Comparative Results for the nine months ended September 30, 2023 and 2022:
Revenue
Total revenue for the nine months ended September 30, 2023 and 2022 was $201.9 million and $199.0 million, respectively, and consisted of our Bitcoin Mining revenue, Data Center Hosting revenue, Engineering revenue, and other revenue.
For the nine months ended September 30, 2023 and 2022, Bitcoin Mining revenue was $129.0 million, and $126.2 million, respectively. The increase of $2.8 million was primarily due to an increase of 1,154 Bitcoin mined in the 2023 period as compared to the 2022 period as a result of an increase in miners deployed, partially offset by lower Bitcoin values in the 2023 period, averaging $25,818 per coin, as compared to $32,839 for the 2022 period, and an increase in the Bitcoin network difficulty. Additionally, we continued employing our power strategy to significantly reduce overall power costs. As described below, during the nine months ended September 30, 2023, we earned $66.1 million in power credits, which were received in cash or credited against our power invoices, as a result of temporarily pausing operations. The power credits equate to approximately 2,562 Bitcoin, as computed using the average daily Bitcoin prices for the 2023 period. During the nine months ended September 30, 2022, we earned $21.3 million in power credits, or the equivalent of approximately 649 Bitcoin, as computed using the average daily Bitcoin prices for the 2022 period.
For the nine months ended September 30, 2023 and 2022, Data Center Hosting revenue was $21.8 million, and $27.9 million, respectively. The decrease of $6.1 million was primarily due to lower revenue share from customers due to the lower Bitcoin values in the 2023 period, as noted above, combined with hosting fewer customers during 2023 as we continue to address legacy contracts.
For the nine months ended September 30, 2023 and 2022, Engineering revenue was $51.0 million and $44.9 million, respectively. The increase of $6.1 million was primarily attributable to an increase in data center development across the country. Our custom electrical products such as switchgear and power distribution centers are used as important components in data center development and in power generation and distribution facilities, and there has been increased demand for these products due to the continued increase in data center construction by developers, as well as the continually increasing worldwide demand for power.
Costs and expenses
Cost of revenue for Bitcoin Mining for the nine months ended September 30, 2023 and 2022, was $70.0 million and $51.8 million, respectively, an increase of approximately $18.2 million. As a percentage of Bitcoin Mining revenue, cost of revenue totaled 54.3% and 41.0% for the nine months ended September 30, 2023 and 2022, respectively. Cost of revenue consists primarily of direct production costs of Bitcoin mining operations, including electricity, labor, and insurance, but excluding depreciation and amortization, which are separately stated. The increase was primarily due to the increase in Bitcoin mining capacity at the Rockdale Facility, which requires more headcount and direct costs to maintain and support the Bitcoin mining operations. As noted below, during the nine months ended September 30, 2023 and 2022, we earned $66.1 million and $21.3 million, respectively, in power credits to be credited against our power invoices, as a result of temporarily pausing our operations to participate in ERCOT’s demand response and ancillary services programs. Our fixed-price power contracts enable us to strategically curtail our mining operations and participate in these programs, which significantly lower our cost to mine Bitcoin. These credits are recognized in Power curtailment credits on our Condensed Consolidated Statements of Operations, outside of cost of revenue, but significantly reduce our overall cost to mine Bitcoin. When netting the power curtailment credits allocated to Bitcoin Mining with the costs of revenue, the net costs as a percentage of Bitcoin Mining revenue were 21.4% and 34.6% for the nine months ended September 30, 2023 and 2022, respectively.
Cost of revenue for Data Center Hosting for the nine months ended September 30, 2023 and 2022, was $73.9 million and $44.4 million, respectively, an increase of approximately $29.5 million. The costs consisted primarily of direct power costs, with the balance primarily incurred for rent and compensation costs. The increase was primarily attributable to the significant increase in size of our Rockdale Facility over the period, which has more than doubled since 2021.
Cost of revenue for Engineering for the nine months ended September 30, 2023 and 2022, was $46.9 million and $40.5 million, respectively, an increase of approximately $6.4 million. The costs consisted primarily of direct materials and labor, as well as indirect manufacturing costs. The increase was primarily due to an increase in materials purchased, as well as additional labor required to support increased demand for our custom electricity transmission products. Increased competition for direct materials due to supply chain constraints contributed to additional costs, as well as inflationary pressure for labor in manufacturing.