Exhibit 10.20

                               ENOVA SYSTEMS, INC.
                          REGISTRATION RIGHTS AGREEMENT

         THIS  REGISTRATION   RIGHTS  AGREEMENT  (this   "Agreement")  is  dated
effective  as of March  30,  2004  (the  "Effective  Date") by and among (i) the
holders  of certain  common  stock of the  Company  listed on Exhibit A attached
hereto  who are  parties  along  with the  Company  to  certain  Stock  Purchase
Agreements (or  counterparts  thereto) (the "Original  Holders") dated as of the
Effective Date (collectively,  the "Stock Purchase  Agreement"),  and each other
Person  (defined  below)  who  subsequently  becomes  a party to this  Agreement
pursuant to Section 8(a) hereof (each such Original  Holder and other Person,  a
"Holder" and,  collectively,  the  "Holders")  and (ii) Enova  Systems,  Inc., a
California  corporation (the "Company").

                                    RECITALS
                                    --------

         WHEREAS,  each of the Holders have  purchased  shares of the  Company's
common stock  pursuant to the Stock  Purchase  Agreement  which provides for the
granting of certain registration rights;

                                    AGREEMENT
                                    ---------

         NOW, THEREFORE,  in consideration of the mutual agreements,  covenants,
representations and warranties contained in this Agreement,  the Holders and the
Company hereby agree as follows:

         1.       Definitions.

                  "Commission"  means the Securities and Exchange  Commission or
any other Federal agency at the time administering the Securities Act.

                  "Common Stock" means any and all (i) common stock of the
Company held by the Holders and issued pursuant to the Stock Purchase Agreement
(the "Stock"); (ii) common stock of the Company issued as a dividend or other
distribution with respect to or in replacement of the Stock, and (iii) any
common stock issued in any combination or subdivision of the Stock. In
determining the amount of Common Stock held by any Person, the sum of (i), (ii)
and (iii) shall be used and a Person shall be deemed to "hold" all Common Stock
then held by such Person.

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended, or any similar Federal statue and the rules and regulations of the
Commission thereunder all as the same shall be in effect at the time.

                  "Person"   means   any   individual,    corporation,    trust,
partnership, association, or other entity.

                  "Registrable Shares" means the Common Stock.

                  "Registration  Statement" means the registration statement and
any additional registration statements filed with the Commission as contemplated
by  Section  2,  including  (in  each  case)  any  prospectus,   amendments  and
supplements to such  registration  statement or  Prospectus,  including pre- and
post- effective amendments,  all exhibits thereto, and all material incorporated
by reference in such registration statement or statements.

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                  "Securities Act" means the Securities Act of 1933, as amended,
or any similar Federal statute and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

         2.       Registration Procedures and Expenses.  The Company shall

                  (a)  use  its  reasonable  efforts,   subject  to  receipt  of
necessary information from the Original Holders, to cause to become effective no
later  than one  hundred  eighty  (180)  days  following  the  Effective  Date a
Registration Statement on Form S-1in order to register with the Commission under
the Securities Act sales by the Original Holders under the Securities Act of all
of the Registrable Shares held by the Original Holders;

                  (b)  use  its  reasonable  efforts,   subject  to  receipt  of
necessary  information  from such  other  Persons  who  become  parties  to this
Agreement  after the  Effective  Date,  within  one  hundred  eighty  (180) days
following  the closing  date of the sale of the  Company's  common stock to each
such other  Person(s) who become a party to this  Agreement  pursuant to Section
8(a)  hereof,  to cause an  amendment  to the  Registration  Statement to become
effective in order to register with the  Commission  under the  Securities Act a
sale by such other  Person(s) all of the  Registrable  Shares held by such other
Person;

                  (c) promptly prepare and file with the Commission, and deliver
to each Holder,  such amendments and supplements to such Registration  Statement
and the prospectus used in connection therewith as may be necessary to keep such
Registration  Statement  effective  and to  comply  with the  provisions  of the
Securities Act with respect to the sale or other  disposition of all Registrable
Shares until termination of such obligation as provided in Section 6 below;

                  (d)   furnish  to  each   Holder  such  number  of  copies  of
prospectuses,   including  preliminary  prospectuses,  in  conformity  with  the
requirements  of the  Securities  Act, in order to facilitate the public sale or
other disposition of all or any of the Registrable Shares by the Holders;

                  (e) use its reasonable efforts to cause all Registrable Shares
to  be  listed  on  each  securities  exchange,   quotation  system,  market  or
over-the-counter  bulletin  board,  if any, on which  equity  securities  by the
Company are then listed or traded;

                  (f) bear all  expenses  in  connection  with  this  Agreement,
including,  without limitation,  all registration and filing fees (including all
expenses  incident  to  filing  with  the  NASD),  printing  expenses,  fees and
disbursements of counsel for company, expenses of any special audits incident to
or  required  by any  such  registration  and  expenses  of  complying  with the
securities  or blue  sky  laws of any  jurisdiction,  other  than  (i)  fees and
expenses,  if any, of counsel or other  advisors to the Holders and (ii) brokers
commissions, discounts or fees and transfer taxes; and

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         Notwithstanding  anything to the contrary  expressed or implied herein,
if a  registration  statement  on Form  S-3,  or any  substitute  form,  becomes
available for  registration of the Registrable  Shares,  the Company may instead
prepare and file with the Commission a registration statement on Form S-3 at any
time in order to register the  Registrable  Shares under the  Securities Act and
such registration statement will be a "Registration  Statement" for the purposes
of this Agreement.

         3.       Indemnification

                  (a) The Company  agrees to indemnify  and hold  harmless  each
Holder, such Holder's directors, officers, partners, agents, each underwriter of
Registered Shares, and each Person who controls any of the foregoing (within the
meaning of Section 15 of the Securities Act) (each an "Indemnified  Party") from
and against any losses, claims, damages or liabilities to which such Indemnified
Party may become subject (under the Securities Act or otherwise) insofar as such
losses,  claims,  damages or  liabilities  (or actions or proceedings in respect
thereof)  arise  out  of,  or  are  based  upon,  any  untrue  statement  in the
Registration  Statement,  or arise out of any  failure by the Company to fulfill
any  undertaking  included  in the  Registration  Statement  or arise  under the
Securities  Act or any other  statute  or at  common  law and the  Company  will
reimburse  such  Indemnified  Party for any  reasonable  legal or other expenses
reasonably incurred in investigating,  defending or preparing to defend any such
action,  proceeding or claim;  provided,  however, that the Company shall not be
liable in any such case to the extent that such loss, claim, damage or liability
arises out of, or is based upon, an untrue  statement made in such  Registration
Statement in reliance upon and in conformity with written information  furnished
to the Company by or on behalf of such Indemnified Party specifically for use in
preparation  of the  Registration  Statement  or the  failure of such  Holder to
comply  with  the  covenants  and  agreements  contained  in  Section  4  hereof
respecting  the sale of the  Registrable  Shares or any untrue  statement in any
prospectus that is corrected in any subsequent  prospectus that was delivered to
the Holder prior to the pertinent sale or sales by the Holder.

                  (b)  Each  Holder,   severally  and  not  jointly,  agrees  to
indemnify and hold  harmless the Company (and each person,  if any, who controls
the Company within the meaning of Section 15 of the Securities Act, each officer
of the Company who signs the  Registration  Statement  and each  director of the
Company) from and against any losses,  claims,  damages or  liabilities to which
the Company (or any such  officer,  director or  controlling  person) may become
subject (under the Securities Act or otherwise), insofar as such losses, claims,
damages or liabilities (or actions or proceedings in respect  thereof) arise out
of, or are based upon,  any failure to comply with the covenants and  agreements
contained in Section 5 hereof respecting sale of the Registrable  Shares, or any
untrue statement  contained in the Registration  Statement if, but only if, such
untrue  statement  was made in  reliance  upon and in  conformity  with  written
information  furnished  by or on behalf of such Holder  specifically  for use in

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preparation  of the  Registration  Statement and such Holder will  reimburse the
Company (or such officer,  director or controlling  person), as the case may be,
for any legal or other expenses reasonably incurred in investigating,  defending
or preparing to defend any such action, proceeding or claim; provided that in no
event  shall any  indemnity  by a Holder  under  this  Section 3 exceed  the net
proceeds received by such Holder from the sale of the Registrable Shares covered
by such Registration Statement.

                  (c)  Promptly  after  receipt by any  indemnified  person of a
notice of a claim or the  beginning of any action in respect of which  indemnity
is to be sought against an indemnifying  person pursuant to this Section 3, such
indemnified person shall notify the indemnifying person in writing of such claim
or  of  the  commencement  of  such  action,  and,  subject  to  the  provisions
hereinafter  stated,  in case  any  such  action  shall be  brought  against  an
indemnified  person  and such  indemnifying  person  shall  have  been  notified
thereof, such indemnifying person shall be entitled to participate therein, and,
to the  extent it shall  wish,  to assume  the  defense  thereof,  with  counsel
reasonably  satisfactory  to such  indemnified  person.  After  notice  from the
indemnifying  person to such  indemnified  person of its  election to assume the
defense  thereof,   such  indemnifying  person  shall  not  be  liable  to  such
indemnified  person  for  any  legal  expenses  subsequently  incurred  by  such
indemnified  person in connection with the defense thereof;  provided,  however,
that if there  exists or shall exist a conflict  of interest  that would make it
inappropriate, in the opinion of counsel to the indemnified person, for the same
counsel to represent both the indemnified person and such indemnifying person or
any affiliate or associate thereof,  the indemnified person shall be entitled to
retain  its  own  counsel  at  the  expense  of  such  indemnified   person.  No
indemnifying party in the defense of any such claim or litigation shall,  except
with the consent of each indemnified party,  consent to entry of any judgment or
enter into any settlement that does not include as an unconditional term thereof
the giving by the claimant or plaintiff to such  indemnified  party of a release
from all liability in respect of such claim or  litigation,  and no  indemnified
party shall  consent to entry of any judgment or settle such claim or litigation
without the prior written consent of the indemnifying party.

                  (d) If the  indemnification  provided for in this Section 3 is
held by a court of competent  jurisdiction  to be  unavailable to an indemnified
party with respect to any loss, liability, claim, damage, or expense referred to
therein,  then the indemnifying  party, in lieu of indemnifying such indemnified
party  hereunder,  shall  contribute  to the  amount  paid  or  payable  by such
indemnified party as a result of such loss, liability, claim, damage, or expense
in such  proportion  as is  appropriate  to reflect  the  relative  fault of the
indemnifying  party on the one hand and of the indemnified party on the other in
connection  with  the  statements  or  omissions  that  resulted  in such  loss,
liability,  claim,  damage,  or expense as well as any other relevant  equitable
considerations.  The  relative  fault  of  the  indemnifying  party  and  of the
indemnified  party shall be  determined  by reference  to,  among other  things,
whether the untrue or alleged untrue  statement of material fact or the omission
to state a material  fact relates to  information  supplied by the  indemnifying

                                     - 4 -

party or by the indemnified party and the parties'  relative intent,  knowledge,
access to  information,  and opportunity to correct or prevent such statement or
omission. No Person guilty of fraudulent  misrepresentation  (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to  contribution  from
any   Person  who  was  not   guilty  of  such   fraudulent   misrepresentation.
Notwithstanding anything to the contrary contained herein, any contribution by a
Holder hereunder shall not exceed the net proceeds  received by such Holder from
the sale of the Registrable Shares covered by the Registration Statement.

         4.       Transfer of Shares  After  Registration;  Notice.  Each Holder
hereby covenants with the Company not to make any sale of the Registrable Shares
after  registration   without   effectively   causing  the  prospectus  delivery
requirement under the Securities Act to be satisfied.  Each Holder  acknowledges
that there may be times when the Company must suspend the use of the  prospectus
forming a part of the Registration  Statement until such time as an amendment to
the Registration  Statement has been filed by the Company and declared effective
by the  Commission,  or until such time as the Company has filed an  appropriate
report with the  Commission  pursuant to the Exchange  Act.  Each Holder  hereby
covenants  that it  will  not  sell  any  Registrable  Shares  pursuant  to said
prospectus  during the period  commencing at the time at which the Company gives
the Holder prior written notice of the suspension of the use of said  prospectus
and ending at the time the Company  gives the Holder prior  written  notice that
the Holder may thereafter  effect sales pursuant to said  prospectus;  provided,
however, that no such postponements shall be permitted for more than one hundred
eighty (180) days in the  aggregate  during any 12 month  period.  The foregoing
provisions of this Section 4 shall in no manner diminish or otherwise impair the
Company's obligations under Section 2.

         5.       Reporting Requirements.

                  (a) The Company  agrees  during the term of this  Agreement to
use its reasonable efforts to:

                           (i) make and keep public  information  available,  as
those terms are understood and defined in Rule 144 under the Securities Act;

                           (ii) file with the  Commission in a timely manner all
reports and other documents required of the Company under the Securities Act and
the Exchange Act; and

                           (iii) so long as any of the Holders  own  Registrable
Shares, to furnish to the Holders forthwith upon request (1) a written statement
by the Company as to whether it complies with the reporting requirements of said
Rule 144, the  Securities Act and the Exchange Act, or whether it qualifies as a
registrant whose securities may be resold pursuant to Commission Form S-3, (2) a
copy of the most recent annual or quarterly report of the Company and such other
reports and documents so filed by the Company, and (3) such other information as

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may be reasonably requested in availing the Holders of any rule or regulation of
the Commission that would permit the selling of the  Registrable  Shares without
registration.

         6.       Termination  of  Obligations.  The  obligations of the Company
pursuant to Sections 2 through 5 hereof with  respect to any Holder  shall cease
and  terminate  upon  the  earlier  to  occur  of (i)  such  time  as all of the
Registrable  Shares  have been resold by such Holder or (ii) such time as all of
the Registrable Shares held by such Holder may be sold during any 3 month period
pursuant  to  Rule  144,  including  Rule  144  (k) or  (iii)  upon  the  second
anniversary date of the Effective Date.

         7.       Assignability of Registration  Rights. The Registration rights
set forth in  Section 2 are  assignable  only to  assignees  acquiring  all of a
Holder's  Registrable  Shares held at the time of assignment.  Provided  further
that the Company shall not be obligated to file any post-effective  amendment to
the Registration  Statement solely for the purpose of adding such assignee(s) to
the  Registration  Statement  more than once  during any  consecutive  six-month
period.

         8.       Miscellaneous.

                  (a) Additional Parties/Consent to Amendments.  Each Person who
enters into a Stock Purchase  Agreement on, or before,  July 31, 2004,  shall be
deemed a Holder under this Agreement  accorded the registration  rights afforded
to all  Holders  as  contemplated  herein.  In  addition,  except  as  otherwise
expressly  provided  herein,  the  provisions  of this  Agreement may be amended
and/or  the  provisions  hereof  waived,  only with the  written  consent of the
Company  and  of  Holders  holding  fifty-one  percent  (51%)  or  more  of  the
Registrable  Shares  at the  time  held  by  all  Holders.  Notwithstanding  the
foregoing,  no  amendment  or  waiver  may  affect  any  Holder  in  any  manner
differently  from any other  Holder  without the  written  consent of such first
mentioned Holder. No course of dealing between the Company and any Holder or any
delay in  exercising  any rights  hereunder or under the  Company's  Articles of
Incorporation will operate as a waiver of any rights of any such Holder.

                  (b)  Successors  and Assigns.  All  covenants  and  agreements
contained in this  Agreement by or on behalf of any of the parties  hereto shall
bind and inure to the benefit of the  respective  successors  and assigns of the
parties hereto whether so expressed or not.

                  (c)  Severability.  Each provision of this Agreement  shall be
interpreted  in such manner as to be effective and valid under  applicable  law,
but if any  provision of this  Agreement is held to be  prohibited by or invalid
under  applicable law, such provision shall be ineffective only to the extent of
such  prohibition  or  invalidity,  without  invalidating  the remainder of this
Agreement.

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                  (d)  Counterparts.  This  Agreement  may be executed in two or
more counterparts, any one of which need not contain the signatures of more than
one party,  but all such  counterparts  when taken together shall constitute one
and the same Agreement.

                  (e) Descriptive  Headings.  The  descriptive  headings of this
Agreement are inserted for convenience only and do not constitute a part of this
Agreement.

                  (f)  Notices.   All  notices,   demands,   consents  or  other
communications  required or permitted hereunder shall be in writing and shall be
deemed to have been given (i) when personally delivered, (ii) three (3) business
days following  mailing thereof,  if sent by first class certified mail,  return
receipt  requested,  or (iii) the next  business day following  transmission  or
mailing,  if sent by facsimile  (receipt confirmed and followed up by one of the
other delivery methods discussed herein as well),  Express Mail, Federal Express
or similar service, addressed as follows:

         If to any Holder:         To the applicable addresses set forth in the
                                   Stock Purchase Agreement

         If to the Company:        Enova Systems, Inc.
                                   19850 South Magellan Drive
                                   Torrance, CA 90502
                                   Attn:  Carl Perry

Any party  may  change  its  address  for  purposes  hereof  by notice  given in
accordance with this Section 3.f to each of the other parties hereto.

                  (g) Governing  Law. The  validity,  meaning and effect of this
Agreement,  and all  amendments  and  supplements  hereto  and all  waivers  and
consents  hereunder,  shall  be  determined  in  accordance  with  the  laws  of
California, applicable to contracts made and to be performed entirely within the
State of California. Each of the parties hereby submits to personal jurisdiction
in Los Angeles County, State of California solely for purposes of this Agreement
and waives any objection as to venue in such jurisdiction.

                  (h) Schedules and Exhibits.  All schedules and exhibits are an
integral part of this Agreement.

                  (i)  Litigation  Costs.  Subject  to  Section  3, if any legal
action or any arbitration or other  proceeding is brought for the enforcement of
this Agreement,  or because of a dispute,  breach, default, or misrepresentation
in connection  with any of the provisions of this  Agreement,  the successful or
prevailing party or parties shall be entitled to recover  reasonable  attorneys'
fees and other costs incurred in that action or  proceeding,  in addition to any
other relief to which it or they may be entitled, if and only to the extent that
the  applicable  arbitrator or court shall so direct and such direction is final
and not subject to appeal or review.

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                  (j)  Integration.   This  Agreenment  and  the  Sock  Purchase
Agreement  constitute the entire agreement of the parties hereto  respecting the
registration of the  Registrable  Shares by the Holders and correctly sets forth
the  rights,  duties,  and  obligations  of each  party  hereto to the others in
relation thereto as of its date and supercedes any prior  agreements,  promises,
negotiations  or  representations  concerning  its subject  matter which are not
expressly set forth in this Agreement.

                  (k) No Inconsistent Agreements. The Company will not hereafter
enter into any agreement  with respect to its  securities  that is  inconsistent
with or violates the rights granted to the holders of Registrable Shares in this
Agreement.

                             (SIGNATURES FOLLOWING)


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           SIGNATURE PAGE TO 2004 ENOVA REGISTRATION RIGHTS AGREEMENT


         IN WITNESS WHEREOF, the parties hereto have executed this Registration
Rights Agreement effective as of the Effective Date.

Investor                               Enova Systems, Inc.


By:_______________________________     By:______________________________________
                                          Carl D. Perry, Chief Executive Officer

                   ADDENDUM BETWEEN THE COMPANY AND INVESTOR
                   -----------------------------------------

         A. The  Company  shall  use  reasonable  efforts  to (i)  register  and
qualify, unless an exemption from registration or qualification applies, all the
Registrable  Shares of the above  named  Investor  covered  by the  Registration
Statement under all securities or "blue sky" laws of such  jurisdictions  in the
United States that are required by such Investor upon written  notice thereof to
the  Company,  (ii)  prepare and file in those  jurisdictions,  such  amendments
(including post-effective  amendments) and supplements to such registrations and
qualifications as may be necessary to maintain the effectiveness  thereof during
the registration period set forth in Section 6 of the Agreement, (iii) take such
other  actions  as  may  be  necessary  to  maintain  such   registrations   and
qualifications  in effect at all times  during the period set forth in Section 6
of the  Agreement,  and (iv)  take all other  actions  reasonably  necessary  or
advisable to qualify the  Registrable  Shares of such  Investor for sale in such
jurisdictions;  provided,  however,  that the  Company  shall not be required in
connection  therewith or as a condition thereto to (x) qualify to do business in
any  jurisdiction  where it would not  otherwise  be required to qualify but for
this  paragraph A, (y) subject itself to taxation in any such  jurisdiction,  or
(z) file a general consent to service of process in any such jurisdiction.

         B. If the Registration Statement covering all the Registrable Shares of
the above named  Investor  and  required to be filed by the Company  pursuant to
this  Agreement  is not declared  effective  by the SEC within 30 calendar  days
after the date set forth in Section 2(a) of the Agreement for any reason,  then,
as partial  relief for the damages to such  Investor by reason of any such delay
in or  reduction of its ability to sell its  Registrable  Shares  (which  remedy
shall not be  exclusive of any other  remedies  available at law or in equity to
such Investor), the Company shall grant to such Investor, free of charge, Common
Stock in an amount  equal to 1% of the Common Stock  purchased by such  Investor
pursuant to its executed  Stock  Purchase  Agreement  on even date  herewith for
every  complete 30 calendar  day period after the date set forth in Section 2(a)
of the Agreement that the  Registration  Statement is not declared  effective by
the SEC. Any such additional  Common Stock granted to such Investor  pursuant to
this  paragraph B shall be granted by the Company  within 45 days after the date
that the  Registration  Statement is declared  effective  and the Company  shall
promptly include such additional Common Stock in the Registration Statement.

         C. If  Investor's  Registrable  Shares have not been  registered by the
Company  under  this  Agreement  prior  to the  second  anniversary  date of the
Effective Date, so long as the conditions  under Rule 144(k)  promulgated by the
Securities and Exchange  Commission have been met for such  Registrable  Shares,
the Company  hereby agrees to instruct its transfer agent to remove the Rule 144
restrictive  legend placed thereon upon written  request from the Investor given
at any time after such two year period.


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