Exhibit 5

Lockup Agreement

SOLAR SENIOR CAPITAL LTD.

Public Offering of Common Stock

February 7, 2011

Citigroup Global Markets Inc.

390 Greenwich Street

New York, NY 10013

As Representative of the several Underwriters,

c/o Citigroup Global Markets Inc.

388 Greenwich Street

New York, New York 10013

Ladies and Gentlemen:

This Lock-Up Letter Agreement is being delivered to you in connection with the proposed Underwriting Agreement (the “Underwriting Agreement”) to be entered into by and among Solar Senior Capital Ltd., a Maryland corporation (the “Company”), Solar Capital Partners, LLC, a Delaware limited liability company and Solar Capital Management, LLC, a Delaware limited liability company, and you, as Representatives of the several Underwriters named therein, with respect to the public offering (the “Offering”) of Common Stock, par value $0.01 per share, of the Company (the “Common Stock”).

In order to induce you to enter into the Underwriting Agreement, the undersigned agrees that for a period of 180 days after the date of the final prospectus relating to the Offering the undersigned will not, without the prior written consent of the Representatives, (i) sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly, or file (or participate in the filing of) a registration statement with the Securities and Exchange Commission (the “Commission”) in respect of, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder with respect to, any Common Stock of the Company or any securities convertible into or exercisable or exchangeable for Common Stock, or warrants or other rights to purchase Common Stock, (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock, or warrants or other rights to purchase Common Stock, whether any such transaction is to be settled by delivery of Common Stock or such other securities, in cash or otherwise, or (iii) publicly announce an

intention to effect any transaction specified in clause (i) or (ii). The foregoing sentence shall not apply to (a) the registration of or sale to the Underwriters of any Common Stock pursuant to the Offering and the Underwriting Agreement, (b) bona fide gifts, provided the recipient thereof agrees in writing with the Underwriters to be bound by the terms of this Lock-Up Letter Agreement or (c) dispositions to any trust for the direct or indirect benefit of the undersigned and/or the immediate family of the undersigned, provided that such trust agrees in writing with the Underwriters to be bound by the terms of this Lock-Up Letter Agreement.

In addition, the undersigned hereby waives any rights the undersigned may have to require registration of Common Stock in connection with the filing of a registration statement relating to the Offering. The undersigned further agrees that, for a period of 180 days after the date of the final prospectus relating to the Offering, the undersigned will not, without the prior written consent of the Representatives, make any demand for, or exercise any right with respect to, the registration of Common Stock of the Company or any securities convertible into or exercisable or exchangeable for Common Stock, or warrants or other rights to purchase Common Stock; provided, however, that the filing of a registration statement by the Company under the Securities Act of 1933, as amended, with the Commission, for the registration of an aggregate amount of shares issued pursuant to the private placement transaction concurrent with the Offering, pursuant to which Common Stock was issued and sold to Solar Senior Capital Investors LLC, including any required amendments or supplements thereto, shall not be prohibited by the foregoing.

If (i) the Company issues an earnings release or material news or a material event relating to the Company occurs during the last 17 days of the 180 day lock-up period, or (ii) prior to the expiration of the 180 day lock-up period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the 180 day lock-up period, the restrictions imposed by this Agreement shall continue to apply until the expiration of the 18-day period beginning on the issuance of the earnings release or the occurrence of the material news or material event.

If (i) the Company notifies you in writing that it does not intend to proceed with the Offering, (ii) the registration statement filed with the Securities and Exchange Commission with respect to the Offering is withdrawn or (iii) for any reason the Underwriting Agreement shall be terminated prior to the time of purchase (as defined in the Underwriting Agreement), this Lock-Up Letter Agreement shall be terminated and the undersigned shall be released from its obligations hereunder.

Yours very truly,
	/s/ Michael S. Gross
Name:	Michael S. Gross
	Managing Member
	Solar Senior Capital Investors LLC