appropriate energy savings calculations and represent them to PG&E’s technical reviewers in order to take advantage of this type of energy efficiency incentive. Wineries can start the customized incentive process at no-cost by consulting with their PG&E field representative,whowill explain the resource options available for improving energy efficiency, or by calling the PG&EAgricultural Customer Service Center at 1-877-311-FARM (1-877-311-3276).

PG&E customers and WIES program participants can take advantage of prescriptive rebates from the Ag/ Food Processing Rebate Catalog including:

• Wine tank insulation (rebates increased in October 2009 to $2.25/square foot for indoor tanks, $3/square foot for outdoor tanks-Coastal, and $3.75/square foot for outdoor tanks-Central Valley);
• Strip curtains for walk-in boxes ($3/square foot);
• Pipe insulation for boiler systems (up to $4/linear foot);
• Replacement of HID or incandescent fixtures with fluorescent fixtures (up to $125/fixture);
• Replace T12 fixtureswith T5 or T8 (up to $7.50/lamp);
• Occupancy sensors (up to $44/sensor);
• Efficient evaporator fan motor ($20/motor);
• Evaporator fan controller for walk-in coolers ($75/controller);
• Steam or water process boiler ($2/MBtuh);
• Insulation for bare suction lines ($1/linear foot).

Retrofit projects that qualify for PG&E customized incentives include:

• Replacing old chillerswith energy efficient models that include motor controls to automatically ramp up and down based on refrigeration need;
• Installing variable frequency drives on glycol pumps and condenser fans;
• Installing controls to cycle evaporator fans;
• Installing controls for floating head pressure and suction pressure;
• Installing energy-efficientmotors;
• Replacing air cooled condensers with evaporatively cooled condensers;
• Efficient aerators for wastewater ponds;
• Dissolved oxygen sensors for wastewater ponds;

Jordan Winery on the two doors replaced in 2009 of $2,117, and the estimated reduction in energy consumption by the winery is 15,330 kWh per year.

Spence and his team also made small efficiency upgrades, such as LED lighting in offices and a new energy-efficient refrigerator in the winery’s kitchen. Restrooms were retrofit with more efficient fluorescent lighting and motion-sensor faucets in 2009.

Pilek explains that retrofit rebates fall into two categories, prescriptive rebates and customized incentives. “Rebates are simple — where enough field data has been collected over time for a certain type of energy efficiency project, a generic energy savings can be assigned and a standard cash

amount is provided,” he says. “A catalog listing the rebates available is on the PG&E website and includes many types of projects.

“Customized incentives are more complex, as each winery’s potential energy reduction varies based on its equipment and operating conditions. Where catalog rebates are too narrowly defined or do not address thewinery or vineyard’s specific energy savings opportunities, a customized incentive can be calculated based on the specific equipment in use, hours of operation, and other factors. Most wineries are not aware of this path, and assume if it is not in the catalog, no rebate is available.”

The customized incentive option involves pre-project discussions with PG&E or PG&E partners on the energy saving options available, documenting before and after conditions, development and review of energy savings calculations, and in many cases, field measurements. With careful management, customized incentives give wineries access to a broader variety of energy efficiency projects that are eligible for rebates.

Typically a winery would need to hire an engineering firm to help develop the