UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Form 8-K)

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

On September 11, 2024 (the "Closing Date"), Solaris Energy Infrastructure, Inc. ("Solaris, Inc."), and Solaris Energy Infrastructure, LLC ("Solaris, LLC" and collectively with Solaris, Inc., "Solaris"), completed its acquisition of Mobile Energy Rental LLC ("MER") in accordance with the Contribution Agreement dated July 9, 2024 (the "Contribution Agreement"). Per the terms of the Contribution Agreement, the members of MER contributed all equity interests in MER to Solaris in exchange for (i) $60 million in cash, subject to adjustments related to reimbursement of capital expenditures and closing net working capital which increased the cash consideration by $76.7 million and (ii) 16,464,778 units of Solaris LLC and an equal number of shares of Class B Common Stock of Solaris Inc in equity consideration, (the "Transaction").

The Transaction is reflected in Solaris, Inc.'s historical consolidated balance sheet as of December 31, 2024 which was filed with the U.S. Securities and Exchange Commission (the "SEC") on Form 10-K on March 5, 2025. The following unaudited pro forma combined financial information gives effect to the Transaction, which was accounted for using the acquisition method of accounting with Solaris identified as the acquiror. Under the acquisition method of accounting, Solaris recorded assets acquired and liabilities assumed from MER at their respective acquisition date fair values on the Closing Date. The unaudited pro forma combined statement of operations give pro forma effect to the consummation of the Transaction on the terms provided for in the Contribution Agreement. For purposes of the pro forma financial statements presented below, it is assumed that Solaris incurred $162 million of additional debt to refinance existing debt and fund the cash due at closing of the Transaction.

The unaudited pro forma combined financial statements are based on and have been derived from the following historical financial statements of Solaris and MER:

The unaudited pro forma combined financial statements have been prepared pursuant to Article 11 of Regulation S-X, and should be read in conjunction with the separate historical financial statements and related notes of Solaris, Inc. and MER.

The unaudited pro forma combined statements of operations for the year ended December 31, 2024 gives effect to the Transaction as if it had occurred on January 1, 2024.

In the opinion of Solaris management, the unaudited pro forma combined financial statements reflect adjustments that are necessary to present fairly the unaudited pro forma combined financial information as of and for the periods indicated, and the pro forma adjustments are based on currently available information and assumptions Solaris believes are factually supportable and are attributable to the Transaction.

The unaudited pro forma combined financial statements have been prepared for illustrative purposes only and are not necessarily indicative of what the combined company's financial position or results of operations actually would have been had the Transaction occurred as of the date indicated. The unaudited pro forma combined financial statements also should not be considered indicative of the future results of operations or financial position of either Solaris or MER.

The proposed transaction is subject to closing adjustments that have not yet been finalized. Accordingly, the pro forma adjustments are preliminary and have been made solely for the purpose of providing unaudited pro forma combined financial statements as required by SEC rules. Differences between these preliminary estimates and the final transaction accounting may be material.

SOLARIS ENERGY INFRASTRUCTURE, INC.

UNAUDITED PRO FORMA COMBINED STATEMENTS OF OPERATIONS

FOR THE YEAR ENDED DECEMBER 31, 2024

(share amounts and dollars in thousands, except per share amounts)

SOLARIS ENERGY INFRASTRUCTURE, INC.

NOTES TO UNAUDITED PRO FORMA COMBINED STATEMENT OF OPERATIONS

(share amounts and dollars in thousands, except per share amounts)

Note A - Description of the Transaction

On September 11, 2024, Solaris Energy Infrastructure, Inc. ("Solaris, Inc.") and Solaris Energy Infrastructure, LLC ("Solaris, LLC" and collectively with Solaris, Inc., "Solaris") completed the acquisition of 100% of the outstanding equity interest in Mobile Energy Rental LLC ("MER") in accordance with the Contribution agreement dated July 9, 2024 (the "Contribution Agreement"). Wherein members of MER contributed all equity interests in MER to Solaris in exchange for cash and equity consideration of Solaris (the "Transaction").

Note B - Basis of Pro Forma Presentation

The unaudited pro forma combined statement of operations have been prepared pursuant to Article 11 of Regulation S-X. The unaudited pro forma combined statement of operations should be read in conjunction with the separate historical financial statements and related notes of Solaris and MER.

The unaudited pro forma combined statement of operations are based on and have been derived from the following historical financial statements of Solaris and MER:

The Transaction is reflected in Solaris, Inc.'s historical consolidated balance sheet as of December 31, 2024 which was filed with the U.S. Securities and Exchange Commission on Form 10-K on March 5, 2025. The unaudited pro forma combined statement of operations for the year ended December 31, 2024 gives effect to the Transaction as if it had occurred on January 1, 2024.

The unaudited pro forma combined statement of operations have been prepared using the acquisition method of accounting in accordance with the business combination provisions of Financial Accounting Standards Board Accounting Standard Codification 805, Business Combinations, with Solaris representing the acquirer under this guidance. The unaudited pro forma combined statement of operations give pro forma effect to the consummation of the Transaction on the terms provided for in the Contribution Agreement. The unaudited pro forma adjustments reflect adjustments related to the application of the acquisition method of accounting wherein the purchase price consideration has been allocated to the assets acquired and liabilities assumed based upon management's estimate of what their respective fair values would be as of the date of the Transaction. Any excess of the purchase price over the fair value of identified tangible and intangible assets acquired and liabilities assumed will be recognized as goodwill. Preliminary fair value estimates may change as additional information becomes available, and such changes could be material, as certain valuations and other studies have yet to commence or progress to a stage where there is sufficient information for definitive measurement, including property and equipment, lease assets, and customer contracts and their related tax impact. Following the consummation of the Transaction, management will conduct a final review. As a result of that review, management may identify differences that, when finalized, could have a material impact on the unaudited pro forma combined financial statements.

The unaudited pro forma combined statement of operations do not give effect to the potential impact of any anticipated synergies, operating efficiencies, or cost savings that may result from the Transaction or of any integration costs.

Note C - Conforming Accounting Policies

At this time, Solaris is not aware of any material differences between the accounting policies used by Solaris and MER that would continue to exist subsequent to the application of acquisition accounting. Solaris' review of MER's accounting policies to determine if any differences in accounting policies require further reclassification of MER's results of operations or reclassification of assets or liabilities to conform to Solaris' accounting policies and classifications is ongoing. It is possible that Solaris' may identify additional differences between the accounting policies of the two companies that, when conformed, could have a material impact on these unaudited pro forma condensed combined financial statements.

Note D - Reclassifications

The following reclassification adjustments below were made to conform the presentation of MER's financial information to Solaris' presentation.

Note E - Transaction Accounting Pro Forma Adjustments

The pro forma adjustment relates to the incremental pro forma interest expense as a result of the additional financing obtained related to funding the Transaction with the assumption that such financing was obtained on January 1, 2024, and was outstanding for the entire year ended December 31, 2024.

On September 11, 2024, Solaris and certain of its subsidiaries entered into a senior secured term loan agreement (the "Term Loan Agreement") with Banco Santander, S.A. New York Branch, as administrative agent, and Silver Point Finance, LLC, as collateral agent, along with other participating lenders. Under the Term Loan Agreement, the lenders provided term loans totaling $325.0 million. Solaris utilized $162.3 million of the proceeds to fund the Transaction, with the remaining funds restricted for capital expenditures and are excluded from these pro forma. For purposes of the pro forma, Solaris has allocated $5.0 million of the total debt discount and issuance costs of $9.4 million to the pro forma adjustments on a pro-rata basis.

The borrowings under the Term Loan Agreement bear a variable interest rate, at Solaris' option, equal to either Term SOFR plus an applicable margin or the Base Rate (each as defined in the Term Loan Agreement) plus an applicable margin. Solaris utilized an assumed interest rate for the purposes of this pro forma of 10.8% consistent with its weighted average interest rate for the Term Loan Agreement.

A 1/8 of a percentage point increase or decrease in the estimated interest rate would result in a change in interest expense of approximately $203 thousand for the year ended December 31, 2024.

Represents the adjustments to record (i) the elimination of historical non-leasing depreciation and amortization expense and (ii) recognition of new depreciation and amortization expense related to fair values of identifiable property and equipment and intangible assets calculated on a straight-line basis. The amortization of intangible assets is based on the periods over which the economic benefits of the intangible assets are expected to be realized, which are subject to further adjustment as additional information becomes available.

Represents the adjustments to record (i) the elimination of historical depreciation of leasing equipment and (ii) recognition of new depreciation of leasing equipment expense related to the fair value of identifiable property and equipment classified as equipment held for lease on a straight-line basis.

Included in MER's equipment held for lease are "Construction in Progress" which represents deposits and progress billings paid to MER's suppliers for the purchase of turbines and other equipment that has not yet been delivered. Solaris expects to depreciate this equipment once it's delivered and ready for use in the next twelve months.

The pro forma adjustment to provision for income taxes of $5.7 million for the year ended December 31, 2024 relates to the estimated income tax consequences of the pro forma adjustments to income (loss) before income tax expense. Solaris utilized a historical effective combined United States federal and state income tax rate of 20.2%. While Solaris has considered the impact on the effective tax rate for the combined entity, this determination is preliminary and subject to change based upon the final determination of the combined entity's effective tax rate.

The transaction accounting pro forma adjustment to net loss (income) related to non-controlling interests of $1.5 million for the year ended December 31, 2024 primarily relates to the increase in non-controlling interest percentage as a result of issuance of 16.5 million Solaris LLC units to the members of MER. The other transaction accounting pro forma adjustment to net loss (income) related to non-controlling interests of ($2.7 million) for the year ended December 31, 2024 relates to the share of non-controlling interests in the other transaction pro forma adjustments.

The pro forma adjustment to income attributable to participating securities relates to the participating securities' share of the total pro-forma adjustments to net income.

The pro forma adjustments to earnings per share are as follows:

The Class B shares issued as part of the Transaction were not included in the calculation of pro forma diluted earnings per share for the year ended December 31, 2024 because the effect of including such potentially dilutive shares would have been anti-dilutive upon conversion.

The following number of weighted-average potentially dilutive shares were excluded from the calculation of pro forma diluted earnings per share including the pro forma effect of the equity consideration because the effect of including such potentially dilutive shares would have been antidilutive upon conversion: