Summary of Data Center Power Generation TAM and Competitive Analysis Industry Overview - The global data center power generation total addressable market (TAM) for onsite and standby power is projected to double to **$10 billion by 2028**, assuming a **15% CAGR** in capacity additions, increasing global data center capacity from **90 GW to 140 GW** [2][10] - The onsite power generation TAM is estimated at **$3.6 billion** and **3 GW** by 2028, with onsite power potentially accounting for **20-25%** of new capacity by 2027-28 and reaching **40%** by the end of the decade [3][10] Competitive Positioning - **Caterpillar (CAT)** is well-positioned to benefit from the shift to onsite power generation, while **Cummins (CMI)** faces structural challenges due to its reliance on diesel generators and limited natural gas capabilities [4][9] - The shift to onsite power generation is expected to cannibalize **$1.2 billion** and **3 GW** of diesel standby TAM by 2028, primarily impacting CMI [4] Financial Implications - For CAT, the data center power opportunity could be **13% accretive to EPS** by 2028, with contributions of **10%** from onsite and **3%** from standby power [6][9] - CMI's EPS accretion from the data center market is projected at **5%** by 2028, entirely from standby power [6][9] Valuation Insights - A sum-of-the-parts (SOTP) valuation framework suggests CAT's onsite power earnings could be valued at **47x**, while standby earnings at **30x**. CMI's valuation is lower, reflecting its reliance on standby power [7][67] - The market appears to have priced in CAT's data center optimism, while CMI may have approximately **10% upside** primarily from its distribution business [7][9] Service and Distribution Opportunities - CMI's distribution channel could double its TAM from **$1 billion/year** for equipment alone to **$2 billion/year** by 2028, as it also sells balance of plant via its distribution channel [5] - CAT's shift to onsite power creates a new aftermarket opportunity, potentially generating **$2 billion** in service revenue, as these engines run continuously and require more spare parts than standby generators [5][41] Key Market Dynamics - Data center operators are increasingly prioritizing onsite generation due to long grid access times, with interconnect queues extending up to **5 years** and large turbine lead times of **4-5 years** [3][18] - The trend towards onsite power generation is primarily a US phenomenon, with natural gas-powered generators favored over renewables due to the need for consistent power flow [18] Conclusion - CAT is positioned to capture significant growth in the data center power generation market, with a robust product portfolio for onsite power generation, while CMI's growth is constrained by its focus on standby power. The evolving landscape presents both opportunities and risks for investors in these companies.