The resources listed below offer additional information on energy efficiency and solar topics. 

Berkeley Energy Efficiency and Solar Information

• Berkeley Solar Map – estimate your property’s solar potential
• Solar Project Calculator – estimate Costs, Financing, and Pay Back Periods 
• Berkeley Office of Energy and Sustainable Development – permitting information and project guides 

PG&E

Savings Tips, Energy Analyzer, and Energy Efficiency Rebates and Incentives for: 

• Your Home
• Your Business

Energy Efficiency

• U.S. Department of Energy – energy efficienct practices and advice
  
• ENERGY STAR – energy efficient appliances and practices
• Rising Sun Energy Center – a non profit residential energy efficiency organization that offers free energy audits through the California Youth Energy Services
  
• CESC SmartLights – a non-profit commercial energy efficiency progrm that offers free energy audits

Solar - General

• In My Back Yard – a tool to estimate your property's solar potentialfrom the National Renewable Energy Lab
  
• A Solar Glossary – from the U.S. Department of Energy
• CalSEIA – a non-profit organization representing the California solar industry
• NorCal Solar – a non-profit educational organization in Northern California

Solar Hot Water

• U.S. Department of Energy – solar water heating information
  
• U.S. Department of Energy – save on your energy bill with solar hot water
• The Solar Rating Certification Corporation – a certification requirement for solar hot water systems to qualify for a FITC
• A Solar Water Heating Pilot Program in San Diego – a pilot program from the California Center for Sustainable Energy

Solar Electric

• U.S. Department of Energy – solar electric and photovoltaics information
  
• U.S. Department of Energy – save on your energy bill with solar electric
  
• California Solar Initiative – California solar program and rebate information

Other Project Planning

• DSIRE Database – national, state, local, and utility rebate, incentive, and tax credit program
• California Contractors License Board – check to make sure contractor license numbers are active
• California Building Performance Contractors Association – California contractors certified in energy efficiency and whole building performance
• California Solar Initiative Installer/Contractor/Retailer Database – find solar electric companies eligible to process CSI rebates
• CalSEIA Solar Expert – find solar hot water and electric companies