Case Studies >

Montgomery Solar Farm

  • Biscoe, North Carolina
  • 20.0MWp
  • Duke Energy


This extensive 20.0MWp solar farm project presented
some unique challenges for Blue Oak Energy’s electrical
and civil engineering teams due to the site’s rolling terrain and subtropical climate. By utilizing alternative engineering design software, Blue Oak Energy was able to achieve an accurate energy model that simulated energy production due to the varying degrees of solar array slope. Significant average rainfall and runoff in the area also meant high levels of erosion and sedimentation. Engineers addressed this by designing a total of eleven strategically placed catchment basins. In addition, the engineering team worked fluidly with a challenging construction schedule while also minimizing the overall system costs and land disturbance footprint. 


Blue Oak Energy provided comprehensive civil, electrical engineering, and structural engineering for this project. The project required additional coordination with the North Carolina Department of Environment and Natural Resources (DNER). As the major environmental authority
in the State of North Carolina, the NCDNER ensures storm water runoff controls – including erosion and sedimentation control standards – to protect adjacent properties, natural environments, and wetlands. 


Panel Type:  Hanwha Solar Q.Pro-64 modules 
Panel STC DC Rating: 260W and 265W
Panel Quantity: 106,080
Racking Type: RBI Solar
Foundation: Driven Pile
Inverter Type: Eaton Power Xpert 1670kW
Property: Approximately 101 acres
DC Voltage: 1000V
AC Voltage: 22.9kV


• Eleven (11) sedimentation basins with volumes ranging from .1 acre-ft to 1 acre-ft.; Blue Oak had to design temporary diversion ditches to convey storm water to these basins.

• This project follows the specific requirements for water quality relative to construction projects that disturb > 1 acre of soil, as governed by NCDENR. The calculations and measures implemented during construction differ from the process for California-based projects.

• Engineered an approximately 1-mile long generation tie line (gen-tie) from the project site to the point of interconnection.