There is a good overview in today’s Guardian regarding the status of affairs with respect to electricity storage technologies:
So with grid parity now looming, finding ways to store millions of watts of excess electricity for times when the wind doesn’t blow and the sun doesn’t shine is the new Holy Grail. And there are signs that this goal — the day when large-scale energy storage becomes practical and cost-effective — might be within reach, as well. Some technologies that can store sizeable amounts of intermittent power are already deployed. Others, including at least a few with great promise, lie somewhere over the technological horizon.
I have used the “Holy Grail” term several times to describe cost effective storage of electricity. I have also given “energy storage” as an answer when people ask what we should be focusing more attention on. While this article is perhaps overly optimistic, it provides a good overview of what people are working on.
I also read a good article last night on renewable energy in India:
Despite the deepening energy crisis, renewable energy, predominantly wind and biomass, make up 3 percent of India’s total electricity production. Solar energy is not even a fraction of that, though India receives abundant sunshine throughout the year.
But India hopes to move from near-zero to 20,000 megawatts of solar electricity by 2020, as part of the National Action Plan on Climate Change. Announced in June 2008, the plan is a structured response to combat global warming and part of a proposal India intends to pitch at a climate change summit in Copenhagen this December.
If there is one thing the world desperately needs, it is for India and China to embrace renewable energy as their economies grow. If they do not, I think their growth is going to encounter fierce economic resistance as their growing energy needs start to put serious pressure on oil prices.