Load, reliability & cost

Short answer

A large data center can equal or exceed the average electricity use of an entire county. Local reliability depends on available generation and transmission capacity, responsibility for upgrades, and whether the facility can ride through ordinary voltage disturbances without disconnecting abruptly.

County comparison, with a source warning

A commercial data aggregator estimates Sumter County consumption at approximately 406,990 MWh per year, equal to an average continuous load of 46.5 MW. The source warns that its data may be incomplete or inconsistent; Georgia Power and Sumter EMC should certify a current figure.

These are arithmetic comparisons. The planned 400 MW IT load is about 8.6 times the third-party estimate of Sumter County's average load. Cooling, pumps, lighting and conversion losses would place total facility demand above 400 MW.

At the August 4, 2026 community meeting, a Georgia Power representative said the utility had met with the developer and could serve the load (recording and summary). No will-serve letter accompanied the statement, which gave no service date or allocation of upgrade cost. Other planning material identifies 400 MW as the project's IT load.

Documented grid events

NERC documented simultaneous losses of approximately 1,500 MW and 1,800 MW of Northern Virginia data-center load following voltage disturbances. The initiating transmission faults were not necessarily caused by the data centers. The reliability problem was that many facilities reacted together, suddenly leaving generation greater than demand.

High consumption creates planning and cost challenges. Synchronized disconnection creates a separate operational risk.

Georgia context

The Georgia Public Service Commission reports that Georgia Power's projected seven-year need rose from 400 MW in 2022 to 6,600 MW in 2023 and later 8,500 MW as data-center proposals increased. In December 2025, the PSC approved 9,985 MW of new generation, approximately 80% expected to serve data centers. Statewide customer protections do not establish capacity at the Sumter County substation or transmission path.

Residential solar and batteries

A voluntary household program could improve outage resilience and reduce some peak demand. It cannot cancel a large round-the-clock data-center load.

Important limits:

• Ordinary grid-tied solar shuts down during an outage unless islanding equipment is installed.
• Batteries shift energy; they do not create energy during a long cloudy period.
• Annual solar production equal to annual household use does not mean the home is physically off-grid.
• Georgia Power's cited residential tariff limits systems to 10 kW AC and pays exports below retail rates.
• Large distributed fleets require safe utility interconnection and voltage planning.

About the proposed community energy resilience program

The report's recommended community benefit is a developer-funded portfolio, not a flat universal grant: efficiency work first, household solar with roughly one day of critical-load battery backup (planning allowance about $40,000–$55,000 per participating dwelling, anchored to the NREL 8 kW / 12.5 kWh benchmark), community solar and storage shares for renters and unsuitable roofs, neighborhood resilience hubs, and an emergency-services fund.

Funding scales with the project instead of being a fixed demand: an illustrative $500,000–$1,000,000 per approved MW base endowment deposited phase by phase, an annual per-MWh operating contribution, and adders triggered by measured impacts (generator runtime beyond emergency limits, attributed power-quality events, residential curtailments). At 100 MW that implies a $50–100 million base plus ongoing contributions.

The program would also create local work in energy audits, weatherization, wiring, roofing, HVAC, solar and battery installation. Competitive procurement should include local-hire and apprenticeship requirements.

Conditions that matter even without a household grant

• Firm utility service dates and capacity for every phase
• Developer responsibility for attributable infrastructure and stranded costs
• Minimum bills, deposits, and long-term financial security
• Ride-through settings and controlled load ramps
• Curtailment before firm residential load during declared emergencies
• Published interconnection, stability, harmonics, and contingency studies
• Annual demand, outage, transfer, and curtailment reporting

The will-serve letter, load schedule, and any development agreement are records held by the utility department, the county, and the Development Authority. See how to obtain the records and reach the officials, and the contact page for the same roster with each official's published e-mail address.