We have a 26 panel array using Solar World 295 watt modules (7.67 KW), with Enphase S280 Micro- inverters in portrait on the South and West faces of the house roof. The panels are mounted on a site-constructed SunModo aluminum racking system and Grid Tied. (Shout out to West Seattle Natural Energy for help with the installation!)
The system connects to our existing panel through a new breaker box, and is set up in such a way that power goes back to the city if too much is generated. Ideally, the panels let us break even annually on electrical use, which means a lot of energy savings for 12 people living in a three story house.
Both systems were painless to install, and both contractors that helped us were great. The initial costs were not low, but the cost saving over time makes up for it. Minimizing the environmental impact is something significant to consider.
Feel free to get in touch with us if you are interested in learning more.