Plans for a €3 billion ($3.52bn) data center campus in County Kildaire, Ireland, have been revised to include more renewable power, the developer has said.

Herbata Ltd is planning the three-hectare campus at Jigginstown, Halverstown, and Newhall, Naas, on lands bound to the east by the M7 Business Park.

It will comprise six two-story data center buildings, each with a 24,755 sqm (266,460 sq ft) data hall offering 30MW of capacity, giving the campus 180MW at full build-out.

The scheme was first announced in August 2024, but following discussions with Kildaire County Council, Herbata has made some changes in a bid to curb electricity use and carbon emissions.

Now it will obtain 50 percent of its power from renewable energy sources via Power Purchase Agreements, with the other half coming from an on-site gas-fired power plant. Though natural gas is a polluting energy source, Herbata wants to transition to hydrogen power, and says the campus will eventually draw all its energy from burning hydrogen.

The power plant will also have a facility to process biomethane, a gas produced from farm waste.

CEO Gerry Prendergast told the Irish Times that the company had reduced the predicted carbon emissions of the campus. The original plans said it would produce 28 million tons of carbon over the lifetime of the data centers.

“We had discussions with Kildare County Council and we got that down to six million tons, and then we got it down to 4.5 million tons over the life of the project,” Prendergast said.

The council is due to make a decision on the application, which has been pending since August 2024, by the end of August this year.

Naas has two sites that have been earmarked for data center use in the council’s 2021-2027 Naas Local Area Plan. Microsoft has previously confirmed it is planning a data center campus on one of the sites, though the tech giant said earlier this month that it was shifting its focus away from Ireland because of power constraints.

Elsewhere in the county, Davy Group and the Liffey Sub-Fund are developing a data center campus on a former HP campus in Barnhall Meadows, Leixlip.