Correction appended.

Rep. Ed Markey (D-Mass.) and conservative think tank the Heritage Foundation are rarely on the same page when it comes to energy policy, but neither is a big fan of the "No More Solyndras Act," which is set for a House vote this week.

Republicans have described H.R. 6213 as a way to wind down the Department of Energy loan guarantee program that provided $535 million in federal funds to the now-bankrupt California solar manufacturer Solyndra LLC. But Markey has pointed out that the bill doesn't actually end the loan program. Rather, it would allow the department to continue issuing loan guarantees to companies as long as they submitted their applications before Dec. 31, 2011.

Markey -- who actually supports the idea of providing loan guarantees as a way to spur the development of renewable energy sources -- believes the cutoff date was included in the legislation to allow Republicans to move billions in DOE loans to nuclear energy companies.

Republicans have said that date was picked to protect DOE from liability from companies that could be harmed financially by DOE's pulling the plug on the program.

But during the battle over the legislation in the House Energy and Commerce Committee earlier this summer, Markey sought to drive a wedge between congressional Republicans and their conservative base by highlighting the billions in loans that could still go out the door under the No More Solyndras Act.

Markey dubbed the legislation "one of the greatest political frauds of all time" and sent letters to conservative groups including the Heritage Foundation urging them to study the legislation further.

The effort seems to have produced results.

Today, the Heritage Foundation will join the National Taxpayers Union and the Competitive Enterprise Institute on a conference call hosted by Taxpayers for Common Sense in which the groups will discuss their concerns with the No More Solyndras Act.

A press release yesterday noted that the four groups are concerned that a number of "zombie projects" would move forward under the legislation and that they could be more costly to taxpayers than the more than half-billion dollars wasted on Solyndra.

"Instead of being a fix for what ails the federal loan guarantee program, the No More Solyndras Act would countenance exactly the opposite of what its name suggests: the prospect of more Solyndra-like loan guarantee defaults, on an even larger financial scale," the release said.

Markey said yesterday that he welcomed the input from the groups on the bill, especially when it comes to "amendments that impose real constraints on the Energy Department's authority to award further loan guarantees to companies like [U.S. Enrichment Corp.] whose projects or finances indicate a potential taxpayer exposure far greater than that of Solyndra."

Heritage Foundation Nuclear Energy Policy Research Fellow Jack Spencer, who will be on today's call, said yesterday that his concern with the bill stems from his general aversion to providing subsidies for energy. But he also acknowledged that the bill isn't without some merits.

"It's a good first step, and it brings the failed loan guarantee program to a defined end, and that certainly is critical," Spencer said.

But if the loan program has to continue, he added, the bill has plenty of room for improvement to take the politics out of the process.

Correction: The original version of this story indicated that all the groups would oppose the legislation today. Only Taxpayers for Common Sense opposes the bill as written.