First Solar, which manufactures and sells low-cost, thin-film solar panels to German resellers, increased the size of its offering and priced above its proposed range last night. The Phoenix-based company priced 20 million shares (up from 17.5 million) at $20 last night, 11% above its proposed $17-$19 range. The stock is expected to begin trading on the NASDAQ on Friday morning under the ticker FSLR. Credit Suisse and Morgan Stanley managed the deal.