I've installed a lot of inverters, but for data systems. (not UPS's) I have to ask just how much battery do you have? It is true that you will have total isolation. (super clean & low noise floor) But inverters aren't very effecient. Do you have a charger (rectifier) that can keep the charge up while your battery is under load? It would be interesting to try on audio gear. In the long run I don't know about the maintance. Sealed batteries last about 5 years and I know your not looking at wet cells. The installs that I am used to have a rectifier (AC-DC) charging the battery at all times. The battery acts as a filter while the inverter (DC-AC) supplies fully protected AC power. I would guess that you would have to have a system with extreme resolution to hear the difference between a PS power plant and an Inverter power supply. Maybe I can get a Tech to run some tests with my P300 vs an Inverter output.
DC Power/AC Inverter power supply
Has anyone tried running a 12 volt DC battery with an AC inverter? There is a computer grade AC inverter that is supposed to produce a pure 117 volt AC sine wave (I don't want to mention the manufacturer). In theory this will eliminate the power grid AC grunge better than a power conditioner, even the PS audio power plants (since there are no AC artifacts ANYWHERE in the chain). I have been told that the artifacts of producing AC power in this manner far outweigh the AC grid isolation. Again, this is not an el cheapo converter. Anyone ever try this for low power draw pre-amps and digital equipment?