Power Transmission
Medium and high voltage power engineering
Our power division engineers and builds switchgear, transformers and substations from 600V to 230kV. The work runs from generation to the point of use.
Capabilities
Our power services
Medium and high voltage engineering and construction, from generation to the point of use.
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Substation design & construction
New and existing substations from 600V to 230kV. We engineer, source and build the civil, structural and electrical scopes.
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Switchgear & protection systems
We specify, source, install, test and commission MV and HV switchgear, relays and protection coordination.
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Grid modernisation
Distribution automation, advanced metering, SCADA integration and smart grid upgrades that make the network more reliable.
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Power transformer services
Transformer installation, oil sampling, thermographic inspection and testing, through to maintenance and replacement.
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Electrical distribution
Primary and secondary distribution, overhead and underground, with padmount transformers and service upgrades.
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Utility infrastructure
Transmission line design and construction, right-of-way coordination, interconnection studies and project management.
Get in touch
Power your infrastructure
with confidence
Tell us the voltage class and the window you have. We'll plan the job around both.
Prefer to talk? (301) 953-4140
MHIC Lic# 133628 · Spanish-speaking staff available
Why Soleil Power
Safety, precision and
code compliance
Three principles run every MV and HV job we take on.
Safety comes first, on every crew and every site.
Engineering integrity. Our designs meet code and stand up to the daily demands of the grid.
One team owns the result, from the feasibility study through energisation to long-term support.
- Low voltage: 600V
- Medium voltage: 15kV
- Sub-transmission: 69kV
- High voltage: 230kV
Our approach
How a power
project runs
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Feasibility & studies
Load flow, short-circuit and protection coordination studies, plus interconnection feasibility.
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Engineering & design
Single-line diagrams, protection schemes, civil and structural design, and equipment specifications.
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Procurement & sourcing
We specify the equipment, vet the vendors, buy it and witness factory acceptance tests.
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Construction & installation
Foundations, steel, equipment setting and electrical installation.
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Testing & commissioning
System tests, relay calibration and energisation, coordinated with the utility.
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Maintenance & support
Preventive maintenance and asset management.
