California’s Solar Lease/PPA Boom Keeps On Rockin’

Third-party installs – where homeowners get rooftop solar power but don’t buy the panels – have accounted for 68 percent of all new systems installed in California so far in 2012, according to the latest PV Solar Report sponsored by Sunrun. And the trend is apparently accelerating.

“About 75 percent of Californians switching to solar now choose solar power service,” Sunrun’s Lynn Jurich said in a statement that accompanied the report.

PV solar report

image via PV Solar Report

This trend isn’t newly discovered, but the scope of the market transformation indicated in the new data is nonetheless striking. Last year, 44 percent of installs used the solar lease or power purchase agreement (PPA) model; in 2010 it was 20 percent; and in 2009, 11 percent.

The analysis, which uses utility rebate data through August 15, also notes that the value of the third-party contracts since the solar power service model first popped up in 2007 has busted through the $1 billion mark.

In the past, the report has suggested that solar leases and power purchase agreements were helping solar make inroads into middle-income neighborhoods. The new report bolsters that assertion: installs in areas with median incomes between $50,000 and $75,000 are up nearly five times since 2007, compared to merely doubling in the above-$100,000 income group.

While solar service can be the best – and only – model for some homeowners, analysts say those who have options should compare that scenario with the likley costs and benefits of purchasing a system. John Farrell of the Institute for Local Self-Reliance recently suggested analyzing the choice using these guidelines:

  • Projected Savings: How do projected savings compare to ownership?
  • Inflation Assumptions: A lease typically has two inflation rates, one for the lease payment (fixed) and one for the grid electricity price (a guess).  If the latter ends up being lower than forecast (I’ve seen them as high as 5%!), it can significantly reduce projected savings.
  • Lease End: What happens when the lease expires?  Can the system be purchased?  How does the purchase price compare to the projected savings to that point?  This is very important because of the potential value of the solar array to the resale price of the home.  Also one can inquire whether an inverter replacement already been done when the system is available for purchase.
  • Company History: Will the company be around in 10-15 years to fulfill their lease requirements?

Pete Danko is a writer and editor based in Portland, Oregon. His work has appeared in Breaking Energy, National Geographic's Energy Blog, The New York Times, San Francisco Chronicle and elsewhere.


  • Reply August 23, 2012

    Cesar Montesdeoca

    It’s very good to know that US is getting a better approach
    to solar and wind energy, I live in NC and I’d seen some solar farms beside the
    roads of our counties which tells me solar is also a good investment for

    Cesar M.
    Montes Electric Inc.
    Charlotte, NC

  • Reply September 8, 2012


    Now that $0 down, FHA Title 1, low interest solar loans are available, only a fool would lease a solar system. With these new solar loans you don’t need any equity in your home and you can qualify with a much lower credit score than a solar lease. The best part with a solar loan instead of a lease is that you get to keep the 30% federal tax credit and other financial incentives for yourself and you own the system instead of renting it and you won’t have a problem selling your home like you will with a solar lease. Solar leases and PPAs are history.

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