Tesla Motors, Palo Alto, manufacturer of electric cars
Better Place, Palo Alto, recharging stations for electric cars
Energy efficiency and 'smart grid'
NovaTorque, Sunnyvale, efficient motors
People Power Co., Palo Alto, open-source software to manage the energy use of appliances
eMeter, San Mateo, software for smart-grid data
Silver Spring Networks, Redwood City, hardware and software for smart-grid networks
Trilliant, Redwood City, technology for smart-grid communication
Bloom Energy, Sunnyvale, on-site power generation using fuel cells
Ausra, Mountain View, large-scale solar panels (acquired February 2010 by French nuclear company Areva)
SolFocus, Mountain View, high-efficiency solar cells and advanced optics
Innovalight, Sunnyvale, efficient solar cells
World Centric, Palo Alto, biodegradable containers, utensils
Green building materials
Serious Materials, Sunnyvale, energy-efficient drywall, windows, etc.