Path-Q Solar
Would trenching be a major added expense for a ground-mounted solar system?
Answer
Trenching can be a major added expense when the array is far from the building or electrical equipment, the ground is rocky or difficult to restore, or special depth, conduit, drainage, or access requirements apply. It may be modest for a short, straightforward route, but only a site-specific plan can establish the amount.
Key points
- Cost drivers include trench length, soil and rock conditions, depth, conduit size, cable type, crossings, and restoration.
- The route should be coordinated with utilities, drainage, irrigation, septic systems, and property boundaries.
- Alternative equipment placement or an overhead route may reduce excavation but can introduce other design, appearance, or maintenance issues.
What it depends on
- Distance and route between array and point of connection
- Ground conditions and obstacles
- Electrical voltage, current, and conduit requirements
- Required restoration and site access
Risks and trade-offs
- Unidentified buried infrastructure can cause safety hazards, delays, or damage.
- A shorter route is not always feasible if it creates shading, voltage-drop, or maintenance problems.
- Poor restoration can create drainage, erosion, or landscaping issues.
Information you may need
- Scaled site plan with proposed cable route
- Utility-locate information and soil conditions
- Conduit and cable design
- Restoration requirements and itemized trenching allowance
Your next step
What to do next
Request a site-specific trenching plan and separate line items for excavation, conduit, wiring, crossings, and restoration.
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