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


I'm using a Bluetti AC200MAX 2,200 watt expandable power station to take my system off the city's power grid.  It runs off a lithium ion phosphate battery with a 4,800 watt pure sine wave inverter. My total system only takes about 450 watts so I have never heard the fan kick on - it is totally silent. The music comes from a completely black background, with a huge soundstage that sounds very natural. I know that Ric Schultz has talked about these types of setups and there is a very expensive Stromtank battery system that is marketed to audiophiles. Anyone else tried this type of setup in their audio system?

Here is a link to a review:

 

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@curiousjim You may not be speaking to me directly, but just out of curiosity, are you referring to mechanical clicks, or audio clicks?

@curiosjim - I wouldn't listen while its charging even if it has "pass through" charging since some inverters will "click" like that and many times the fan will turn on. I assume the low hum is also the inverter.  There is no doubt not all inverters are of the same quality even within brands. For instance, I wouldn't buy a Bluetti for home stereo use unless it part of their MAX series. 

Since I'm more familiar with the UPS world, from experience, standard UPS' (themselves) will give off a mechanical hum, and most always a fan will kick on, when a loss of power is detected and they are called for action. but I've never heard any mechanical clicks emanating from them. Double-conversion UPS's (since they're always on battery power) will typically *always* emit some hum and fan noise, continuously (fans to keep the batteries and inverter circuitry cool). That's why I try to locate them away from quiet recording/broadcast studios, or my personal listening areas. I never hear any mechanical clicking noises emanating from them either. Not sure how many audiophiles use UPS' though.   

I never heard any hums, clicks when charging and listening with N.E.W amp, Merlin BAM or Rockpals battery pack on dac and different streaming equipment lps. Fan would be on with the Rockpals.