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

@grannyring - as you know, I’ve been messing with audio gear for a long time but I had no idea of the amount of RF riding on my AC line throughout the house. Its the same result in every outlet I’ve tried that little Entech on!

@dpop - I’m always amazed of the amount knowledge and experience of individuals in the high-end audio community. THD of 0.3% in a radio station under the broadcast tower is very impressive! I see you just joined Audiogon on August 22, 2022. You should take a few minutes and post your system in the members Virtual System section with a few pictures.

@sbayne Oh that should be fun! I think I'll do that! Thanks for the suggestion! Is there a limit to how many pictures can be posted? 

@dpop - Great. I don't think there is a limit.

This is just one example of a Battery Room at a Data Center (ie, computer farm). These batteries are for mission critical UPS power. 

Typical UPS Battery Room at a Data Center

So what about when the battery is charging, is there any noise?  I tried a couple of similar devices and both had clicks when the charger went on and off and the other also added a low hum.

what is different with this product?

Thanks.

JD