Energy Grid Strain

Summary

A hyperscale data center of Project Tango's scale demands enormous, continuous electricity — often exceeding the power consumption of entire towns. This places extraordinary strain on the regional power grid, threatens reliability for existing customers, and could drive up utility rates for every household and business in Palm Beach County.

How Much Power Does a Data Center Use?

Modern hyperscale data centers consume between 30 and 150+ megawatts (MW) of power continuously. For context:

• 1 MW powers roughly 750-1,000 homes
• 100 MW powers roughly 75,000-100,000 homes
• A 3.69 million square foot facility at typical power densities could demand 200+ MW at full buildout

This is not peak or occasional demand — it is constant, 24/7 consumption. Data centers cannot tolerate even momentary power interruptions, requiring the grid to maintain maximum reliability at all times.

To put this in perspective, 200 MW is roughly equivalent to the total electricity demand of the entire city of Wellington, Florida (population ~65,000). Project Tango would effectively double the local power demand overnight.

Impact on Grid Reliability

Florida Power & Light (FPL) serves Palm Beach County and must maintain grid stability for all customers. Adding a massive new industrial load creates several risks:

• Transmission bottlenecks: The existing transmission infrastructure may not have the capacity to deliver hundreds of megawatts to a single point without upgrades
• Generation adequacy: FPL must either build new power plants or purchase additional electricity to meet the demand
• Grid stress during peaks: Florida's peak demand occurs during hot summer afternoons when air conditioning loads are highest. Adding a 200+ MW constant load reduces the reserve margin available for residential cooling
• Vulnerability to outages: When a large industrial load trips offline, it can create voltage and frequency instability affecting surrounding areas

FPL has already been managing increasing grid stress from population growth, electrification trends, and more frequent extreme weather events. A hyperscale data center would be one of the single largest loads on their system.

Rate Increases for Residents

When utilities must build new infrastructure to serve large industrial customers, the costs are typically spread across all ratepayers. This means Arden residents and other Palm Beach County households could see higher electricity bills to subsidize infrastructure serving Project Tango.

The pattern has played out in other regions:

• In Virginia's "Data Center Alley," residential electricity rates have increased as Dominion Energy invested billions in transmission infrastructure for data centers
• In Oregon, Portland General Electric sought a 17% rate increase partly attributed to data center load growth
• In Georgia, Georgia Power proposed a 12% rate increase driven in part by the infrastructure needed for new hyperscale facilities

Even if FPL negotiates a special industrial rate with the data center operator, the infrastructure investment (new substations, transmission lines, distribution upgrades) is capitalized into the rate base and paid by all customers over decades.

Renewable Energy Claims

Data center operators frequently claim their facilities will be powered by renewable energy. While these commitments are welcome, they require scrutiny:

• Renewable Energy Credits (RECs) allow facilities to claim "green" energy while actually consuming grid electricity generated from fossil fuels
• Solar and wind are intermittent — they cannot power a 24/7 data center without massive battery storage or gas-fired backup
• FPL's generation mix is approximately 70% natural gas, meaning most of the electricity actually flowing to the data center will come from fossil fuel combustion
• Building dedicated renewable capacity takes years and requires significant land

Backup Generation: Diesel Risk

Data centers maintain extensive backup diesel generator systems for grid outages. A facility of this scale would require dozens of large diesel generators, each capable of producing:

• Significant air pollution when operating (see Health Risks)
• Noise levels exceeding 100 dBA at the generator
• Fuel storage risks requiring thousands of gallons of diesel on site

These generators are tested regularly (typically monthly) and run during any grid disturbance, meaning the community would experience periodic diesel emissions even during normal operations.

What the Staff Report Confirms

The staff report (DOA/ZV-2025-01602) reveals that the developer has already executed a binding power service agreement with FPL with "strict timelines" to develop the required substations and begin utilizing power. The developer cites this agreement as the primary changed circumstance necessitating the expansion from 206,000 to 1,792,000 square feet of data center.

This binding commitment means the power infrastructure buildout is already in motion — adding urgency to the community's concerns about grid impact.

Read the full staff report analysis for more details.

What the Developer Claims

In February 2026, the developer's fact sheet makes several claims about power and energy:

"Any new electric infrastructure needed will be 100% funded by the project." The developer states that FPL's "special large-load rate structure" requires major energy users to fund all needed infrastructure and pay for all power used, "designed to protect existing residential and business customers from rate increases."

This claim requires scrutiny:

• FPL's rate base is shared: Even if the developer funds initial infrastructure, those assets may be capitalized into FPL's rate base and recovered from all ratepayers over time — the same pattern documented in Virginia, Oregon, and Georgia
• Grid upgrades cascade: Serving a 200+ MW load requires more than local infrastructure. Transmission upgrades, generation capacity additions, and system reliability investments affect the entire service territory
• The binding power service agreement confirmed in the staff report shows the infrastructure buildout is already underway — meaning ratepayer impact may already be in motion

"Backup power generation is not expected to be needed." The developer claims the adjacent FPL West County Energy Center provides enough redundancy that backup generators are unlikely. They hedge: "if needed, it will be battery or natural gas."

This claim is unusual for the data center industry:

• Virtually every hyperscale data center in operation maintains diesel backup generators, regardless of grid proximity
• No major cloud provider or colocation operator would commit billions in server hardware without guaranteed backup power
• The fact sheet does not explain what the 216,000 SF of "minor utility buildings" contain — they could house the backup generation that the fact sheet claims is unnecessary

"Data center operations do not produce emissions." While technically true for the servers themselves, the electricity to power them is generated primarily from natural gas (~70% of FPL's generation mix). At 200+ MW, this facility's indirect carbon footprint is estimated at 500,000+ metric tons of CO2 equivalent annually.

Read our fact-check of the developer's PR claims for the full analysis.

What You Can Do

Our electric grid serves everyone — it should not be strained to serve one industrial project. Stand with your neighbors and attend the July 15, 2026 County Commission hearing to demand a full grid impact assessment. Keep your purchase agreement, marketing materials, and HOA disclosures in a safe place — they may be important for building our case.