It never never needs batteries and has never failed me.

For the inspection, do it twice a year to check batteries in smoke detectors (and CO detectors) and to change the filters on the furnace.

If you don't mind the chore, you can even park the RV without connecting utilities (solar + battery; filling clean water tank; emptying dirty water tank; etc.).I am not sure which option is more economical.

Tesla something...battery factory, Space X, Elon's new AirBnB project?

He says “Solar + Powerwall battery ensures that your home never loses power.”

If I were a large capital group I would get the full battery of all those inspections done, make a generous offer contingent upon those results, and then if bad results come back make the offer incrementally less generous.

All I want for now is security lights (whether or not they are timed or motion-sensor driven).Here's my understanding of the pros and cons of either:WIRED LIGHTS:lasts a long time (solid state)reliableexpensive (due to electric bill and electrician costs)consistentSOLAR LIGHTS:Cheap (low cost to purchase and free electricity + no electrician needed)batteries may not last long?

Your grocery store tenant gets a policy that excludes Assault and Battery. 

80% chance that the batteries are dead.  19% chance they just don’t know the code (send them the online manual) 1% chance it’s bad. buy a new one for $20. 

About 15 years ago, I met a retired CPA who gave a person he casually met his entire life's savings of $125,000 because the person he met said he had invented batteries that work with only water.