Using battery power to go off the City's power grid

I am sorry that you cannot interpret measurements and determine how something is likely to sound @ricevs and/or if something will have no additional sound at all. Measurements can help you significantly with one, and completely with that other. That some audiophiles do not believe this does not make it true, it just makes those audiophiles wrong.

w.r.t. inverters, given every single piece of equipment will behave differently when exposed to a different harmonic / noise signature of an AC power source, the best that can be done is generalizations, and one of those is a well designed products will be immune to all but fairly bad AC power. Whether you accept that or not does not change that fact. Additional comments could be made, such as certain distortion characteristics could reduce AC hum on tube amps, or no/low global feedback amps may have issues with certain frequencies of distortion products.  Beyond that, any comments made in careful listening tests, i.e. switching between clean AC, wall, and "inverter" which would have to be made in such a way to reduce listener error, would be applicable only to the specific equipment connected and except in the most egregious cases, which would be readily evident in measurements, would not be at all transportable to other equipment and other connections of equipment.

"I'm so glad, I'm so glad, I'm glad, I'm glad, I'm glad."  Please sing along!

Choose your reality........you do it every second.  Do you want to be glad?  if so, choose it now......right now.  Do you want to be right?  Then choose it right now.

Would you rather be Loving or Right?  You choose.

Being right is blah, blah, blah (it's whats called a Blah life)......being loving is happiness, joy and sharing.

So much for expecting maturity.

If you have cancer go for the loving doctor .....

theaudioamp,

I'll accept your statement that inverters are basically switch mode power supplies. Still, any piece of electronics has a "sound."  Nobody understands what distortion measurements correlate with a particular sound.  Ricevs has a longstanding business as a modifier of electronics.  He has determined that different materials in wires have different sounds.  If you don't want to believe his claims, be aware that there are several of his customers I have known personally who vouch for his claims by being pleased with his mods.

Just because you may not find reliable measurements that explain sonic differences, understand that the educated ear is THE best measurement tool of all, in terms of sonic evaluation.  Technicians are still in the dark ages of understanding the human hearing mechanism.  

A good medical doctor such as myself accepts the claims of patients when they say that a certain drug causes side effects, even if there are no published academic studies confirming patient claims.  A bad doctor is one who denies the validity of patient claims just because there are no studies in prestigious medical journals.  Well, I've got news for you--a lot of journals contain false studies that are driven by medico-political agendas.  A sincere doctor often can't get his article published because it conflicts with the agenda and business interests of the prestigious journal.

Still, any piece of electronics has a "sound."  Nobody understands what distortion measurements correlate with a particular sound.

No, any piece of equipment does not have a sound. This is Philelore and is not true.

Ricevs has a longstanding business as a modifier of electronics.  He has determined that different materials in wires have different sounds.  If you don't want to believe his claims, be aware that there are several of his customers I have known personally who vouch for his claims by being pleased with his mods.

And I personally know lots of people who believe stuff that is absolutely not true, but that does not make them or the large amount of people who believe the same thing correct.

Technicians are still in the dark ages of understanding the human hearing mechanism. 

Technicians perhaps,  lots of other people not so much.

Just because you may not find reliable measurements that explain sonic differences, understand that the educated ear is THE best measurement tool of all, in terms of sonic evaluation.

The ear is many things. A good measurement tool it is not. It is a poor measurement tool and a pretty good detection tool. However, it is easily fooled, and hence you must help it along so that it does not make mistakes.  Going to the last statement you make, it is very easy to simulate all sorts of distortion, highly accurately, controllably, repeatably, and then see how people respond to it. Anyone can do it with just a bit of Google research and not a lot of time. It is why I am suspect of so many claims of distortion audibility (as are many people) because it would be easy to demonstrate and validate.

A sincere doctor often can't get his article published because it conflicts with the agenda and business interests of the prestigious journal.

Oh come one. Put together the study, do quality research, repeatable study. You may not get into one of the more prestigious journals but there are so many that are desperate for content anyone can get almost anything published.  A good medical doctor will listen, but they will also try to understand enough about the drug to know whether the claimed side effect is remotely possible because not all side effects will be possible. If they believe blindly that the drug is causing the side effect the patient claims, they could very well miss the real underlying cause of what they are experiencing.