should home electronics and appliances start being offered to work with DC source?
background: the battle of AC and DC goes back to the days of Edison and Tesla. Edison was a fan of DC (direct current) and Tesla proposed AC (alternating current). DC was mostly safer than AC, BUT AC could be transmitted much longer distances allowing fewer sub stations and getting electricity to more people. In the United States we receive AC to our homes and MOST electronic equipment takes that AC and converts it to DC power for use within its circuitry.
thought: People are moving to solar panels on their homes, the power from these solar panels are stored in batteries that create a DC power supply. The power is not having to be transmitted large distances within your own home. so why convert from DC to AC only to have it go back to DC? If you have a home running on solar panels/ other “green” form that creates DC, wouldn’t it be more efficient to have your electronic equipment operate straight off of that DC power?
I think we are ready for some pilot programs to test your idea. In USA 3 pins is standard, so up to 13 volts could be supplied between the low and the round ground pin. A few appliances short those pins together, so that would need to be corrected and ground fault protection would need to be modified to ignore the 13 volts dc. 13 volts dc is the wrong voltage for some things, but several percent of our electricity could be 13 volts dc instead of the present ac. Your utility could also provide 12 volts dc at low wattage which you could supplement with your batteries, solar panels, wind turbines etc When you had a surplus, your neighbors could use your surplus with a 12 volt grid super imposed on the regular 120 volts ac. Typical house wiring can tolerate about 10 amps of dc in addition to about 20 amps of ac at only slightly increased fire risk, so the total 13 volt maximum load on each circuit would be about 130 watts dc. That would provide about 1/2 of the wattage for typical computers, printers and other auxiliaries, plus low level LED lighting throughout the house and yard. 4 LEDs is series light properly from 13 volts dc, except some older LEDs would need to be connected 5, 6 or 7 in series.
Edit: I suggested 13 volts in house instead of the 12 volts dc of the utility so each house can supply some of their extra power to the neighborhood 12 volt dc grid. Also regulated and filtered 12 volts is readily obtained from 13 volts dc which will have a few millivolts of 60 hertz ac riding on it. Neil
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