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ZBB Energy Ships Four Complete ZBB EnerSystems to Fast-Growing Global Customer Base

MILWAUKEE, WI — (Marketwire) — 04/23/12 — ZBB Energy Corp. (NYSE Amex: ZBB), a distinct leader in energy storage and power control platforms that integrate renewable and conventional sources, has shipped four additional ZBB EnerSystems to customers around the world since its inaugural shipment announced mid-February.

Manufactured at the company-s Menomonee Falls, Wisconsin facility, the ZBB EnerSystems were comprised of a 25 KW ZBB EnerSection power and energy control center (ETL certified to UL 1741) combined with a ZBB EnerStore next generation proprietary flow battery system.

Supporting components included proprietary converters or “buckets” that allow various battery modules and energy sources — particularly renewables like solar or wind — to deliver power into the EnerSystem. Also included were Grid Interconnect Devices (GID) for switching the system on and off the grid.

While based on the same platform technology, each system was custom configured via software to the customers- particular application, demonstrating the company-s ability to meet different customer requirements in an efficient, low-cost manufacturing environment.

A ZBB EnerSystem shipped to China included these components:

ZBB EnerSection

A photovoltaic (PV) bucket

ZBB EnerStore

GID

A system shipped to a major high-tech U.S. based company for testing and demonstration included:

ZBB EnerSection

Two PV buckets

ZBB EnerStore

GID

A third system shipped to another high-tech U.S. based company for testing and demonstration included:

ZBB EnerSection

ZBB EnerStore

One battery bucket for connecting a non-ZBB battery module to the ZBB EnerSection

One PV bucket

GID

The fourth system was customized to provide energy management in a hybrid of wind and solar for another U.S. customer, which included:

ZBB EnerSection

ZBB EnerStore

One wind bucket

One PV bucket

The inaugural shipment announced in February that was sent to China for testing by a key prospective customer included:

ZBB EnerSection

ZBB EnerStore

One Rectifier bucket for testing the system

One PV bucket

GID

“These various configurations demonstrate how quickly and easily ZBB can manufacture and customize a solution to a customer-s particular requirements,” stated Chuck Stankiewicz, executive vice president of operations. “While we-re still in the higher cost startup stage of pilot and pre-production manufacturing, including continued product development to achieve optimal product cost, our initial manufacturing process proved highly efficient as designed. We believe our current manufacturing platform will support more than $50 million in annual sales. Our current product backlog of more than $5 million provides us a great start toward achieving full plant capacity.”

ZBB also produced and shipped to its China JV Wuhu factory the majority of components for the assembly of 10 EnerStores. Meanwhile, ETL certification to UL 1741 of the ZBB EnerSection 60 KW and 125 KW systems remain on schedule for completion by the end of the current quarter.

Pictures of the Menomonee Falls manufacturing facility can be viewed on the company-s website at .

The company plans to provide more details about this recent progress in its upcoming fiscal third quarter earnings call scheduled for May 7, 2012.

ZBB Energy Corporation (NYSE Amex: ZBB) designs, develops, and manufactures advanced energy storage, power electronic systems, and engineered custom and semi-custom products targeted at the growing global need for distributed renewable energy, energy efficiency, power quality, and grid modernization. ZBB and its power electronics subsidiary, Tier Electronics, LLC, have developed a portfolio of integrated power management platforms that combine advanced power and energy controls plus energy storage to optimize renewable energy sources and conventional power inputs whether connected to the grid or not. Tier Electronics participates in the energy efficiency markets through their hybrid vehicle control systems, and power quality markets with their line of regulation solutions. Together, these platforms solve a wide range of electrical system challenges in global markets for utility, governmental, commercial, industrial and residential end customers. Founded in 1998, ZBB-s platforms ensure optimal efficiencies today, while offering the flexibility to adapt and scale to future requirements. ZBB-s corporate offices and production facilities are located in Menomonee Falls, WI, USA with offices also located in Perth, Western Australia. For more information, visit:

Certain statements made in this press release contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended that are intended to be covered by the “safe harbor” created by those sections. Forward-looking statements, which are based on certain assumptions and describe our future plans, strategies and expectations, can generally be identified by the use of forward-looking terms such as “believe,” “expect,” “may,” “will,” “should,” “could,” “seek,” “intend,” “plan,” “estimate,” “anticipate” or other comparable terms. Forward-looking statements in this press release may address the following subjects among others: statements regarding the sufficiency of our capital resources, expected operating losses, expected revenues, expected expenses and our expectations concerning our business strategy. Forward-looking statements involve inherent risks and uncertainties which could cause actual results to differ materially from those in the forward-looking statements, as a result of various factors including those risks and uncertainties described in the Risk Factors and in Management-s Discussion and Analysis of Financial Condition and Results of Operations sections of our most recently filed Annual Report on Form 10-K and our subsequently filed Quarterly Reports on Form 10-Q. We urge you to consider those risks and uncertainties in evaluating our forward-looking statements. We caution readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date made. Except as otherwise required by the federal securities laws, we disclaim any obligation or undertaking to publicly release any updates or revisions to any forward-looking statement contained herein (or elsewhere) to reflect any change in our expectations with regard thereto or any change in events, conditions or circumstances on which any such statement is based.

Dilek Wagner
Financial Reporting Analyst
ZBB Energy Corporation

Tel 262-253-9800 x122

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Justin Vaicek

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