Be careful if you turn it off with a batch in the sak made. It will cool down to room temp. and take quite awhile to heat up again to a comfortable temp. for dialysis.
You sir are a fountain of information. I did a tx this AM about 30 minutes after turning the system on (was off for 12+ hours) and was quite comfortable, not cold or anything. Surprising. But then, it was the second tx from the batch so there was less to heat up.
AS to generators - Bill Peckham used a generator on his rafting trip - might want to check how big it was (as I assume it was a relatively small portable)