Custom Off-Grid Solar Power for Seismic Monitoring at the Nevada National Security Site

Powering a Remote Seismic Monitoring Station

MSTS manages and operates the NNSS for the U.S. Department of Energy’s National Nuclear Security Administration. The site supports highly specialized scientific, engineering, and national-security missions—including work that depends on reliable monitoring equipment in remote locations.

The 123-STG-72D62 was designed as a fully functional, all-in-one, off-grid power system for a seismic monitoring station.

Remote monitoring applications present a distinct set of challenges. Equipment must remain operational where utility power may be unavailable, site access may be limited, and environmental conditions can be demanding. The power system therefore needed to combine dependable energy generation, storage, control, and remote system visibility in one integrated solution.

123eSolar engineered the system specifically for this application rather than adapting a standard, one-size-fits-all product.

A Complete, Integrated Solar Solution

The delivered 123-STG-72D62 provides a self-contained platform for generating, storing, and managing energy at the monitoring location. Its integrated design reduces the complexity of deploying separate field components while providing the independent power needed to support continuous seismic instrumentation.

A cellular-band wireless connection allows authorized personnel to remotely monitor key operating conditions, including:

• Solar-power production
• Electrical load consumption
• Battery capacity and system status
• Diesel-engine operating conditions
• Remote diesel-engine control

These capabilities provide greater visibility into system performance without requiring personnel to travel to the remote installation for routine status checks. The combination of solar generation, battery storage, diesel-engine integration, and remote monitoring creates a resilient power platform for a demanding field application.

The completed system was delivered ready for its intended off-grid mission, giving the project team a purpose-built energy solution designed around the monitoring station’s operational requirements.

Custom Engineering for Specialized Missions

Projects like the 123-STG-72D62 demonstrate the value of application-specific power-system design. Remote scientific and government installations often have requirements that cannot be satisfied by ordinary portable generators or standard solar packages.

By evaluating the equipment load, operating environment, autonomy requirements, communications needs, and deployment conditions as a complete system, 123eSolar can develop solutions suited to the realities of each location and mission.

The January 2026 delivery represents another successful example of our ability to provide integrated renewable-energy systems for remote, technically demanding applications.

Measured Performance in the Field

The system’s inverter records its operation every five minutes and reports over the cellular link. The figures below are taken directly from those records.

Testing began on July 1, 2026, and the system entered full deployment in August.

From July 1 through September 13, 2026:

• 1,863 kWh produced by the solar array
• 1,737 kWh delivered to the load
• 50 kWh supplied by the diesel generator, equal to less than 3% of the energy the load used
• No diesel energy at all from August 20 through August 31

From September 7 through September 13, the load averaged 1.4 kW around the clock. On each full day from September 8 through September 13, the array produced between 34.7 and 38.1 kWh.

Over the first thirteen days of September, a generator-only system would have run for 312 hours. The diesel engine in the 123-STG-72D62 ran three times, for about four hours in total.

On September 6, the array produced 12.2 kWh while the load used 22.1 kWh. By 5:14 the next morning, the battery had fallen to 31%. The diesel engine ran from 5:14 to 8:04 AM and stopped with the battery at 56%. That is the Tri-Brid™ design working as intended: solar and storage carry the load, and the engine runs only when it is needed.

On September 14, the battery carried the load through the night, returned to full charge by 1:35 PM and still held 92% at 7:15 PM, with the load drawing 1,170 W. The generator did not run.

Built for Power Beyond the Grid

Whether the application involves environmental instrumentation, communications, security equipment, scientific research, or infrastructure monitoring, 123eSolar designs off-grid power systems for locations where dependable energy cannot be taken for granted.

The 123-STG-72D62 delivered for seismic monitoring at the Nevada National Security Site reflects that commitment: custom engineering, integrated functionality, remote system visibility, and reliable off-grid power—built around the mission.