That's a bummer. They had to change our original design because they said that the roof on our house was only going to last 8 more years. I was ready to opt out, but since the engineers were already at our house, they decided to check out my new garage and found a way to put it on there. It all worked out at the end. That seems like a huge drop in the system output though to go from 7.4kw to 2.9. Did they say what the percentage of your average usage the 2.9kw system is compared to the 7.4?