Power - where to start? Mains, chords, conditioner, filter?


I have a decent HiFi setup with all power cables as delivered by the manufacturer of the unit. I am contemplating upgrading the power infrastructure, but is a confused where to start? What makes the biggest bang for the buck? Power chords to each unit, mains blocks, mains conditioner, mains filter? Any advice before I move into this world? 

I have a streamer from Innuos being used for Tidal and Internet radio. A DAC from RME and an integration amplifier from Musical Fidelity. 

I live in a flat in a capital and the electricity is probably good, but for sure the SQ is better late evenings, which to some extent is leading me down this route. 
mtraesbo
@williewonka /Steve.  
The YETI charges at a lower rate than the draw on all units.  
1/4" pipe going in and 1" pipe going out.

So while you may be able to pull 300W for 3-4 hours, you can't for 8.  
The answer, of course is get a bigger unit.  But the bigger units are bigger money and require bigger / longer charge times.  

For a 1-2 hour listener there are many options.  For someone (me) who needs 8-12 hours / day, they are coming up short.  
David - thanks for the update on the YETI - Good to know

But it does seem to offer a more affordable opton than the $$$AUDIOPHILE regenerators, provided  your listening session is less than 4-5 hours (depending on system)

I think we will see more units like this as development of battery technology progresses.

There are some pretty exiting developments in the works that offer more power for the same size of battery and will not burst into flames if punctured.
e.g.
https://www.youtube.com/watch?v=m9-cNNYb1Ik

Fortunately for me, the power to my house is very good, so I do not use any kind of power conditioner/regenerator.. 

Regards - Steve
@williewonka  / Steve,
I want to disconnect the wall. because I living in a historical building, installing a clean circuit is cost prohibitive.

I want to go off the grid for 8-10 hours a day.

I just purchased:
Samlex Solar PST-600-12 PST Series Pure Sine Wave Inverter

I want to just get a 120Ahr deep cycle 12V battery and charger (~$250). Seems lots cheaper than buying a complete power system. I’m thinking the auto parts store.

Where am I crazy?

@inna5,
I am looking for deep cycle, or Li Ion.  As you pointed out I don't need CCA auto ratings. 
I'm thinking this is about the Inverter signal quality.

Anyone else?  What can be cleaner than running off a DC battery with a pure sine wave converter (top rated, but I don't know what that means).

I don't have such a thing yet, but this sounds too easy.  At 1/10 the cost of fancy cleaners and power sources. 

What am I missing?