Solar Powered Stereo?

You need to talk to TWL!

Hi. Yes, I have been doing that for quite some time now. Totally stand-alone, solar powered, battery operated, individual isolated power supplies, for each item in my system. I have no connection at all to the city power pole, and have not had any for over 7 years. I run totally off solar power, with a backup generator for emergency power, in case of long weeks of overcast weather. It works quite well. I would recommend that if you are going to do this, you should obtain very low power consumption components, especially amplifiers(Like my 45, or a 2A3) and high efficiency speakers. This will allow a lower cost power generation package, and provide better run-time.

There are many benefits to providing power to your system like this, and it is feasible for lower power systems. You could do it with a big power system, but it would be very very costly and cumbersome. It could be done though, if you really wanted it, and could spend the large amount needed for high power consumption systems.

The details are quite complex, so I cannot list them here. I am getting probably the cleanest power of anyone on this website. I tried to put up a few threads on this awhile back, but got little interest. If you search the archives for "battery power", you will turn them up.

Thank you TWL. When I initially discussed it with Davehrab, I thought it made perfect sense. Are you using any additional power "purification" components, whether they be active or passive, and is there a specific type of inverter designed to work specifically with sensitive electronic components? Is there such a thing as an "audio grade" inverter?

I am presently auditioning several passive and active types of power conditioning. For many years I used on old antique API power wedge 116. Extremely effective given it's year of introduction and somewhat antiquated design criteria. Although, I'm finding that most types of passive power conditioning are pretty much doing the same thing.

I'm wondering if solar allows you to circumvent typical means of power conditioning. I'm finding that whether it be active or passive conditioning, they all seem to have their own sonic signature.

Yes, there is an "audio grade" type of inverter. It must be a pure sine-wave type, with no collateral noise generated onto the line. I use one that is made for powering remote-site mastering decks, made by Studer in Switzerland. As you know, they have been making fine recording systems for many years. It is called the Studer AJ401, and has 400watts continuous capacity, with 800 watts available on surge, like dynamic headroom. I use it only under the minimum rating. There are several units from them that go up higher in wattage ratings, up to 2Kw or 2.5Kw. Cost is a little over a dollar a watt.

I use hospital grade outlets wired directly to the inverter output, and my regular power cords from there. Of course any good audiophile power cord will help to keep any corruption from entering the signal through the power cord, so that is still a good idea. The power conditioners are not necessary, since the power is already conditioned when it leaves the inverter, to less than 0.5%THD and clocked perfectly at 60Hz, with no drift.

The only unit that I run from the inverter is my preamp. My power amp and turntable are run directly from their own individual batteries, on 12vdc. They are designed this way. So each of my components are totally isolated from each other in terms of power supply, so there is zero intermodulation of each other's power supplies, which is always present whenever you have multiple components plugged into the wall.

The direct DC power feed on TT and amp are the most perfect power feed possible. A totally flat DC feed. The preamp has a circuit that is difficult to feed with 12vdc, because it was not designed for that, and has high voltage in some of the tubes. So I use the inverter to power that.

I find this method to be very satisfactory.

Thanks again TWL. Now when can you do the install? Connecticut can be lovely this time of year....

I think the methods you've used are by far, the most logical.
I feel like I'm trying to compensate for something that shouldn't be there in the first place. But, that's my "perfect world" method of thinking. Not very logical.

My experience to date with power conditioning is not extremely extensive, but what I am finding is that I am using a "band aid" in one form or another. It also seems that depending on the type of conditioning I ultimately decide to use, I will have to also decide on the sound, presentation, etc. Another tone control.

It must be nice to not have to filter what isn't there.