nlh_90210 wrote: Why isn't any body talking about H2G ...
Although I mentioned this in the other forum, I would like to repeat the following:
V2G and H2G are needed only when all the generators on the grid are working at their max capacity and there is a demand beyond the combined power. That happens only when everybody is watching an MLB all-star game with air conditioners at full blast and factories, shopping malls and offices are fully in operation. Other times the grid does not need your help. Actually the grid dumps electricity into the ground to stabilize the load during off-peak hours. In other words, during off-peak hours the energy from your V2G or H2G and solar panels or wind generators are just wasted by the utility companies even though you are paid for the energy supplied to the grid. Besides, supplying energy back to the grid is a nuisance to utility operators because of the Ferranti effect.
Better yet is the use of the A123 type of low-cost, small and high-capacity battery to store energy from the grid during off-peak hours and use it during peak hours by cutting off your house from the grid. If you charge 16KWH of energy into your battery pack (UPS) in, say, 8 off-peak hours, it should be good for 4 to 8 hours to keep fridge running, cook lunch, do the laundry, watch TV, surf the net and even keep your room cool, all off the grid. Suppose one million households are equipped with this UPS and are off the grid during the peak hours, you are talking about some 2GW of power shaved off the peak, which will certainly allows the utility operators decommission one or two power plants.
This in turn improves the bottom line of utility companies and reduces CO2 and other harmful emissions. You also do not have to worry too much about power outages caused by strong winds or ice storms. Another benefit of this high-capacity battery is that it can stabilize the unpredictable nature of the solar and wind generators.
The concept of peak shaving is not new. But, it is becoming reality because of the A123 battery.