Off the Grid Listening-HELP!

I have an off grid house and run my stereo easily off it. With that that said I was careful in choosing the electronics such that it all uses maybe 50 watts when running. But that figure is highly dependent on your gear and it could easily be 300 watts which is a huge difference in terms of load and the required gear. First thing is to compute the power you need with current gear and take things from there. Search for “clamp meter” and if that is too complicated best to hire someone. 
 
In my off grid setup I am using a class D integrated amp, topping DAC, bluesound node and average efficiency speakers. The house is off grid but if just the stereo you need to figure out what size batteries, inverter, and panel to get. 

Mterle, it would help if you outline why you need off grid. It is more complicated but anything can be done with some homework and money. 
 

As mentioned above a generator can work to supply power but if one of your main goals in this is audio experience generators outside are loud and add so much ambient noise I don’t even listen to the stereo if I have to use the generator. There are some ways to mitigate this but not to my satisfaction. 
 

Smart man, Astolfor.  I figured you had done something like that as a well insulated enclosure is the only solution I know of. None of this is particularly cheap. 
 

I figure OP needs to have other power (lights etc) in there which is why I was curious to the reason. Or it could be just wanting “clean” power.

mterle, This is tricky. Here are some rough numbers from :

A 12 volt 100Ah deep-cycle battery with regular depth of discharge 50% would run a fully-loaded 1000 watt inverter for 34 minutes. This calculation takes into account average pure sine wave inverter efficiency of 95%.

The easiest way to calculate 100Ah 12 volt deep-cycle run-time is to convert the amp-hours to watt-hours. Simply multiply available Ah by the battery voltage to find its watt-hours capacity:

Battery watt-hours = amp-hour capacity x battery volts

Battery watt-hours = 100Ah x 12V = 1200 watt-hours

If you are using 1000W you'll really need a full on system of some sort with likely at least 4 12V deep cycle batteries just to run things for a couple hours. Then you'll have to charge them with panels or a generator.   

I'd opt for the low power route and make that tradeoff but that's just me. Big loads are expensive and get complicated to build in that capacity unless money and space don't matter. 

“jbs, wouild you please clarify what you meant by, "I'd opt for the low power route and make that tradeoff but that's just me. Big loads are expensive and get complicated to build in that capacity unless money and space don't matter."

Thanks in advance. Also, any reason not to go with lead acid batteries here since weight and space aren't issues?”

sorry for not explaining. I was just noting my personal preference to utilize low power gear as the system design is simpler. Fewer batteries, smaller inverters, less wiring, much easier to power and charge batteries. But that is me. 
 

lead acid are what I have but they are specialized for off grid (ie. not the regular RV or deep cycle auto batteries which are the most cost effective) use. AGM Matt so they do not require water and have minimal gassing off. If you get old school lead acid batteries be sure you are good with adding water and inquire about gassing off. You don’t want the batteries in same airspace you would stay in for long periods of time. Ventilation can address this. 
 

I have never measured the cleanliness of what my inverter puts out. Audio System is dead quiet so that works for me and no fired electronics to date. Brand is Schneider but many good brands depending on exact sizing and needs. I can run a 220v generator into the system to charge the batteries if needed. If you want that type of flexibility gotta inquire on the exact gear early. Solar can run everything for me but have an easy line of sight to the sun and do not need tons of power either. 3000w or 9 panels runs a small house including well water. 
 

if you do get power working there LED lighting is super easy and very low power to add.