More than a dozen members of the House of Representatives have asked two federal agencies to look into claims that solar leases are being oversold to consumers, according to published reports.

Last month, Rep. Paul Gosar of Arizona and 11 other House Republicans wrote to the Federal Trade Commission (FTC) with claims that leasing solar panels are potentially harmful investments for homeowners, according to The Daily Signal, an arm of the Heritage Foundation, a conservative Washington-based think tank.

Separately, four Democratic representatives wrote to the U.S. Consumer Financial Protection Bureau in November with similar concerns, a report in The Arizona Republic says.

Solar leases offer a way for consumers to get some of the benefits of a photovoltaic (PV) system without paying steep upfront costs. Installers put up the panels and then charge homeowners for the electricity they generate, promising lower rates than what their utilities would charge and costs that are locked in for the life of the agreement.

“The benefits of solar leasing are huge,” SolarCity promises at its website.

Letter warns of ‘potentially deceptive sales tactics’

The Republican House members told the FTC that the federal Investment Tax Credit (ITC) and third-party leasing arrangements together have resulted in a surge of PV installations. But, they added, the leasing market may pose a “considerable risk” to consumers who don’t have all the information they need when they sign up.

“Under pressure from Wall Street to sign up more leasing customers before the ITC expires, these companies are reported to be using potentially deceptive sales tactics–practices that, if true, merit investigation,” the letter said.

“Of particular concern,” the letter continued, “is the possibility that these third-party leasing companies may be utilizing marketing strategies that overstate the savings the homeowner will receive, while understating the risks associated with agreeing to a decades-long lease that is often secured by a second deed of trust to the house–a financial commitment that will likely exceed both the life of the roof and the duration of the lessor’s home ownership.”

The representatives cited reports of class-action lawsuits in California and Louisiana in which homeowners allege “fraudulent marketing and overstating potential savings.” They also referred the FTC to claims that homeowners signing long-term leases were “struggling to sell their homes, indicating they were not fully aware of the terms of their 20-30 year leases.”

Similar claims from Democrats

In November, according to The Arizona Republic‘s account, three Democrats from Arizona plus a House member from Texas raised similar claims with the Consumer Financial Protection Bureau. The four representatives said that leasing companies “may be overstating the economic benefits” of signing long-term leases.

The newspaper says that the Democrats’ letter asked whether the agency, created in the wake of the housing-market collapse and financial meltdown five years ago, has considered giving consumers recommendations about solar leases to protect them from financial harm.

“Customers are quoted savings each month on their utility bills,” the letter said. “However, who calculates those estimations and are they accurate?”

Will Craven, a spokesman for solar installer SolarCity, said that the company complies with the law and that it uses a standard industry contract. Craven also said that Arizona’s largest electric utility, Arizona Public Service Co., is known to be lobbying Congress and was probably the source of this “misinformation.”

“SolarCity depends on positive word of mouth to sell our systems,” Craven told the newspaper, “and unlike APS, we have to satisfy our customers in order to make money . . . As a market leader that prioritizes consumer protection, SolarCity looks forward to working with the [Consumer Financial Protection Bureau] and members of Congress on this important issue.”