csp

Among the Internet cognoscenti, Bill Gross is best known as the head of tech incubator Idealab. Now, as the CEO of solar start-up eSolar, he's working in renewable energy, but he's still putting his digital economy chops to work.

Two-year-old eSolar is having an opening ceremony for its pilot solar power plant in Lancaster, Calif., on Wednesday. There's a veritable glut of solar start-ups, but eSolar has already gotten further than most: it's actually producing electricity at below the price consumers pay in California.

The plant is also the first concentrating solar "power tower" … Read more

eSolar is doing what so many other solar start-ups wish they were already doing: feeding electricity into the grid.

The 2-year-old concentrating solar company on Wednesday will host an event in Lancaster, Calif., to celebrate the opening of a demonstration facility that's converting the sun's desert heat into electricity.

At five megawatts--enough to supply about 1,500 homes or up to 4,000 during peak hours--it's making a modest contribution to overall electricity generation. But the Lancaster plant has been crucial to proving that eSolar's technology produces cost-effective electricity and can be replicated, said company CEO … Read more

Abengoa Solar of Spain on Monday reported successful tests of its second solar tower in operation, in which the sun's heat is used to make electricity.

The 531-foot solar tower, located near Seville, Spain, features a number of improvements on the first design and has exceeded the anticipated output. Called PS20, the installation is the largest in the world with a capacity of 20 megawatts, enough electricity to supply 10,000 homes, according to the company.

A solar tower configuration uses a field of heliostats, or mirrors, to concentrate sunlight onto a receiver held in the tower. The heat … Read more

Updated at 12:05 p.m. PT with additional details from a conference call with reporters, and correction added on the shape of eSolar's mirrors.

Power plant operator NRG Energy on Monday announced a deal with start-up eSolar to build 11 solar power plants in the Southwest U.S.

The agreement will lead to 500 megawatts' worth of solar energy production at peak capacity, enough to power 400,000 homes, according to the companies. The first plant is expected to be operating in 2011. The size of a traditional natural gas or coal power plant is roughly between 500 … Read more

Utility Southern California Edison on Wednesday announced a giant solar energy contract with BrightSource Energy, which could eventually result in powering 845,000 homes with the sun's energy.

Through a series of seven projects, SCE intends to purchase up to 1,300 megawatts of electricity from BrightSource Energy's solar towers that use heat to produce electricity.

Although the companies didn't provide a price tag for the deal, it's one of the biggest solar energy contracts to date in the U.S. and a validation of solar tower technology. The project still needs to be approved by … Read more

Updated at 10:00 a.m. PT with comments from Ausra providing more detail on its strategy.

Because of a lack of financing, solar-technology company Ausra has dropped plans to make massive solar-thermal power plants in favor of smaller, cheaper units.

Ausra President and CEO Bob Fishman told different news outlets this week that the company has been forced to change its business strategy in response to the credit crisis. The company is also laying off staff as part of the reorganization, according to reports.

The change is a clear sign of how the credit crisis and the current structure … Read more

Update on October 13, 2008 6:30 a.m. PT: Corrections to the SkyFuel's relationship to NREL and it's projected cost of delivered electricity.

Even with the teetering economy, solar companies are bullish that tapping free energy from the sun is a solid financial move.

SkyFue on Friday is hosting an event to unveil its solar power plant system: a parabolic trough made from reflective plastic. Colorado Gov. Bill Rittner will speak at the event, held at SkyFuel's research center in Arvada, Colo.

Parabolic troughs have been around for decades and are considered the incumbent technology in … Read more

If giant solar thermal power plants spread across the desert are like a mainframe, Sopogy is making the equivalent of a personal computer.

The Hawaii-based company on Tuesday at the Intersolar 2008 conference will show off the latest version of its MicroCSP--essentially a shrunk-down version of concentrating solar power (CSP) equipment used in power plants.

It's a trough with a reflective coating that focuses sunlight onto a pipe that carries an oil. That heated liquid goes through an organic Rankine cycle engine to convert it into electricity.

The conventional thinking in solar these days is to think big. … Read more

Hewlett-Packard is licensing flat-panel display technology to a start-up that could lead to dramatically more productive--and aesthetically pleasing--solar panels.

The deal, announced Wednesday, allows Livermore, Calif.-based Xtreme Energetics to use HP-developed transparent transistors to bend light in concentrating photovoltaic, or CPV, solar arrays. CPV systems squeeze more electricity from panels by maximizing the light that hits solar cells.

The company is in the process of raising an "imminent" $5 million series A round of venture funding, and it anticipates a series B $35 million round, CEO Colin Williams said.

It intends to have a first-generation solar array … Read more