News and commentary about ecodesign, geothermal heatstorage, PAH seasonal storage, urban farming, rainwater harvesting, grey water recycling, natural ventilation, passive summer cooling, energy autonomy, off grid solar comfort, as well as refined prototypes i am currently building.
Wednesday, January 4, 2012
Zinc-Air Battery With 30-Year Life Could Revolutionize Grid Energy Storage, Boost Wind & Solar Adoption
The technical highlights, according to EOS, are that its zinc-air battery could last for around 30 years (they claim to have reached 2,700 cycles without degradation) at about half of what additional natural gas would cost. The company wants to sell megawatt-scale batteries with 6 hours of storage at a capital cost of $160 per kilowatt-hour. They could be used to store energy at times of low demand to then release it during peak time, acting as a kind of damping buffer. They could not only be used to absorb the daily demand cycles, but also to store renewable energy from intermittent sources; for example, it could store energy from a wind farm over a windy night and then release it to the grid the next day during peak demand time. This is something that grid-connected electric cars can also help with, especially if we have a smart grid that can communicate with them.
EOS Energy Storage is currently raising funding from investors and will start taking pre-orders in the Spring of 2012, but it's not clear when they'll start shipping batteries. If their claims are accurate, I hope that they'll be able to ramp up production quickly and get to large scale deployment soon, because we really need more energy storage on the grid.