put your hifi on a battery. it don’t get any better than that
Not if there’s a nasty inverter involved, solar or battery, it can be worse as I found out, because the inverters are even worse than SMP’s for injecting nasty HF noise into your household wiring.
Now I switch off my solar inverter when I listen seriously and any smp powered things like computers tv, pvr chargers etc, now I have consistently good sound, where before at times it was good other times not.
Cheers George