Solar racking companies battled it out on the floor of Solar Power International (SPI) in late October, demonstrating new system improvements to shave critical minutes off installation time and pennies off the per-watt cost. While many basic ground, flat roof and sloped roof mounting systems feature dramatically reduced costs, the competition is still on: exhibitor display signs touting cost per watt were prevalent, and several portended to be easily breaking the single-digit cents range with their offerings.