Utility Scale

Value-engineered solutions for utility scale solar PV, energy storage, and microgrid projects.

Full-Scope Engineering for Utility-Scale Solar & Storage

McCalmont Engineering delivers complete electrical engineering for utility-scale solar PV and battery energy storage plants — from preliminary site viability analysis and interconnection studies through PE-stamped construction documents. We design every part of the system in-house, including DC and AC engineering, medium-voltage interconnections, and substation design up to 34.5 kV. Our team has engineered projects as large as 800 MW across the country, and our professional engineers are licensed in more than 40 states.

Medium-Voltage Interconnections to 34.5 kV

Few engineering firms design medium-voltage interconnections in-house. We do — including overhead and underbuild line design, protection-system engineering, and cable and equipment specification up to 34.5 kV, all the way to the substation point of demarcation.

ETAP Electrical Studies & Grounding Analysis

Our engineers perform the full suite of power-system studies — coordination, short circuit, arc flash, load flow, and cable thermal ampacity — using ETAP software, plus grounding studies with WinIGS including step-and-touch-potential analysis in compliance with IEEE and NEC standards.

PV Plant Designs

Site plans with major equipment placement
Full detailed DC & AC electrical engineering & design
Medium voltage (MV) utility grid interconnection designs
Engineering and design to substation point of demarcation
Full NEC and NESC compliance calculations
Construction Admin (CA) including submittal & RFI review

Medium Voltage Interconnections

Project engineering up to 34.5 kV
Overhead and underbuild line design
Protection system engineering & design up to 34.5kV
Cable & equipment specification design
ETAP electrical studies including:
- Coordination studies
- Short circuit studies
- Arc flash studies
- Load flow studies
- Cable thermal ampacity analysis