can you recommend a regenerative one? I can cancel this as it hasn’t shipped.
Like
@solderdude stated already, you need an online UPS but please consider some facts before purchasing one:
- first you need to ask "a guy" to measure your AC mains FFT and noise from your outlet.
- you need to ask manufacturer of the UPS to send you the FFT of the UPS when loaded with 25...50% of max. capacity.
- expect huge (35...45dB @1m) amount from noise of an online UPS in your auditioning room due to the way these UPSs operates (at least 1 fan working 24/7, even when powered OFF)
- batteries may not last more than 1 year, depending on manufacturer (even when powered off the batteries are still charging and charger's fan still operates)
Unless you have a living proof that your mains power has THD+N issues and maybe lot of noise and DC coming from the energy provider, then I don't think you should invest a huge amount of money into this. But if you really want to, then at least find one that is really low-noise (<30dB @1m).
I've never used "audiophile" UPSs, instead I've used online APC and Liebert/Emerson 3KVA units and both were very noise in my bedroom, so I got rid of those and purchased a line-interactive one from Legrand. All the 3 UPSs from above are true-sinewave and have a very good FFT graph with a very low THD+N, mostly the same under 20-30% load, although I was unable to find any diff. between graph of input 230V mains and output of any of these UPSs (maybe in a "dirty" neighbour things might be different).