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

I have the Bluetti AC300 with two B300 batteries.  For my system, I'll echo what others have said here:  a noticeable step up in sonic quality, most notably a blacker background.

I connected the Bluetti stack to 6 of my home circuits using a transfer switch (30amp connection from AC300 to transfer switch).  The transfer switch is wired to 6 individual 20 amp circuits in my main panel.  

I have one of those GreenWave EMI mains noise analyzers. A few measurements:

• grid AC:  350mV  (in the winter it's around 225).   
• 120v outlet on AC300 - fan off:  "--" 
• 120v outlet on AC300 - fan on:  "--"
• wall outlet that powers my system (powered by Bluetti):  "--"

I'm guessing that "--" on the noise analyzer means less than 1.  This Greenwave tool makes noise when you plug them in, and while measuring Bluetti power it's almost inaudible.

 I realize these cheap "noise" tools only measure a certain spectrum, but there is something measurably different with the Bluetti.  Subjectively, I hear a difference - especially now in the summertime.

I can run the stereo for about 4 hours before the fan comes on, but even with it on, I hear no difference in sound.  The bluetti is in the garage near the panel, so I don't hear the fan itself while in my house.

FWIW, I use Puritan PSM156 power conditioner as well.  I live in Florida, so power outages are common.  I'm really happy with the multi use of this house battery backup solution.  I'm putting a few solar panels on the roof this weekend.

@veroguy - Great post. I certainly agree with your findings regarding sound quality. Both you and Ric use the Puritan conditioner so I’ll probably check that out in my system at some point. Good to see you can go 4 hours without the fan kicking on. How much power does your system use? Grannyring said he was looking at the AC300/B300 combo so I assume he would be interested too. Thanks

@viber6 Thanks for telling me about the Tweak Audio Inverter Power article. That was a huge help, now I have some idea of what people are talking about. First however, I need a new tonearm for a Thorens that I’ve been modifying into a dedicated mono table that will out perform a Linn LP12. After that project, an entry level battery system will be the newest priority. As you know with this hobby, it never ends.

As for my ASR Emitter II Exclusive, it is a beautiful sounding amp. The battery has six lead acid gel batteries that need replacing about every ten years. I’ve replaced mine once so far. The two power supplies charge the battery and the amplifier has a particular setting for the charge while the amp is turned off. No special power cables for the power supplies and battery are needed, just those that came with the amp. It’s recommended to charge the battery about every three days if listening every day.

As for the ASR’s sound, it has a fully fleshed out presentation with a full dynamic range. It’s clear and musical with a black noise floor and a very wide soundstage. A harpsichord might sound as if it’s nine feet long however that’s the only time I might question the representation. It’s never taxing but it’s never artificial sounding.

My digital and analogue rigs are simply plugged into a passive PS Audio line conditioner while implementing Akiko Audio tuning sticks. There’s nothing objectionable about the sound. There’s always room for improvement but I’m in pretty good shape. I also need a better power cable for my DAC and on the note, upgrades happen rather slowly. 

@sbayne , Sorry, I have not yet updated my system page but the Phono stage is now a Channel D Seta L plus and I have a pair of Atma-Sphere MA 2's in construction as we speak. They are class A and I just checked, They burn 1600 watts at idle. They are going to run the Sound Labs and the JC 1s will do sub woofer duty. So the updated system will burn 3600 watts at idle. The current one will burn 4800 watt at full output. The QSC amps are running on 2 ohm loads. Why do I need that much power? There is no such thing as too much head room. It is wonderful to have a system that can drift along at 105 dB in effortless fashion.

@theaudiomaniac , I may have stepped in it but the fact of the matter is that there are much better ways of improving the performance of your system than battery power supplies for line level equipment. I certainly will not be buying one as I do not have a noise issue. With all levels pegged I can not hear any noise at the listening position. There is nothing to gain. 

@mijostyn - I’m sure those Atma-Sphere MA-2 monos are going to be incredible with the SoundLabs. A number of years ago, I heard the Majestic 845s paired with an earlier version of the MA2s and a Micro Seiki RX-5000/RY-5500 (I forget the tonearm & cartridge) it was fantastic! One of the top 5 systems I’ve ever heard.