The grid is vulnerable as a system. We have to stop always thinking about being connected to or relying on the utility grid. Think in terms of building an independant 12 volt DC system (low voltage) for the average dwelling to operate independant of the grid by charging batteries from solar or wind and utilizing the energy real time or later from the batteries. It seems everyone has visions of large expensive rooftop systems but starting small and building up over time will reduce the utility bill by substitution. We need to be energy independant on a small scale as well as looking at the big picture. Small systems can easily run lights, TV’s, radios, even a small refridgerator for essentials. You would still need the grid power for large loads like heat, large refridgerators, etc but you can have a seperate system to rely on if you suffer some calamity. With the advent of the “smart” grid, you dont want to be connected to the grid. Remember, the wires are antennas as well as conducting electricity. We owe our reliance on a large electrical system to Nickolai Tesla who developed high voltage alternating current power systems that won out over Thomas Edisons Direct Current system around the turn of the last century. The idea was to minmize power loss over long distances. Therefore we should all promote local or household Low voltage DC solar or wind systems to reduce the use of grid power and for much better reliability. Through the years I have built a very economical system comprised of several solar panels with a capacity of about 130 watts that automatically charge 6 large deep cycle and regular batteries from which I operate some radios , lights and in the event of loss of utility power, a small refridgerator. I also have a couple of cheap store bought DC to AC inverters if I need to operate an AC device, Solar panels have come down in price dramatically and production capabity is expanding, so start now. Think independant and start small instead of suffering mega system price hesitance. A world of 12 volt dc devices are available from hardware, marine, automotive and internet sources. You just have to start. Be the first on your block to confuse the lineman who show up during a power failure. I did.
I posted the above text on the new york times "Green Inc" energy blog back on september 23, 2009 as a comment to an article regarding solar power in africa. The internal discharge in a deep cycle battery is only about 50 milliamps which I consider insignificant.
I dont want to be connected to the grid which I consider "STUPID" and you dont either. Dont follow, think for yourselves.
Think about this..... brain waves operate up to about 20 cycles per second, imagine what 60 cycles is doing to you and the world.
Pat
Think in terms of ... an independant 12 volt DC system.. starting small and building up over time... We need to be energy independant on a small scale...
Agree, but think in terms of big panels if you want low cost. I have Eighteen 1 foot solar panels on my car that produce 215 watts total, but the cost for small panels was $2400.
Now the cost of a single 3.3' by 5.5' house panel is only $600 and it produces 225 watts. A 4 to 1 cost savings. So you can get a lot more watts per dollar by getting a large panel. Though it is a 30 volt panel good for a 24/28 volt battery system. You can still use it for a 12v system by charging the batteries in series and using them in parallel or getting a 24VDC to 12VDC converter available at any truck parts store.
Bob, Wb4APR
Ok, I'm not *trying* to be dense here, but regardless of whether you tie into the grid, use batteries, or have an off-grid system with no batteries that only works during the day, what happens to the 30% waste of generated electricity that is dissipated as heat? What am I missing?
Something you *all* must be aware of, those transformers on the pole work both ways: 7200VAC down to 240VAC and 240VAC back to 7200VAC. If you get a lineman out there working on a phase he thinks is not hot and he gets seriously injured or killed, you will be liable. I'm *not* saying this to discourage you, but to make sure you use a licensed electrician to install a proper automatic disconnect switch. Alabama Power requires an automatic disconnect.
73, Joel, W4JBB
Bob Bruninga wrote:
Think in terms of ... an independant 12 volt DC system.. starting small and building up over time... We need to be energy independant on a small scale...
Agree, but think in terms of big panels if you want low cost. I have Eighteen 1 foot solar panels on my car that produce 215 watts total, but the cost for small panels was $2400.
Now the cost of a single 3.3' by 5.5' house panel is only $600 and it produces 225 watts. A 4 to 1 cost savings. So you can get a lot more watts per dollar by getting a large panel. Though it is a 30 volt panel good for a 24/28 volt battery system. You can still use it for a 12v system by charging the batteries in series and using them in parallel or getting a 24VDC to 12VDC converter available at any truck parts store.
Bob, Wb4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (3)
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Bob Bruninga
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Joel Black
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Thomas McGrane