Actually running on battery will give the absolute best sound of any conditioner/regenerator. DC is much more stable. Even though it is converted to AC with an inverter. It does not matter. It is the best there is. Although there are some reasons it is impractical. Such as cannot run large loads cost effectively. The replacement batteries are quite expensive. Should be replaced every 3 years not 5. Figure the cost for a big system. However ab “online” UPS is much better than this and nothing new. It can power an entire data center 24/7. It is very expensive to maintain.
If your inverter is producing a mere 6.5% you’re doing better than most and thank goodness you have a Power Plant to reduce that and fill in the gaps.
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Look at this. They say much better than P10 and they make much larger ones and smaller ones as well. Although it is just a Double Conversion UPS as I had mentioned above. these are superior to anything. Of course these are much more than the Yeti but these are “the real deal”. This is a review of a 220V unit. the 120V units are the same thing. I will wait for someone from PSA to refute this here
http://purepoweraps.com/pdf/PurePower-Hi-Fi%20News.pdf 
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Speaking for myself not PS Audio (I was also doing so in previous posts on this thread) - I definitely liked the PurePower APS technical description and bought (an older model) years ago, but it’s no where near as useful as the P20. It did indeed help my system with a few low current draw units and replacing a few of it’s outlets with Oyaide helped as well and I still have it in my system (it’s need no maintenance for it’s bettery etc., but the display isn’t too reliable these days (I don’t care.)) But as was my experience with previous power filters and regenerators the APS was definitely worse than direct to the mains for my amps (at the time smaller versions of my current amps.) Now I’ve moved it’s loads to the P20 as well with a modicum of improvement (and move my video devices to the PurePower.) With the APS when pushing too much current (nothing like an amp) the fan would come on, it typically wasn’t to noisy, but it was noticeably noisier than the room background - I don’t know if the newer units have or need a fan, but double conversion isn’t very efficient they need to dump that heat somehow. I can’t compare it to a P10 having never owned one. The APS definitely needs a lot more capacitance for the outputs to lower the output impedance - batteries (especially lead acid) have a relatively high impedance. I’m reasonably sure this is why mine didn’t really work well with my amps.
[Edit: Resolved a few pronouns.]
Not only do you know the technical stuff you are also very honest.
My amps sound better in the wall than in the P20’s. I have no clue if that thing is better. It is not as easily obtainable either. It says the new ones are 92% efficient. They have fans and what not. I am not in the market for new power conditioning. I am satisfied with what I have. I was just wondering why the P20 had 34mv of noise on my meter and my new Torus unit had 1mv. The lowest the meter goes. I do not even know if one can hear that though. I imagine it creates some self noise or something. I have no idea. I am satisfied with both the P20’s, and the Torus in a much smaller system. Since the P20’s buzz here. I just came across this thing. I was interested in the technology behind it that’s all. Thank you
Yeti 1400 is a great choice especially when you can take it outdoors and charge it with solar panel.
The closest alternative to Yeti that I personally used is Jackery.
I guess you pay 177$ only for the power station, to get a solar panel you will give another 110-200$
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Many moons ago, had a Pink Triangle Decapo Dac which had a Battery Bank option for its day a serious piece of equipment with interchangeable filters - the battery option made a significant difference in sound and a lot of positive HIfi reviews - surprised others in the market did start to go down this path.
sad day when that piece died …
I don’t know exactly which inverter to use in the US … These are not numbers I can recognize from my 10kW system