The anemic economic recovery may have hit the dog days of summer with consumer spending and factory orders slowing, but the new energy economy continues to surge, according to a report released Tuesday by Ernst & Young.

Venture capital (VC) investment in renewable energy, electric cars, energy efficiency, and other green technology jumped to $1.5 billion in the United States in the second quarter of 2010, a nearly 64 percent spike over the second quarter of last year. Green tech investment now has returned to the record levels of the third quarter of 2008, before the global economic collapse shut down the VC’s ATM.

So where’s the money going? Between March and June, at least, investors hitched a ride with startups developing electric cars and the infrastructure to support them. Better Place, the Palo Alto company building electric vehicle charging networks around the world, snagged $350 million. Fisker Automotive, a Southern California startup building a sexy and pricy plug-in hybrid sports sedan called the Karma, scored $35 million, according to the report.

Solar remains a hot opportunity for venture capitalists, with nearly $439 million invested in the second quarter, a 183 percent increase from the year-ago quarter.

It’s no coincidence that the beneficiaries of investors’ largesse are also those startups that received federal loan guarantees to build big solar power plants. (Raising additional capital usually is a requirement for obtaining such federal loan guarantees.)

BrightSource Energy, for instance, secured a $1.37 billion loan guarantee from the U.S. Department of Energy to build its first solar power plant, now undergoing licensing in California. It then quickly raised $180 million from investors.

VCs also continue to pour cash — nearly $200 million in the second quarter — into energy efficiency startups, which tend to be far less capital-intensive than renewable energy companies.

So it’s a good time to go pitch that great green tech idea you’ve been kicking around, right?

Not necessarily. Ernst & Young notes that nearly 59 percent of investment in the second quarter went to so-called later-stage startups that are well on their way to rolling out products.

In other words, venture capitalists seem to be more interested in priming the pipeline for an initial public offering or acquisition that will produce a big pay day than in financing what green tech investor Vinod Khosla calls “science experiments.”