If you haven’t embraced solar energy yet, it may be about time to do so. After all, it is cheaper than grid energy in 42 of the 50 largest cities in the United States.

According to the study “Going Solar in America: Ranking Solar’s Value in America’s Largest Cities,” a fully financed solar system costs less than residential grid energy purchased in over 80 percent of the largest U.S. cities. Additionally, 9.1 million single-family homeowners live in a place where their utility bill outpaces what solar would cost.

The falling cost of solar panels and solar fuel cells is largely driven by, in part, research into new materials and developments in the sciences. Check out a few interesting reads on solar energy from the ECS Digital Library:

• “Photobioelectrochemistry: Solar Energy Conversion and Biofuel Production with Photosynthetic Catalysts” (It’s open access!)
• “The Role of Energy Levels in Semiconductor-Electrolyte Solar Cells“
• “Photoelectrolysis and In Situ Storage of Solar Energy” (Throwback to 1989!)

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Until now, the motor and the inverter, which converts the battery’s direct current into alternating current for the motor, were two separate components.
Credit: Siemens

A team of engineers at Siemens’ has developed a way to save space, reduce weight, and cut the cost of electric car production. The team’s solution revolves around integrating an electric car’s motor and inverter, which have always been two separate components prior to this development.

This from Siemens:

The solution’s key feature is the use of a common cooling system for both components. This ensures that the inverter’s power electronics don’t get too hot despite their proximity to the electric motor, and so prevents any reduction in output or service life.

Read the full article here.

Accordingly, the weight of the vehicle is reduced due the integration of the inverter into the motor, which will now only need a single housing. Additionally, the development produces added installation space that can be used for a charging unit.

For more information on current and future developments in the electric car industry, check out some of our past coverage or head over to the Digital Library to see what our scientists are working on.

The new solar battery stores power by “breathing” air to decompose and re-form lithium peroxide.
Credit: Yiying Wu/Ohio State University

Is it a solar cell? Is it a rechargeable battery? Well, technically it’s both.

The scientists at Ohio State University have developed the world’s first solar battery that can recharge itself using light and air. The findings from the patent-pending device were published in the October 3, 2014 issue of the journal Nature Communications.

This from Ohio State University:

Key to the innovation is a mesh solar panel, which allows air to enter the battery, and a special process for transferring electrons between the solar panel and the battery electrode. Inside the device, light and oxygen enable different parts of the chemical reactions that charge the battery.

Read the full article here.

The university plans to license the solar battery to industry.

“The state of the art is to use a solar panel to capture the light, and then use a cheap battery to store the energy,” said Yiying Wu, professor of chemistry and biochemistry at Ohio State University. “We’ve integrated both functions into one device. Any time you can do that, you reduce cost.”

The device also tackles the issue of solar energy efficiency by eliminating the loss of electricity that normally occurs when electrons have to travel between a solar cell and an external battery. Where typically only 80 percent of electrons make it from the solar cell into the battery, the new solar battery saves nearly 100 percent of electrons.

Want to know more about what’s going on with solar batteries? Check out the latest research in ECS’s Digital Library and find out what our scientists think the future looks like.