Elon Musk's SolarCity now expects solar panel installations in 2015 to fall between 920MW and 1GW. For 2014, it estimates deployments will end up between 505 and 520MW, which is about half of what it previously thought it would build. SolarCity said it brought in $58.3 million in revenue in the third quarter. That's below what was expected. However, its quarterly loss was only 75 cents a share when people were ready to see a loss of more than a dollar. SolarCity is spending aggressively in the hopes of dominating the crowded residential solar panel arena. It wants to get as many customer signups and install as many solar panels as possible before it loses a key federal tax credit in 2017.