I think everyone is overreacting a bit. You can put a filter and suppressor on your gear, but I wouldn't use a UPS unless it produces clean, sine-wave output. UPSes for consumer grade computers usually are a load of hash on a bad waveform.
Also, unregulated DC supplies will always read higher than normal when not under load. My house power is notoriously bad, and reads high (135 vac RMS via true-RMS reading dmm, 128 vac from a peak meter, 130 vac from an analog meter). Everybody handles it just fine.
Now, one thing I had on my gear for years was a homebrew latching relay system that would require a manual reset if the power sagged or dropped. I put it there to try to avoid damage to sensitive electronics. Now, I have partial solar power, and the headphone gear fails over to the sine-wave inverter and the transfer switch won't switch back to mains until after 30s above 90vac from them.
(First World, Last Mile problems)