longer-term storage.