SunPower Solar Power Systems for Water Facilities Exceeding Performance Expectations

   SunPower Solar Power Systems for Water Facilities Exceeding Performance
                                 Expectations

SunPower Systems Operating At 26 California Water Agencies, Saving an
Estimated $5.3 Million in the Last Year; Two More Systems Under Construction

PR Newswire

SAN DIEGO, Dec. 4, 2012

SAN DIEGO, Dec. 4, 2012 /PRNewswire/ -- At the opening of the Association of
California Water Agencies (ACWA) Fall Conference today in San Diego, SunPower
Corp. (NASDAQ: SPWR) announced that SunPower solar power systems installed at
26 water agencies and districts in California have exceeded expectations for
overall performance. Generating the equivalent amount of electricity to power
8,800 homes each year, SunPower estimates that the systems have saved the
state's public agencies a cumulative total of approximately $5.3 million over
the last 12 months.

SunPower, which has designed and built about 25 megawatts of solar power
systems at 43 water facility sites over the last decade, reported that those
systems are generating, on average, 102 percent of expected production.

"Water agencies and facilities typically have huge energy demand and a
responsibility to rate payers to minimize operational costs," said Howard
Wenger, SunPower president, regions. "SunPower delivers the most efficient and
reliable solar technology on the market today, with guaranteed performance
that ensures these facilities lock in positive financial returns. We are very
pleased that our water agency and district customers are seeing returns above
and beyond expectations, delivering added value to the public agencies and
their ratepayers."

Over the last year, SunPower systems at water districts have offset the
production of 46.3 million pounds of carbon dioxide, according to estimates
provided by the U.S. Environmental Protection Agency. This is equivalent to
removing 3,800 cars from California roads, or planting nearly 4,800 acres of
trees.

SunPower has two new water agency projects currently under construction in
California:

  oThe company is building a 922-kilowatt system for Western Municipal Water
    District (Western) at its operations center in Riverside, Western's second
    solar installation since SunPower completed a 1-megawatt system at the
    West Riverside Wastewater Treatment plant, a Western-administrated and
    operated joint powers authority facility, in 2009. The new installation is
    expected to be operational early next year.
  oSunPower is also completing a 1.2-megawatt system for the City of
    Oceanside Water Utilities Department. The system is expected to generate
    the equivalent of 25 to 30 percent of electricity demand at the facility,
    and save more than $1.6 million in electricity costs over the next 20
    years. It will be operational by the end of this year.

Both new systems use the SunPower T0 Tracker, a ground-mounted technology that
rotates the solar panels to follow the sun during the day, increasing energy
capture by up to 25 percent over conventional fixed-tilt systems, while
reducing land use requirements.

The two new systems, which SunPower designed, built and will operate and
maintain, are both financed under power purchase agreements. The public
agencies will buy the electricity at prices that are competitive with retail
rates, benefiting from a long-term hedge against rising power prices. The City
of Oceanside owns the renewable energy credits (RECs) associated with the
solar installation at its facility, while Western Municipal Water District is
not retaining the RECs associated with its new system.

"Based on the quality and reliability of our first SunPower system and the
company's extensive experience with water districts across the state, we were
eager to partner with SunPower on our second solar power system," said Jeff
Sims, deputy general manager, of Western Municipal Water District. "The new
system will generate the equivalent of approximately 75 percent of the total
electricity consumed at our facility, helping to keep rates as low as possible
for our customers."

About SunPower Corp.

SunPower Corp. (NASDAQ: SPWR) designs, manufactures and delivers the highest
efficiency, highest reliability solar panels and systems available today.
Residential, business, government and utility customers rely on the company's
quarter century of experience and guaranteed performance to provide maximum
return on investment throughout the life of the solar system. Headquartered in
San Jose, Calif., SunPower has offices in North America, Europe, Australia,
Africa and Asia. For more information, visit www.sunpowercorp.com.

SunPower is a registered trademark of SunPower Corp. All other trademarks are
the property of their respective owners.

SOURCE SunPower Corp.

Website: http://www.sunpowercorp.com
Contact: Ingrid Ekstrom, iekstrom@sunpowercorp.com, 510-260-8368