If the electric is cut off , I have to evict , first to preserve the property , second the smoke alarms are electric with battery back up , but they chirp when the electric is off so they will disable them .

They also stole the batteries out of all the smoke detectors.  

Each meter came with it's own Blu Tooth transmitter and 7 year battery.

Just installed all new smoke detectors and a CO2 detector with 10 year batteries and voice in the rentals.

What can I do to be more proactive here...backup battery in sump pump, generator, etc.?

To take a vacation and recharge the batteries once in a while.Alex

For pharmacies that go dark they are easily re-tenanted if location and demographics are strong.I have seen Chase banks, battery plus stores, dollar stores, etc. go in those for second generation tenants.Where I believe people get in trouble is buying low cap rates in what I call weak suburban to rural communities at low cap rates.

If potential tenants ask about water in the basement during showings for that house, we tell them all of that, and that it the sump pump dies, it will flood, and we provide one of those $10 battery operated water sensors next to the sump pump.

.) $400 assuming battery powered.22.) $500 (random guess)23.) $200 (random guess)24.) $500 for a wipe down, vacuum, and basic clean.

How long is your battery life?