SHAREHOLDER ALERT: Brower Piven Encourages Investors Who Have Losses in Excess of $50,000 From Investment in Active Power Inc.

SHAREHOLDER ALERT: Brower Piven Encourages Investors Who Have Losses in Excess
of $50,000 From Investment in Active Power Inc. to Contact Brower Piven Before
the November 12, 2013 Lead Plaintiff Deadline -- ACPW

STEVENSON, Md., Sept. 11, 2013 (GLOBE NEWSWIRE) -- Brower Piven, A
Professional Corporation announces that a class action lawsuit has been
commenced in the United States District Court for the Western District of
Texas on behalf of purchasers of Active Power Inc. ("Active Power" or the
"Company") (Nasdaq:ACPW) common stock during the period between April 30, 2013
and September 5, 2013, inclusive (the "Class Period").

If you have suffered a net loss from investment in Active Power Inc. common
stock purchased on or after April 30, 2013, and held through the revelation of
negative information on September 5, 2013, as described below, at no cost to
you, you may obtain additional information about this lawsuit and your ability
to become a lead plaintiff by contacting Brower Piven at,
by email at, by calling 410/415-6616, or at Brower
Piven, A Professional Corporation, 1925 Old Valley Road, Stevenson, Maryland
21153. Attorneys at Brower Piven have combined experience litigating
securities and class action cases of over 60 years.

No class has yet been certified in the above action. Members of the Class will
be represented by the lead plaintiff and counsel chosen by the lead
plaintiff. If you wish to choose counsel to represent you and the Class, you
must apply to be appointed lead plaintiff no later than November 12, 2013 and
be selected by the Court. The lead plaintiff will direct the litigation and
participate in important decisions including whether to accept a settlement
and how much of a settlement to accept for the Class in the action. The lead
plaintiff will be selected from among applicants claiming the largest loss
from investment in Company stock during the Class Period.

The complaint accuses the defendants of violations of the Securities Exchange
Act of 1934 by virtue of the defendants issuing materially false and
misleading statements during the Class Period concerning the Company's
strategic distribution partnership with Digital China Information Service
Company Limited. According to the complaint, following the Company's September
5, 2013 disclosure that it was retracting its 2013 guidance and that the
Company had announced in error that it had entered into a partnership
agreement with Digital China Information Service Company Limited, the value of
Active Power shares declined significantly.

If you choose to retain counsel, you may retain Brower Piven without financial
obligation or cost to you, or you may retain other counsel of your choice.
You need take no action at this time to be a member of the class.

CONTACT: Charles J. Piven
         Brower Piven, A Professional Corporation
         Stevenson, Maryland
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