Solar Farm Inspection

Solar operations run on performance data. Every faulty module, string failure and connector issue quietly erodes output until someone finds it.

Solar inspection with an automated drone lets operators find those faults far more often, without scheduling an inspection contractor for every cycle.

Traditional drone programs struggle to keep pace. Contractor inspections are scheduled, not on-demand, so issues accumulate between visits and a manual thermal sweep can take weeks per cycle.

What is Solar Farm Inspection?

Solar farm inspection is the use of automated drone systems, remote operations technology and automated data workflows to perform routine thermal and visual inspection across a solar asset.

Rather than operating drones manually, missions are pre-planned and automatically executed according to the inspection schedule.

For example:

• Thermal sweeps of the arrays can run overnight.
• Visual inspections can check for soiling, vegetation and physical damage.
• Commissioning and handover capture can verify a new build.
• Substations and inverter stations can be inspected on a schedule.
• Storage and BESS sites can be monitored alongside the array.

Captured data is automatically transferred into the asset-management systems operators already use, turning point-in-time surveys into a continuous record.

Common Solar Farm Inspection Workflows

Thermal Array Inspection

Automated thermal sweeps detect faulty modules, string failures and hot-spots across the array, often overnight, without an inspection contractor on site.

Visual Condition Inspection

Regular visual capture identifies soiling, vegetation encroachment and physical damage affecting output.

Commissioning and Handover

During construction and commissioning, drones capture defects and verify build quality at EPC handover.

Substation and Inverter Checks

Thermal and visual inspection of substations and inverter stations supports condition monitoring across balance-of-plant.

Defect Classification

Captured data feeds automatic defect classification and work-order generation, closing the loop from detection to repair.

These workflows can be scheduled on a fixed cadence or run on-demand, replacing annual point-in-time surveys with a continuous record.

The Role of BVLOS

Utility-scale solar farms cover areas that cannot be efficiently inspected within visual line of sight (VLOS).

Beyond visual line of sight (BVLOS) operations allow drones to inspect an entire site, and campaigns across a portfolio, while maintaining compliance and safety.

BVLOS capability enables:

• Coverage of large, fenced sites
• Greater inspection efficiency
• Reduced personnel requirements
• Increased inspection frequency
• Centralised management of multiple sites

For asset owners and O&M providers, BVLOS is a key enabler of continuous solar inspection.

How Solar Farm Inspection Is Delivered

Effective solar inspection requires more than a drone. It combines automated flight hardware, remote operations, governance controls and automated data delivery into a repeatable workflow.

At Sphere, solar inspection programs combine:

• HubT for permanent deployments at operational farms, integrated with existing infrastructure for routine flights on a fixed cadence.
• HubX for portable or relocatable deployments supporting project-stage and commissioning work across an EPC portfolio.
• The Curo software suite to govern, run and deliver every flight: CuroRPA for compliance and governance, CuroROC for remote operations, and CuroInsights for data delivery.

Together, these technologies help solar operators scale inspection beyond scheduled contractor visits.

Benefits of Solar Farm Inspection

Solar operations adopting automated inspection can achieve benefits across performance, cost and accountability.

1. Faster Defect Detection: Find faults in days instead of months.
2. Lower Inspection Cost: Reduce cost per MW compared to contractor inspections.
3. Continuous Cadence: Replace annual surveys with an ongoing record.
4. Defensible Evidence: Maintain repeatable performance evidence for warranty claims.
5. Reduced Downtime: Address underperformance before it compounds.
6. Scalable Operations: Inspect a portfolio of sites through a centralised operating model.

Assess Your Solar Asset's Automation Potential

Every solar asset is different. The right mix of HubT and HubX depends on your site size, your inspection cadence, and how defect data feeds your O&M workflow.

A Sphere team member can assess your operation, identify the workflows worth automating first, and model continuous inspection against your current contractor costs.

Book a solar inspection demo to see how automated inspection fits your operation.