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- Power grids : AC vs DC 7 answers
In the country where I live, Victoria, an oppresive dictator, named El Jeffo sold off the state owned power generation distribution and retailing companies to the private sector. We were promised our cake and that we could eat it too. But we all know this isn't possible. Now the situation has deteriorated to the extent that there are power generation companies, power distribution companies and retail companies that are essentially billing systems for the power distribution companies - and these billing companies spend vast amounts of money advertising huge double digit percentage discounts for overpriced electricity. Needless to say, with such huge advertising overheads
A coup took place, and El Jeffo was deposed, but given a role to play football manager. A new regime took over, and it decided that solar was good, and paid huge vast subsidies to people that would install solar systems. Things were good, so long as the sun was shining as you could sell AC power back to the network, not noticing the huge increases in prices that were taking place.
Now, the era of belt tightening has come upon us, and for this reason we are looking at improving efficiency. It is no longer profitable to send the power out via AC. Given that most solar is DC, batteries are DC and cell voltages are in the low single digit volts, and I2R losses would be short for short cable runs, and also that DC to DC converters are every efficient, no need for isolation etc would there be any benefit in efficiency in running TVs, LED lighting, most electronic appliances off some DC (everything apart from huge motors and resistive heatime appliances) and what would be good standard voltages for households for power that is generated and distruted only within the household?