Depending on the amount of time it shuts out, you could use a battery back up for a PC. For a 400w pc tower, and the monitor mine will stay up and running for 15 min, 10 if I try to print 2 documents (dammit!) .
Check your grows power draw and pickup a backup battery that will operate it all for 10-15 min, or have just the fan on battery backup. Odor escaping would concern me more then hermies, in an apartment
