Originally Posted by
downunderdan
You are focusing on the wrong problem.
She needs a personal emergency response system (PERS) aka medical monitoring. Pendant etc. which would allow her to call for help in case of accident and also monitors AC failure. The monitoring centre could prioritise this signal (AC fails are typically not urgent) due to the life-support equipment.
We do this for a number of customers for whom electrical outage represents a possible threat to life.
What you are proposing seems like a great hack, and whilst I love a good hack as much as the next guy they aren't appropriate to life-safety systems.
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