16.Related Party Transactions

Solaris Energy Management, LLC

We have an administrative services arrangement with SEM, a company owned by William A. Zartler, our Founder and Executive Chairman, for the provision of administrative services at cost. In addition, SEM provides office space and services for equipment and supplies to us under the administrative services agreement.

For the years ended December 31, 2023, 2022 and 2021, we incurred $0.7 million, $0.6 million and $0.6 million, respectively, of expense for these services, which is included in “General and Administrative” expenses on the consolidated statements of operations.

We had no accrued payables to SEM at December 31, 2023 and $53 thousand in accrued payables to SEM at December 31, 2022. As of December 31, 2023 and 2022, we had a prepaid balance to SEM of $0.2 million, respectively, to cover future rent and other expenses.

Solaris Energy Capital, LLC

There are certain de minimis general and administrative expenses that are paid on our behalf by Solaris Energy Capital, LLC, a company owned by William A. Zartler, and are recorded in general and administrative expenses. We had no accrued payables to Solaris Energy Capital, LLC as of December 31, 2023, and the accrued payables as of December 31, 2022 were de minimis.

Blanco Aviation, LLC

We are a party to an aircraft “dry” lease arrangement with Blanco Air Services, LLC, a company owned by William A. Zartler, for the use of certain aircrafts billed at an hourly rate. We incurred expense of $78 thousand, $76 thousand and $70 thousand for the years ended December 31, 2023, 2022 and 2021, respectively, which is recorded in general and administrative expenses. We had no accrued payables to Blanco Aviation, LLC as of December 31, 2023, and the accrued payables as of December 31, 2022 were de minimis.

Vision Resources, Inc.

We purchase brackish water for use in our Water Solutions activities from Vision Resources, Inc (“Vision”). Vision is a Legacy Owner of Solaris LLC. For the years ended December 31, 2023, 2022 and 2021, we made purchases of $2.0 million, $1.4 million and $1.5 million, respectively, for water and services. Accrued payables to Vision as of December 31, 2023 were $79 thousand, and we had no related accrued payables to Vision as of December 31, 2022.

We also rent office space from an affiliate of Vision in Carlsbad, New Mexico and have incurred rent expense of $0.2 million for each of the years ended December 31, 2023, 2022 and 2021.

ConocoPhillips

We and ConocoPhillips, one of our principal owners, have a 13-year water gathering and handling agreement, pursuant to which ConocoPhillips dedicates all the produced water generated from its current and future acreage in a defined area of mutual interest in New Mexico and Texas. As of December 31, 2023 and 2022, we had a receivable of $23.0 million and $46.0 million, respectively, from ConocoPhillips that was recorded in “Accounts Receivable from Affiliate” on the consolidated balance sheet. As of December 31, 2023 and 2022, we had a payable of $0.9 million and $3.0 million, respectively, to ConocoPhillips that was

recorded in “Payables to Affiliate” on the consolidated balance sheet. The following table shows revenue and expenses from ConocoPhillips:

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Operating expenses reimbursed to ConocoPhillips are related to ConocoPhillips’ costs for operating certain assets on our behalf between closing and the transfer of the acquired assets and other ongoing operating expenses.