JA Solar Holdings Co posted a second-quarter profit and raised its full-year sales forecast.

The Shanghai, China-based company said net income was $28.9 million, or 18 cents per American Depositary share, versus a loss of $28.5 million, or 18 cents per share, a year earlier.

Revenue jumped fourfold to $351 million from a year earlier.

JA Solar expects its full year sales to reach 1.35 gigawatts, up from its earlier forecast of 1.0 GW, as its cell production capacity rose to 1.8 GW by the end of 2010, compared with its previous forecast of 1.5 GW.

Module capacity is expected to reach 500 MW, and wafer capacity 300 MW by the end of the year.

(Reporting by Matt Daily; Editing by Derek Caney)