The world's largest retailer Walmart has finished the
rooftop solar installation at its San Diego store, the 100th project completed
so far in California.
Last year, Walmart committed to extending its rooftop
solar portfolio to more than 75 percent of its California stores (approximately
130) by the end of 2013.
Installer SolarCity, which handled the San Diego project,
is handling installation, management and maintenance for 70 of the 100
completed projects. Each project creates an average of 48 contract solar jobs,
This latest installation raises Walmart's solar capacity
to 62 megawatts (MWs) across approximately 150 stores; it could have up to 90
MWs across 1,000 locations by the end of 2020, reports Bloomberg.
That means almost one-quarter of Wal-Mart's US stores
would use solar eight years from now.
In California, the solar installations will handle 10-30%
of each facility's total electricity needs. The combined output of the systems
is estimated at 70 million kilowatt-hours (kWh) annually.
One of Walmart's three overriding sustainability goals is
to be supplied by 100% renewable energy, although it doesn't set a time frame
for when that should happen.
Right now, the retailer gets about 4 percent of its power
from renewable sources, reports Bloomberg.
Walmart began piloting solar installations in 2008,
targeting states where utility rates are particularly high such as California,
Hawaii, Puerto Rico, Ohio and Connecticut.
The decision about whether to install renewable energy is
made on a store by stare basis, Marty Gilbert, director of energy at the
Bentonville, Arkansas-based company, told Bloomberg.
“The more we get involved and commit to volume, the more
the prices come down for the technology,” says Gilbert. “Prices for solar
panels, fuel cells, wind turbines to some degree, they are all approaching grid
Walmart is also installing fuel cells and wind turbines,
including a 1.1-MW turbine scheduled to be operational Red Bluff, California,
by the end of August.
Aside from its renewable energy projects, Walmart has
moved aggressively to promote sustainable business practices across the retail
In August 2011, the retailer took preliminary steps toward measuring
produce suppliers. Last year, it also implemented a new waste reduction
strategy across 4,400 US sites. The California pilot sites for the new policy
were able to reduce landfill waste by more than 80%.