Get 30% back from uncle Sam
On all your system parts and labor until 2021. Some states have additional rebates on top of that, and all the info is here.
DSIRE is the most comprehensive source of information on incentives and policies that support renewables and energy efficiency in the United States.
My personal favorite for over 40 years.
HOME DIY SOLAR, ORGANIC GARDENING, HOMESTEADING & LIVESTOCK, REAL FOOD NATURAL HEALTH RENEWABLE ENERGY, GREEN HOMES, NATURE & ENVIRONMENT, GREEN TRANSPORTATION
Plans, tools and information to help you build renewable energy and conservation projects. Hundreds of projects -- from changing a light bulb to building a solar homes. Design information and tools for building renewable energy projects. An Experimental section for backyard inventors.
Nothing For Sale here -- just free ideas, plans, and information.
I really like Bob and owe him many thanks for all his knowledge. A retired electrical engineer very compassionate about RV solar, who was off grid by 2003. This is aimed at the "frustrated, technologically challenged and budget minded RV owner who needs basic education about battery supplied electrical power."
Jack Mayer wrote a book about RV Solar and it's available free on his web site. Lots of technical advice, wiring diagrams, etc.
FreeSunPower.com provides free beginner and advanced tutorials for setting up a solar power system for producing free electricity from the sun. The tutorials cover Solar Panels, Charge Controllers, Power Inverters, Storage Batteries, AC Generators, Wires & Cables, Meters & Monitors, and more. Complete system wiring diagram examples plus interactive online design tools are also featured with a point and click interface.