Government + Utility

PV Plant Designs



  • Site plans with major equipment placement
  • Full detailed electrical engineering & design
  • Medium voltage (MV) utility grid interconnection designs
  • Substation engineering and design
  • Full NEC and NESC compliance calculations
  • Supervisory Control And Data Acquisition (SCADA) system design

Medium Voltage Interconnections


  • Substation designs at 12.47 kV, 21 kV, and 34.5 kV
  • Overhead and underbuild line design
  • Protection system engineering & design
  • Cable & transformer specification design
  • ETAP software studies including:
    • Coordination studies
    • Short circuit studies
    • Arc flash studies
    • Load flow studies
    • Cable thermal ampacity analysis


Government Solar Projects

Jolon, CA
2 MW
Fort Detrick , MD
18.6 MW
Potomac Edison

Utility Solar Projects

Rattlesnake, CO
21.76 MW
United Power
Hazlehurst, GA
72 MW
Denmark, TN
19.9 MW
Millington, TN
53 MW

Case Studies

Fort Hunter Liggett Army Base

2 MW
As a key member of the design-build team, McCalmont Engineering’s drawings were the main portion of the design submittal to the U.S. Army Corps of Engineers. McCalmont Engineering served as the Engineer of Record and primary design subcontractor, and also had responsibility for approximately half the procurement for the project (modules, inverters, and rack mounting system). McCalmont’s designers and engineers coordinated the preliminary physical layout drawings for the positioning and elevation of the solar array and other equipment. The McCalmont Engineering team also developed the DC & AC electrical single-line diagram (SLD), wire calculations, and conduit schedule and routing.