AGREEMENT TO FILE JOINT SCHEDULE 13D
CUSIP No. ▇▇▇▇▇▇▇▇▇
Each of the undersigned, being a record owner or “beneficial owner” of the common stock of
Power One, Inc. (“Common Stock”), hereby agrees to jointly file a Schedule 13D with respect to
their respective holdings of the Common Stock and to include this agreement as an exhibit to such
Schedule 13D.
IN WITNESS WHEREOF, each of the undersigned has executed and delivered this agreement as of
the 17th day of March, 2008.
| /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇ | ||||
| ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, as attorney in fact for ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ Trust No. One, ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ Children’s Trust, ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ Trust, ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ Trust, ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ Trust, ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ Trust, ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇, and ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇, ▇▇. |
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