Off the Grid Listening-HELP!

Thanks so much for all the replies. I do have a clamp meter and will see if I can ascertain the amount of power drawn. Are the plug-in meters any better?

This decision will come about because I will be losing use of the property where I have the dedicated listening room. The current room is only a quarter of a mile from my home. It's room inside a shop that was purpose built. I can listen to orchestra crescendos or music with driving bass rhythms and nobody knows. I happen to live on the hill on the edge of town and the new listening room is about the same distance from my house in a finished cabin up the hill from my house that I own. It is a slightly smaller space (more power!). I typically listen with a friends once or twice a week for three to four hours. I could build a generator house for either real time use or charging, bit was thinking to have an all DC to inverter system. Solar may work to charge but I'm in a canyon with Redwoods. The cabin has propane lights currently, but that may change. Not to undermine anyone's faith, but sit down listening to all manner of music is my church. I will have to make this transition. Again, thanks to everybody who has replied. Keep the thoughts and suggestions coming!

astolfor, your English is outstanding!

I would hate to give up any of the gear I have right now. I know class D amps have come along ways, and I am not anti-state, (hey I ditched the A/B sub amps) and even have a SS phono stage. But it sounds incredible now so I don't want to change things up with gear. The tube pre-amps and monoblocks draw about 600 watts. Throw in the sub amp and the turntable phono-pre. I'm guessing 1,000 tops, but I will take some real time measurements listening loud and will see where I am at.

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, thanks for the link and the formulas. I think I will need 400Ah worth of battery in a 24 volt system to start. Charging may be rough. I will need to see what solar can accomplish with the light I have, but it may be that I need to use solar and a generator. Much appreciate your input. I feel like I have some direction. Now, after buying a new Lyra phono cartridge, new phono pre (PS Audio), Audioquest Niagra and a few other items in the last year I need to save up some pennies for this!

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?