I operate my business out of the house. Can I claim my 30% federal solar rebate AND also get by with more business deductions and claim the 1099 contractor (making him fill out W9) as a business expense on top of that? What is my best bang for the buck. The project cost $10k, and I know I'm getting a minimum of $3k off my FED taxes next year form rebate. Can claim more deductions in some way (and how?) since it the panels are used primarily for my LLC?
Typically you can only claim as business deductions those expenses which strictly relate to your business. In some cases, if you have a dedicated home office in your house, you can specify that expenses related to this space (furniture, etc.) are business expenses because it is a dedicated space. For example, I know of someone in sports broadcasting who claimed several TVs as a business expense, but these are for a room in his house that he uses only for watching games related to his work responsibilities, and never for entertaining, having friends over, etc.
I think it will be difficult for you to count any portion of this type of installation as a business expense as it would relate to both your business as well as your residence. If you intend to try to get this deducted, I would strongly recommend consulting a CPA or tax attorney first. I think it will be difficult to prove that the only benefit is to your LLC if your electricity bills/credits are co-mingled with those for your residence.
Best of luck!