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A rooftop solar panel converts sunlight to electricity. In a new study, an expert describes progress toward an efficient and inexpensive method for storing and distributing solar energy in the home. Credit: Wikimedia Commons

New scientific discoveries are moving society toward the era of "personalized solar energy," in which the focus of electricity production shifts from huge central generating stations to individuals in their own homes and communities.

Home-scale electricity generation is the topic of a report by an international expert on solar energy published in the ACS' Inorganic Chemistry: "Chemistry of Personalized Solar Energy" . It describes a long-awaited, inexpensive method for solar energy storage that could help power homes and plug-in cars in the future while helping keep the environment clean.

Daniel Nocera explains that the global energy need will double by mid-century and triple by 2100 due to rising standards of living and world population growth.

Personalized solar energy - the capture and storage of solar energy at the individual or home level - could meet that demand in a sustainable way, especially in poorer areas of the world.

The report describes development of a practical, inexpensive storage system for achieving personalized solar energy. 

Fuel Cell Solar Energy

At its heart is an innovative catalyst that splits water molecules into oxygen and hydrogen that become fuel for producing electricity in a fuel cell. The new oxygen-evolving catalyst works like photosynthesis, the method plants use to make energy, producing clean energy from sunlight and water.

"Because energy use scales with wealth, point-of-use solar energy will put individuals, in the smallest village in the nonlegacy world and in the largest city of the legacy world, on a more level playing field," the report states.

SOURCE:

"Chemistry of Personalized Solar Energy"
Inorganic Chemistry

IBM developed a unique, eco-friendly way to recycle scrap silicon "wafers" -- the base material used for chips in everything from computers to consumer electronics. The process has dual advantages for the environment, as it will help reduce the estimated 3 million silicon wafers discarded each year across the computer industry, while also providing new supplies of raw materials to the supply-constrained solar energy industry.

Community solar continues to attract a lot of attention as a means to expand participation in distributed solar energy generation.

Massachusetts New Metering

In the past year, Massachusetts has implemented a statewide neighborhood net metering program approved in 2008 legislation.

• Under the final rules, all net metered systems, including neighborhood net metered systems, may over-generate relative to on-site load.
• Regular net metered customers may either rollover credits in perpetuity or allocate excess generation credits to other customers of the same distribution utility.
• Neighborhood net metered customers must have a minimum of ten residential customers identified for distribution of excess generation credits and all customers served must be within the same municipality, ISO-New England's load zone, and service territory of one distribution utility.
• Regular net metered system credits are based on a fully bundled retail rate, excluding customer charges and a public goods charge.
• Neighborhood net metered system credits are based on the fully bundled rate minus the distribution portion and also exclude the customer charge and public goods charge.
• Excess generation credits are allocated as a dollar amount and are based on the rate class for which a host customer takes service.

A number of states continue to discuss community net metering programs in various contexts including California, Colorado, New Jersey and Washington.

Given the potential promise community solar programs offer in expanding solar markets and the intersection of community solar policies with net metering, IREC anticipates being involved in these states as they move forward with implementation. As part of those efforts, IREC has begun development of a community net metering model designed to incorporate the best practices of net metering within the larger framework of community solar.

SOURCE:  IREC 2009 Annual Report