I did in San Diego County. I pulled permit. Home had a utility connection and grid tied solar. Utility not involved. Plan approved. Inspector came to verify conduit depths and concrete forms before pouring. After completion, inspector came to verify construction, grounding and electrical connections. Then the system was turned on. I used a master electrician, solar engineer to have plan drawn to NEC and county code. I used all UL listed items and all electrical was done in professional manner.
If you are on a property that has no electrical service, there should be no reason you cannot purchase PV products in the marketplace and provide power to your property. However, in CA, if you are connected to a utility, you cannot disconnect. If the Riverside property has utility available, and a connection is required, get it installed and then just reroute loads to your off grid.
TO ALL DIY'ERS: IF YOU CANNOT DO THE EQUIVALENT WORK TO A HIRED PROFESSIONAL (BY STUDYING, LEARNING, PLANNING, HAVING THE CORRECT TOOLS FOR THE JOB, SOME REAL EXPERIENCES, ASKING QUESTIONS), THEN YOUR PROJECT WILL APPEAR AMATEURISH AND PROBABLY NOT BE WORTH THE TIME YOU SPENT AND THE MONEY YOU SAVED AND THE PROBLEMS YOU WILL HAVE TO JUST HAVE IT DONE RIGHT AND PROPER. KNOW YOUR LIMITS. DO THE THINGS YOU CAN DO, GET PROFESSIONAL HELP WHEN YOU FEEL YOU ARE OUT OF YOUR AREA OF COMFORT.