JOINDER AND FOURTH LOAN MODIFICATION AGREEMENT

Exhibit 10.1

JOINDER AND FOURTH LOAN MODIFICATION AGREEMENT

This Joinder and Fourth Loan Modification Agreement (this “Loan Modification Agreement”) is entered into as of September 26, 2013 (the “Fourth Loan Modification Effective Date”), by and among (i) SILICON VALLEY BANK, a California corporation with a loan production office located at 555 Mission St., Suite 900, San Francisco, California 94105 (“Bank”), (ii) REAL GOODS ENERGY TECH, INC., a Colorado corporation (“Real Goods Energy”), REAL GOODS TRADING CORPORATION, a California corporation (“Real Goods Trading”), and ALTERIS RENEWABLES, INC., a Delaware corporation (“Alteris” and together with Real Goods Energy, and Real Goods Trading, individually and collectively, jointly and severally, the “Borrower”), and (iii) REAL GOODS SYNDICATED, INC., a Delaware corporation (“New Borrower” or “Syndicated”).

1. DESCRIPTION OF EXISTING INDEBTEDNESS AND OBLIGATIONS. Among other indebtedness and obligations which may be owing by Borrower to Bank, Borrower is indebted to Bank pursuant to a loan arrangement dated as of December 19, 2011, evidenced by, among other documents, a certain Loan and Security Agreement, dated as of December 19, 2011, as amended by a certain First Loan Modification Agreement, dated as of August 28, 2012, as further amended by a certain Second Loan Modification and Reinstatement Agreement, dated as of November 13, 2012 and as further amended by a certain Third Loan Modification Agreement, dated as of March 27, 2013 (as amended, the “Loan Agreement”). Capitalized terms used but not otherwise defined herein shall have the same meaning as in the Loan Agreement.

2. DESCRIPTION OF COLLATERAL Repayment of the Obligations is secured by (i) the Collateral as described in the Loan Agreement, (ii) that certain Security Agreement, dated as of December 19, 2011, between the Secured Guarantor and Bank (as amended, the “Security Agreement”), and (ii) the “Intellectual Property Collateral”, as such term is defined in that certain IP Agreement, dated as of the Fourth Loan Modification Effective Date, by and among Bank, Borrower and New Borrower (together with any other collateral security granted to Bank, the “Security Documents”).

Hereinafter, the Loan Agreement, together with all other documents executed in connection therewith evidencing, securing or otherwise relating to the Obligations shall be referred to as the “Existing Loan Documents”.

3. JOINDER AND ASSUMPTION. New Borrower has been purchased by Secured Guarantor and is a wholly owned Subsidiary of Secured Guarantor. New Borrower hereby joins the Loan Agreement and each of the other appropriate Existing Loan Documents, and agrees to comply with and be bound by all of the terms, conditions and covenants of the Loan Agreement and each of the other appropriate Existing Loan Documents, as if New Borrower were originally named a “Borrower” and/or a “Debtor” therein. Without limiting the generality of the preceding sentence, New Borrower hereby assumes and agrees to pay and perform when due all present and future indebtedness, liabilities and obligations of Borrower under the Loan Agreement, including, without limitation, the Obligations. From and after the date hereof, all references in the Existing Loan Documents to “Borrower” and/or “Debtor” shall be deemed to refer to and include New Borrower. Further, all present and future Obligations of Borrower shall be deemed to refer to all present and future Obligations of New Borrower. New Borrower acknowledges that the Obligations are due and owing to Bank from Borrower including, without limitation, New Borrower, without any defense, offset or counterclaim of any kind or nature whatsoever as of the date hereof.

4. GRANT OF SECURITY INTEREST. To secure the payment and performance of all of the Obligations, New Borrower hereby grants to Bank a continuing lien upon and security interest in all of New Borrower’s now existing or hereafter arising rights and interest in the Collateral, whether now owned or existing or hereafter created, acquired, or arising, and wherever located, including, without limitation, all of New Borrower’s assets listed on Exhibit A to the Loan Agreement and all of New Borrower’s books and records relating to the foregoing and any and all claims, rights and interests in any of the above and all substitutions for, additions, attachments, accessories, accessions and improvements to and replacements, products, proceeds and insurance proceeds of any or all of the foregoing. New Borrower represents, warrants, and covenants that the security interest granted herein is and shall at all times continue to be a first priority perfected security interest in the Collateral (subject only to Permitted Liens that may have superior priority to Bank’s Lien under the Loan Agreement). If New Borrower shall acquire a commercial tort claim, such New Borrower shall promptly notify Bank in a writing signed by such New Borrower of the general details thereof and grant to Bank in such writing a security interest therein and in the proceeds thereof, all upon the terms of this Agreement, with such writing to be in form and substance reasonably satisfactory to Bank. New Borrower further covenants and agrees that by its execution hereof it shall provide all such information, complete all such forms, and take all such actions, and enter into all such agreements, in form and substance

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reasonably satisfactory to Bank that are reasonably deemed necessary by Bank in order to grant and continue a valid, first perfected security interest to Bank in the Collateral. New Borrower hereby authorizes Bank to file financing statements, without notice to any Borrower, with all appropriate jurisdictions in order to perfect or protect Bank’s interest or rights hereunder, including a notice that any disposition of the Collateral, by either any Borrower or any other Person, may be deemed to violate the rights of Bank under the Code. Such financing statements may indicate the Collateral as “all assets of the Debtor” or words of similar effect, or as being of an equal or lesser scope, or with greater detail, all in Bank’s discretion.

5. SUBROGATION AND SIMILAR RIGHTS. Borrower (in each case including, without limitation, New Borrower) waives any suretyship defenses available to it under the Code or any other applicable law. Borrower waives any right to require Bank to: (i) proceed against any other Borrower or any other Person; (ii) proceed against or exhaust any security; or (iii) pursue any other remedy. Bank may exercise or not exercise any right or remedy it has against any Borrower or any security it holds (including the right to foreclose by judicial or non-judicial sale) without affecting any Borrower’s liability. Notwithstanding any other provision of this Loan Modification Agreement, the Loan Agreement, or any other Loan Documents, Borrower irrevocably waives all rights that it may have at law or in equity (including, without limitation, any law subrogating such Borrower to the rights of Bank under the Loan Agreement), to seek contribution, indemnification or any other form of reimbursement from any other Borrower or any other Person now or hereafter primarily or secondarily liable for any of the Obligations, for any payment made by any Borrower with respect to the Obligations in connection with the Loan Agreement or otherwise and all rights that it might have to benefit from, or to participate in, any security for the Obligations as a result of any payment made by any Borrower with respect to the Obligations in connection with the Loan Agreement or otherwise. Any agreement providing for indemnification, reimbursement or any other arrangement prohibited under this section shall be null and void. If any payment is made to any Borrower in contravention of this section, such Borrower shall hold such payment in trust for Bank and such payment shall be promptly delivered to Bank for application to the Obligations, whether matured or unmatured. Any Borrower may, acting singly, request Credit Extensions under the Loan Agreement. Each Borrower hereby appoints the other as agent for the other for all purposes under the Loan Agreement, including with respect to requesting Credit Extensions thereunder. Each Borrower shall be jointly and severally obligated to repay all Credit Extensions made under the Loan Agreement or any other Loan Documents, regardless of which Borrower actually received said Credit Extension, as if each Borrower directly received all Credit Extensions.

6. REPRESENTATIONS AND WARRANTIES. Except as described in the revised Perfection Certificate delivered in connection herewith, Borrower hereby represents and warrants to Bank that all representations and warranties in the Loan Documents made on the part of any Borrower are true and correct on the date hereof with respect to New Borrower, with the same force and effect as if New Borrower were originally named as “Borrower” in the Loan Documents. In addition, Borrower and New Borrower hereby represent and warrant to Bank that this Loan Modification Agreement has been duly executed and delivered by Borrower and New Borrower, and constitutes their legal, valid and binding obligation, enforceable against each in accordance with its terms. Hereafter, each reference to “Borrower” and/or “Debtor”) in any Loan Document shall be deemed to reference both Borrower and New Borrower.

7. DESCRIPTION OF CHANGE IN TERMS.

“(i) Advances. Subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the Prime Rate plus four and three-quarters percentage points (4.75%); provided that during a Streamline Period, the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the Prime Rate plus two percentage points (2.00%), which interest shall be payable monthly, in arrears, in accordance with Section 2.3(g) below.”

and inserting in lieu thereof the following:

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“(i) Advances. From the fourth Loan Modification Date through and including the earlier to occur of (x) the closing of the Mercury Acquisition and (y) January 31, 2014, subject to subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the greater of (i) the Prime Rate plus four percentage points (4.00%) and (ii) eight percent (8.00%); provided that during a Streamline Period, the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the greater of (i) the Prime Rate plus two percentage points (2.00%) and (y) six percent (6.00%), which interest shall in any event be payable monthly, in arrears, in accordance with Section 2.3(g) below

From and after the earlier to occur of (x) the closing of the Mercury Acquisition and (y) January 31, 2014, subject to Section 2.3(b), the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the greater of (i) the Prime Rate plus four percentage points (4.00%) and (ii) eight percent (8.00%); provided that during a Streamline Period, the principal amount outstanding under the Revolving Line shall accrue interest at a floating per annum rate equal to the greater of (i) the Prime Rate plus two percentage points (2.00%) and (ii) six percent (6.00%), which interest shall in any event be payable monthly, in arrears, in accordance with Section 2.3(g) below.”

“(c) Collection of Accounts. Borrower shall have the right to collect all Accounts, unless and until a Default or an Event of Default has occurred and is continuing. Not later than ninety (90) days after the Third Loan Modification Effective Date, Borrower shall cause all payments on, and proceeds of, Accounts (including, without limitation, Accounts of the Real Goods Borrowers) to be deposited directly by the applicable Account Debtor into a lockbox account, or such other “blocked account” as Bank may specify, pursuant to a blocked account agreement in form and substance satisfactory to Bank in its sole discretion. Whether or not an Event of Default has occurred and is continuing, Borrower shall immediately deliver all payments on and proceeds of Accounts (including, without limitation, Accounts of the Real Goods Borrowers) to an account maintained with Bank to be applied (i) prior to an Event of Default, to the Revolving Line pursuant to the terms of Section 2.5(b) hereof, and (ii) after the occurrence and during the continuance of an Event of Default, pursuant to the terms of Section 9.4 hereof; provided, that during a Streamline Period, such payments and proceeds shall be transferred to an operating account of Borrower maintained at Bank. Notwithstanding anything herein to the contrary, including, without limitation, the provisions of Section 6.8, the parties acknowledge that, until the date that is ninety (90) days after the Third Loan Modification Effective Date, Borrower shall be permitted to maintain the Wells Fargo Account for the deposit of payments on, and proceeds of, Accounts of the Real Goods Borrowers.”

and inserting in lieu thereof the following:

“(c) Collection of Accounts. Borrower shall have the right to collect all Accounts, unless and until a Default or an Event of Default has occurred and is continuing. Borrower shall cause all payments on, and proceeds of, Accounts (including, without limitation, Accounts of the Real Goods Borrowers) to be deposited directly by the applicable Account Debtor into a lockbox account, or such other “blocked account” as Bank may specify, pursuant to a blocked account agreement in form and substance satisfactory to Bank in its sole discretion. Whether or not an Event of Default has occurred and is continuing, Borrower shall immediately deliver all payments on and proceeds of Accounts (including, without limitation, Accounts of the Real Goods Borrowers) to an account maintained with Bank to be applied (i) prior to an Event of Default, to the Revolving Line pursuant to the terms of Section 2.5(b) hereof, and (ii) after the occurrence and during the continuance of an Event of Default, pursuant to the

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terms of Section 9.4 hereof; provided, that during a Streamline Period, such payments and proceeds shall be transferred to an operating account of Borrower maintained at Bank.”

“6.8 Operating Accounts.

(a) Maintain its and its Subsidiaries’ (other than Finco or any Subsidiary of Finco, for which this Section 6.8(a) shall be inapplicable), primary depository accounts, operating accounts and securities accounts with Bank and Bank’s affiliates with all excess funds maintained at or invested through Bank or an affiliate of Bank; provided that, Borrower shall be permitted to maintain cash in its existing Wells Fargo Account in a maximum amount not to exceed the amount necessary to cover outstanding checks drawn on such Wells Fargo Account, with all amounts in excess thereof transferred to an account of Borrower maintained at Bank.

(b) Provide Bank five (5) days prior-written notice before establishing any Collateral Account at or with any bank or financial institution other than Bank or Bank’s Affiliates. For each Collateral Account that Borrower at any time maintains (including, without limitation, the Wells Fargo Account, but excluding until required by Bank, in its sole discretion, existing Collateral Accounts of Real Goods Trading maintained at financial institutions other than Bank), Borrower shall cause the applicable bank or financial institution (other than Bank) at or with which any Collateral Account is maintained to execute and deliver a Control Agreement or other appropriate instrument with respect to such Collateral Account to perfect Bank’s Lien in such Collateral Account in accordance with the terms hereunder which Control Agreement may not be terminated without the prior written consent of Bank. The provisions of the previous sentence shall not apply to deposit accounts exclusively used for payroll, payroll taxes and other employee wage and benefit payments to or for the benefit of Borrower’s employees and identified to Bank by Borrower as such.”

and inserting in lieu thereof the following:

“6.8 Operating Accounts.

(a) Maintain its and its Subsidiaries’ (other than Finco or any Subsidiary of Finco, for which this Section 6.8(a) shall be inapplicable), primary depository accounts, operating accounts and securities accounts with Bank and Bank’s affiliates with all excess funds maintained at or invested through Bank or an affiliate of Bank.

(b) Provide Bank five (5) days prior-written notice before establishing any Collateral Account at or with any bank or financial institution other than Bank or Bank’s Affiliates. For each Collateral Account that Borrower at any time maintains, Borrower shall cause the applicable bank or financial institution (other than Bank) at or with which any Collateral Account is maintained to execute and deliver a Control Agreement or other appropriate instrument with respect to such Collateral Account to perfect Bank’s Lien in such Collateral Account in accordance with the terms hereunder which Control Agreement may not be terminated without the prior-written consent of Bank. The provisions of the previous sentence shall not apply to deposit accounts exclusively used for payroll, payroll taxes and other employee wage and benefit payments to or for the benefit of Borrower’s employees and identified to Bank by Borrower as such.”

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“6.9 Financial Covenant. Maintain at all times, to be tested as of the last day of each month, on a consolidated basis with respect to Borrower and its Subsidiaries (A) the sum of (i) Qualified Cash (which Qualified Cash shall in any event at all times consist of not less than Five Hundred Thousand Dollars ($500,000) of Borrower’s unrestricted cash maintained at Bank) plus (ii) Borrower’s Eligible Accounts divided by (B) the total outstanding Obligations of Borrower owed to Bank, expressed as a ratio, of at least 1.50:1.00.”

and inserting in lieu thereof the following:

“6.9 Financial Covenants.

Maintain at all times, subject to periodic reporting as described below, on a consolidated basis with respect to Borrower, unless otherwise indicated:

(a) Liquidity Ratio. (I) from the Fourth Loan Modification Effective Date through and including the earlier of (x) the occurrence of the Mercury Acquisition and (y) January 31, 2014, maintain (A) the sum of (i) Qualified Cash plus (ii) Borrower’s Eligible Accounts divided by (B) the sum of (i) the total outstanding Obligations of Borrower owed to Bank plus (ii) the total outstanding Subordinated Debt of Borrower, expressed as a ratio, of at least 1.50:1.00; and (II) thereafter, maintain (A) the sum of (i) Qualified Cash plus (ii) Borrower’s Eligible Accounts divided by (B) the sum of (i) the total outstanding Obligations of Borrower owed to Bank plus (ii) the total outstanding Subordinated Debt of Borrower, expressed as a ratio, of at least 1.75:1.00.

(b) EBITDA. Achieve EBITDA (loss no worse than), measured quarterly, on a trailing six month basis (unless otherwise indicated below), of the following amounts for as of each period ending as of the date indicated below:

; provided, that nothing in the foregoing financial covenants shall be deemed to be an extension of the Revolving Line Maturity Date.

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“7.9 Subordinated Debt. (a) Make or permit any payment on any Subordinated Debt, except under the terms of the subordination, intercreditor, or other similar agreement to which such Subordinated Debt is subject, or (b) amend any provision in any document relating to the Subordinated Debt which would increase the amount thereof or adversely affect the subordination thereof to Obligations owed to Bank.”

and inserting in lieu thereof the following:

“7.9 Subordinated Debt. (a) Make or permit any payment on any Subordinated Debt, except under the terms of the subordination, intercreditor, or other similar agreement to which such Subordinated Debt is subject, or (b) amend any provision in any document relating to the Subordinated Debt which would increase the amount thereof or adversely affect the subordination thereof to Obligations owed to Bank; provided, that with respect to Subordinated Debt owed to (i) Riverside Renewable Energy Investments, LLC, and (ii) following receipt by Bank of an executed Amended and Restated Subordination Agreement from Gaiam, Inc., (collectively, the “Existing Subordinated Creditors”), in form and substance acceptable to Bank, in its reasonable discretion, Borrower shall be permitted to pay, and each Existing Subordinated Creditor shall be permitted to retain, each regularly scheduled non-default payment of interest and principal as and when due, so long as (i) no Event of Default exists immediately prior to any such payment and after giving effect to any such payment; and (ii) Borrower maintains Net Cash at Bank at all times of at least Eight Million Dollars ($8,000,000).”

“EBITDA” shall mean, with respect to Borrower, on a consolidated basis, for any period of measurement, in each case determined in accordance with GAAP: (a) Net Income; plus (b) the following, in each case to the extent deducted from the calculation of Net Income: (i) Interest Expense; (ii) income tax expense; (iii) depreciation expense and amortization expense; (iv) non-cash stock compensation expense; (v) for the trailing three month period ending September 30, 2013, up to Two Hundred Fifty Thousand Dollars ($250,000) of one-time, non-recurring cash transaction expenses actually incurred in connection with the Syndicated Acquisition and/or the Mercury Acquisition; and (vi) for the trailing six month period ending December 31, 2013, up to One Million Two Hundred Fifty Thousand Dollars ($1,250,000) of one-time, non-recurring cash transaction expenses actually incurred in connection with the Syndicated Acquisition and/or the Mercury Acquisition; minus (c) the following, to the extent included in the calculation of Net Income: (i) interest income; (ii) income tax credits (to the extent not netted from income tax expense); and (iii) all extraordinary gains and all other non-cash items of income for such period.

“Existing Subordinated Creditor” is defined in Section 7.9.

“Fourth Loan Modification Agreement” is that certain Joinder and Fourth Loan Modification Agreement, by and between Borrower and Bank, dated as of the Fourth Loan Modification Effective Date.

“Fourth Loan Modification Effective Date” is September 26, 2013.

“Interest Expense” means for any fiscal period, interest expense (whether cash or non-cash) determined in accordance with GAAP for the relevant period ending on such date, including, in any event, interest expense with respect to any Credit Extension and other Indebtedness of Borrower, including, without limitation or duplication, all commissions, discounts, or related amortization and other fees and charges with respect to letters of credit and bankers’ acceptance financing and the net costs associated with interest rate swap, cap, and similar arrangements, and the interest portion of any deferred payment obligation (including leases of all types).

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“IP Agreement” is that certain Intellectual Property Security Agreement executed and delivered by Borrower to Bank dated as of the Fourth Loan Modification Effective Date.

“Liquidity Ratio” is defined in Section 6.9(a).

“Net Income” means, as calculated on a consolidated basis for Borrower and its Subsidiaries for any period as at any date of determination, the net profit (or loss), after provision for taxes, of Borrower and its Subsidiaries for such period taken as a single accounting period.

“Mercury Acquisition” is the acquisition by Borrower of Mercury Energy, Inc. through a reverse triangular merger with Real Goods Mercury, Inc., a Delaware corporation and wholly owned subsidiary of Borrower.

“Net Cash” is the result of (i) Borrower’s unrestricted cash at Bank minus (ii) all outstanding Obligations of Borrower owed to Bank.

“Syndicated” is defined in the preamble to the Fourth Loan Modification Agreement.

“Syndicated Acquisition” is the acquisition by Syndicated of all or substantially all of the assets of Syndicated Solar, Inc., a Delaware corporation, and Syndicated Solar, Inc., a California corporation (“Seller”), as described in a certain Asset Purchase Agreement dated as of August 9, 2013, by an among Real goods, Syndicated and Seller.

““Guaranty” is any present or future agreement pursuant to which any Guarantor agrees to guaranty the Obligations of Borrower to Bank, including without limitation, that certain Unconditional Guaranty dated the date hereof by Secured Guarantor in favor of Bank.

“Loan Documents” are, collectively, this Agreement, the Guaranty, the Security Agreement, the Perfection Certificate, the Subordination Agreement, any Bank Services Agreement, any subordination agreement, any note, or notes or guaranties executed by Borrower or any Guarantor, and any other present or future agreement between Borrower and any Guarantor and/or for the benefit of Bank, all as amended, restated, or otherwise modified.

“Revolving Line Maturity Date” is September 30, 2013.

“Security Agreement” is that certain Security Agreement date the date hereof by and between Secured Guarantor and Bank.

“Streamline Period” is, on and after the Effective Date, provided no Default or Event of Default has occurred and is continuing, the period (i) beginning on the first (1st) day in which Borrower has, for each consecutive day in the immediately preceding sixty (60) day period, maintained Qualified Cash minus the total outstanding Obligations of Borrower owed to Bank, as determined by Bank, in its sole discretion, in an amount at all times greater than or equal to Two Million Dollars ($2,000,000), as determined by Bank, in its sole discretion (the “Streamline Balance”); and (ii) ending on the earlier to occur of (A) the occurrence of a Default or an Event of Default; and (B) the first day thereafter in which Borrower fails to maintain the Streamline Balance, as determined by Bank, in its sole discretion. Upon the termination of a Streamline Period, Borrower must maintain the Streamline Balance each consecutive day for sixty (60) consecutive days, as determined by Bank, in its sole discretion, prior to entering into a subsequent Streamline Period.

“Subordination Agreement” the collective reference to (i) that certain Subordination Agreement by Gaiam, Inc., (ii) that certain Subordination Agreement by Riverside Renewable Energy Investments, LLC, each in favor of Bank, and each dated on or about the date hereof; and (iii) each other subordination, intercreditor or similar agreement entered into by Bank and any creditor of Borrower.”

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and inserting in lieu thereof the following:

““Guaranty” is any present or future agreement pursuant to which any Guarantor agrees to guaranty the Obligations of Borrower to Bank, including without limitation, that certain Amended and Restated Unconditional Guaranty dated as of the Fourth Loan Modification Effective Date, by Secured Guarantor in favor of Bank.

“Loan Documents” are, collectively, this Agreement, the Guaranty, the Security Agreement, the Perfection Certificate, the Subordination Agreement, the IP Agreement, any Bank Services Agreement, any subordination agreement, any note, or notes or guaranties executed by Borrower or any Guarantor, and any other present or future agreement between Borrower and any Guarantor and/or for the benefit of Bank, all as amended, restated, or otherwise modified.

“Revolving Line Maturity Date” is September 29, 2014.

“Security Agreement” is that certain Amended and Restated Security Agreement dated as of the Fourth Loan Modification Effective Date, by and between Secured Guarantor and Bank.

“Streamline Period” is, on and after the Fourth Loan Modification Effective Date, provided no Default or Event of Default has occurred and is continuing, the period (X) beginning on the first (1st) day in which Borrower has, for each consecutive day in two (2) consecutive monthly periods, maintained a Liquidity Ratio, as determined by Bank, in its sole discretion, in an amount at all times greater than or equal to (i) from the Fourth Loan Modification Effective Date through and including the earlier of (I) the occurrence of the Mercury Acquisition and (II) January 31, 2014, 1.75:1.00; and (ii) thereafter, 2.00:1.00 (the “Streamline Threshold”); and (ii) ending on the earlier to occur of (A) the occurrence of a Default or an Event of Default; and (B) the first day thereafter in which Borrower fails to maintain the Streamline Threshold, as determined by Bank, in its sole discretion. Upon the termination of a Streamline Period, Borrower must maintain the Streamline Threshold each consecutive day for two (2) consecutive monthly periods, as determined by Bank, in its sole discretion, prior to entering into a subsequent Streamline Period.

“Subordination Agreement” the collective reference to (i) that certain Subordination Agreement by Gaiam Energy Tech, Inc., (ii) that certain Amended and Restated Subordination Agreement by Riverside Renewable Energy Investments, LLC, each in favor of Bank, and each dated on or about the Fourth Loan Modification Effective Date; and (iii) each other subordination, intercreditor or similar agreement entered into by Bank and any creditor of Borrower.”

8. CONDITIONS PRECEDENT. Borrower hereby agrees that the following documents shall be delivered to the Bank prior to or concurrently with the execution of this Loan Modification Agreement, each in form and substance satisfactory to the Bank (collectively, the “Conditions Precedent”):

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9. FEES. Borrower shall pay to Bank an extension fee equal to Sixty Five Thousand Dollars ($65,000.00), which fee shall be due on the date hereof and shall be deemed fully earned as of the date hereof. Borrower shall also reimburse Bank for all legal fees and expenses incurred in connection with the Existing Loan Documents and this Loan Modification Agreement.

10. CONDITION SUBSEQUENT. On or before the date that is ten (10) Business Days after the occurrence of the Mercury Acquisition, Borrower shall cause Real Goods Mercury, Inc., a Delaware corporation (“Mercury”), to comply with Section 6.12 of the Loan Agreement. Until such time as Borrower has caused Mercury to comply with Section 6.12 of the Loan Agreement to Bank’s satisfaction, in its reasonable discretion (including, without limitation, the granting by Mercury to Bank of a first-priority, perfected security interest to Bank in all assets of Mercury, and the joinder to such Loan Documents by Bank as Bank shall require, in its reasonable discretion), no accounts of Mercury will be included in any Borrowing Base calculation.

11. FINAL PAYMENT FEE. In addition to the fees and expenses described above, on or before September 30, 2013, Borrower shall pay to Bank a final payment fee equal to Forty Thousand Dollars ($40,000) (the “Final Payment Fee”), which final payment fee shall be fully earned and non-refundable when paid. Such Final Payment Fee is in lieu of and replaces any other “final payment fee” described in any prior loan modification agreement or in any other Loan Document.

12. ADDITIONAL COVENANTS: RATIFICATION OF PERFECTION CERTIFICATE. Borrower hereby certifies that, other than as disclosed in the Perfection Certificate, no Collateral with a value greater than Ten Thousand Dollars ($10,000) in the aggregate is in the possession of any third party bailee (such as at a warehouse). In the event that Borrower, after the date hereof, intends to store or otherwise deliver the Collateral with a value in excess of Ten Thousand Dollars ($10,000) in the aggregate to such a bailee, then Borrower shall first receive, the prior written consent of Bank and such bailee must acknowledge in writing that the bailee is holding such Collateral for the benefit of Bank. Except as supplemented through the Fourth Loan Modification Effective Date and with respect to the Perfection Certificate of New Borrower, dated as of the Fourth Loan Modification Effective Date,

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Borrower hereby ratifies, confirms and reaffirms, all and singular, the terms and disclosures contained in a certain Perfection Certificate, dated as of December 19, 2011, as supplemented through the Fourth Loan Modification Effective Date, and acknowledges, confirms and agrees the disclosures and information above Borrower provided to Bank in such Perfection Certificate remains true and correct in all material respects as of the date hereof.

13. CONSISTENT CHANGES. The Existing Loan Documents are hereby amended wherever necessary to reflect the changes described above.

14. RATIFICATION OF LOAN DOCUMENTS. Borrower hereby ratifies, confirms, and reaffirms all terms and conditions of the Loan Agreement and each other Loan Document, and of all security or other collateral granted to the Bank, and confirms that the indebtedness secured thereby includes, without limitation, the Obligations.

15. NO DEFENSES OF BORROWER. Borrower hereby acknowledges and agrees that Borrower has no offsets, defenses, claims, or counterclaims against Bank with respect to the Obligations, or otherwise, and that if Borrower now has, or ever did have, any offsets, defenses, claims, or counterclaims against Bank, whether known or unknown, at law or in equity, all of them are hereby expressly WAIVED and Borrower hereby RELEASES Bank from any liability thereunder.

16. CONTINUING VALIDITY. Borrower understands and agrees that in modifying the existing Obligations, Bank is relying upon Borrower’s representations, warranties, and agreements, as set forth in the Existing Loan Documents. Except as expressly modified pursuant to this Loan Modification Agreement, the terms of the Existing Loan Documents remain unchanged and in full force and effect. Bank’s agreement to modify the Existing Loan Documents pursuant to this Loan Modification Agreement in no way shall obligate Bank to make any future modifications to the Obligations. Nothing in this Loan Modification Agreement shall constitute a satisfaction of the Obligations. It is the intention of Bank and Borrower to retain as liable parties all makers of Existing Loan Documents, unless the party is expressly released by Bank in writing. No maker will be released by virtue of this Loan Modification Agreement.

18. COUNTERSIGNATURE. This Loan Modification Agreement shall become effective only when it shall have been executed by Borrower and Bank.

[Signature page follows.]

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This Loan Modification Agreement is executed as of the date first written above.

BANK:

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Exhibit A to Fourth Loan Modification Agreement

EXHIBIT B

COMPLIANCE CERTIFICATE

The undersigned authorized officer of REAL GOODS ENERGY TECH, INC., et al. (the “Borrower”) certifies that under the terms and conditions of the Loan and Security Agreement between Borrower and Bank (as amended, the “Agreement”), (1) Borrower is in complete compliance for the period ending                      with all required covenants except as noted below, (2) there are no Events of Default, (3) all representations and warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such date, (4) Borrower, and each of its Subsidiaries, has timely filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and local taxes, assessments, deposits and contributions owed by Borrower except as otherwise permitted pursuant to the terms of Section 5.9 of the Agreement, and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries, if any, relating to unpaid employee payroll or benefits of which Borrower has not previously provided written notification to Bank. Attached are the required documents supporting the certification. The undersigned certifies that these are prepared in accordance with GAAP consistently applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may be requested at any time or date of determination that Borrower is not in compliance with any of the terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not otherwise defined herein shall have the meanings given them in the Agreement.

Please indicate compliance status by circling Yes/No under “Complies” column.

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The following financial covenant analyses and information set forth in Schedule 1 attached hereto are true and accurate as of the date of this Certificate.

The following are the exceptions with respect to the certification above: (If no exceptions exist, state “No exceptions to note.”)

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Schedule 1 to Compliance Certificate

Financial Covenants of Borrower

In the event of a conflict between this Schedule and the Loan Agreement, the terms of the Loan Agreement shall govern.

Dated:                                              

Required:(I) from the Fourth Loan Modification Effective Date through and including the earlier of (x) the occurrence of the Mercury Acquisition and (y) January 31, 2014, maintain (A) the sum of (i) Qualified Cash plus (ii) Borrower’s Eligible Accounts divided by (B) the sum of (i) the total outstanding Obligations of Borrower owed to Bank plus (ii) the total outstanding Subordinated Debt of Borrower, expressed as a ratio, of at least 1.50:1.00; and (II) thereafter, maintain (A) the sum of (i) Qualified Cash plus (ii) Borrower’s Eligible Accounts divided by (B) the sum of (i) the total outstanding Obligations of Borrower owed to Bank plus (ii) the total outstanding Subordinated Debt of Borrower, expressed as a ratio, of at least 1.75:1.00.

Actual:

Is line E equal to or greater than [                    ]:1:00?

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Required: Achieve EBITDA (loss no worse than), measured quarterly, on a trailing six month basis (unless otherwise indicated below), of the following amounts for as of each period ending as of the date indicated below:

; provided, that nothing in the foregoing financial covenants shall be deemed to be an extension of the Revolving Line Maturity Date.

Actual: All amounts measured as indicated above and determined on a consolidated basis in accordance with GAAP:

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Is line D equal to or greater than (loss no worse than $[                    ]?

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Required: On and after the Fourth Loan Modification Effective Date, provided no Default or Event of Default has occurred and is continuing, the period (X) beginning on the first (1st) day in which Borrower has, for each consecutive day in the immediately preceding sixty (60) day period, maintained a Liquidity Ratio, as determined by Bank, in its sole discretion, in an amount at all times greater than or equal to (i) from the Fourth Loan Modification Effective Date through and including the earlier of (I) the occurrence of the Mercury Acquisition and (II) January 31, 2014, 1.75:1.00; and (ii) thereafter, 2.00:1.00 (the “Streamline Threshold”); and (ii) ending on the earlier to occur of (A) the occurrence of a Default or an Event of Default; and (B) the first day thereafter in which Borrower fails to maintain the Streamline Threshold, as determined by Bank, in its sole discretion. Upon the termination of a Streamline Period, Borrower must maintain the Streamline Threshold each consecutive day for sixty (60) consecutive days, as determined by Bank, in its sole discretion, prior to entering into a subsequent Streamline Period.

Actual:

Is line E equal to or greater than                     :1.00?

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