From today's announcement:
Manufacturing update - Flextronics (Flex)
The transition of complete manufacturing to Flex has progressed smoothly and is now at the stage where production has resumed on a fully outsourced basis, as planned. All issues and feedback identified from in field installations and trials have been incorporated into these products. The supply chain management of components and the manufacturing is now entirely with Flex. With a high focus on quality and post pilot-run analysis, the introductory phase has run about 4 weeks behind our original schedule.
Residential Product Progress
With the resumption of battery manufacturing with Flex being approximately 4 weeks behind schedule (as mentioned above), the first shipment of ZCell-ready batteries are now expected to arrive in Australia in late July 2016 for pre-delivery testing prior to commencing deliveries to installers.
And still no mention of pre-order numbers or volume of batteries being shipped in first batch...
