The breakthrough follows JA Solar's recent progress in high-crystal quality, low dislocation density multi-Si casting and wafering.

SHANGHAI, China, Aug. 1, 2013 -- JA Solar Holdings Co.,

Ltd. (Nasdaq:JASO) ("JA Solar" or the "Company"), one of the world's largest
manufacturers of high-performance solar power products, today announced that
its multi-crystalline silicon ("multi-Si") solar cells have reached an
industry-leading conversion efficiency of 18.3%.

The new level of conversion efficiency, which has been independently
certified by the Yangzhou Opto-Electrical Products Testing Institute,
eclipses that of all previously certified industrial size (156x156 mm2)
multi-Si solar cells. The breakthrough follows JA Solar's recent progress in
high-crystal quality, low dislocation density multi-Si casting and wafering.
JA Solar's R&D and production teams plan to integrate the new technology
into existing manufacturing lines for assembly into modules for commercial
use.

"This latest advance is a real testament to the exceptional R&D work going
on at JA Solar, and another key step in our efforts to meet the growing
demand for high-performance solar power products," said Mr.
Yong Liu, CTO of JA Solar. "The superior conversion efficiency we've
achieved with our multi-Si cells and the rest of our product offering
creates significant value for customers as it increases power generated per
square foot and lowers installation cost per watt."

"These record-breaking results are a testament to the continued leadership
of our R&D team," added by Dr. Wei Shan, chief scientist and general R&D
manager of JA Solar. "We look forward to leveraging our improved multi-Si
technology to meet the needs of our customers and project partners."