Executive summary
This 40 MW utility-scale solar project is located in Rajkot, Gujarat. The site faces complex soiling challenges. These challenges come from a mix of inland cementitious dust and sticky coastal film. Local quarry activity and nearby haul roads make the problem worse. This causes uneven dust buildup across the solar array. Some strings degrade much faster than others due to heavy sediment.
Water scarcity is a major issue in this region. Limited groundwater and expensive tanker logistics make wet cleaning difficult. To solve this, Taypro deployed the HELYX semi-automatic waterless cleaning system. This solution removes the need for large amounts of water. The system allows for a controlled cleaning cadence of 3 to 10 dry cycles per month. We use NECTYR software to log every cleaning event. This provides the clear data that finance teams need. It helps them explain any month-to-month changes in the Performance Ratio (PR). This waterless approach protects the long-term energy yield of the 40 MW asset.
Environment and soiling at Rajkot, Gujrat – 40 MW Solar O&M Case Study
Managing Site-Specific Soiling Challenges in Rajkot
The 40 MW Rajkot site has a very difficult micro-climate. The dust profile is not uniform. Instead, the facility deals with two distinct types of buildup. First, there is inland cementitious dust. This dust is fine and can become very hard on the glass. Second, the coastal proximity adds a sticky film to the modules. This film binds the dust to the surface. This creates a thick layer that blocks sunlight.
The site layout increases these problems. Active local quarries are located near the plant. Heavy trucks use haul roads close to the solar strings. These trucks kick up massive amounts of sediment. As a result, strings near these roads experience much faster degradation. This creates significant performance gaps across the 40 MW plant. Traditional cleaning methods struggle to keep up with this uneven soiling. The site needs a more reliable and repeatable cleaning strategy to maintain its target Performance Ratio.
- Cementitious Impact: Hardened dust layers require effective mechanical removal.
- Coastal Effects: Sticky films make dust much harder to clear.
- Road Proximity: Haul roads create high-soiling zones near specific strings.
- Sustainability: Waterless cleaning is necessary due to regional water scarcity.
O&M before Taypro
Challenges of Traditional Manual Cleaning
Before the Taypro intervention, the Rajkot site relied on traditional maintenance methods. These methods were often reactive rather than proactive. The team struggled with the unpredictable nature of the dust. Because the soiling was uneven, manual cleaning could not cover the whole site effectively. Some areas were cleaned while others were neglected. This led to massive differences in power output between different rows.
Water availability was the biggest operational hurdle. Groundwater levels in the Gujarat region are often quite low. Relying on water tankers is a logistical nightmare. It is expensive and highly dependent on local supply. During peak dust months, water was simply not available in high volumes. This made it impossible to maintain a steady cleaning schedule. Without regular cleaning, the Performance Ratio (PR) would drop significantly. There was also a lack of data. The plant owners could not easily track when cleaning happened. This made it very hard to explain energy losses to project financiers.
Fleet and deployment at 40 MW
Deployment Strategy for the 40 MW Rajkot Asset
Taypro implemented a specialized fleet to protect the 40 MW Rajkot asset. We chose a procurement model based on OPEX. This model is highly capital-efficient for the project owner. It allows the plant to access high-end robotic technology without a large upfront cost. Under this service model, Taypro manages the equipment and the skilled manpower. This simplifies the long-term O&M workload for the site managers.
The fleet uses the HELYX semi-automatic cleaning robot. We chose HELYX because of its excellent mobility. It is a pick-and-place robot designed for distributed utility-scale plants. This flexibility is vital for the Rajkot site. The robot can move easily between different plant blocks. It can target specific high-degradation zones with high precision. We focus heavily on the strings near haul roads and quarries. These areas need more attention to protect the total plant output.
- Robot Type: HELYX semi-automatic waterless robots.
- Cleaning Method: Single-pass PBT brush technology.
- Deployment Focus: High-dust zones near quarry traffic and roads.
- Business Model: OPEX-driven service for better cash flow management.
- Mobility: Pick-and-place capability for scattered solar blocks.
Operations and monitoring
Optimized Operations and Fleet Monitoring
Maintenance at the Rajkot facility is now driven by data. We do not use arbitrary cleaning schedules. Instead, we use site-specific variables to optimize the Performance Ratio. Our team uses NECTYR, which is our advanced fleet management portal. This software allows us to log every single cleaning cycle. This creates a clear and transparent record for the asset owners.
The maintenance cadence is carefully planned. We perform between 3 and 10 waterless dry cleaning cycles per month. The exact frequency depends on real-time soiling data. We monitor the impact of the cementitious dust and coastal film constantly. If the dust levels rise, we increase the cleaning frequency. NECTYR provides the accountability needed for this strategy. It ensures that the high-risk zones near the roads always receive priority. This data-driven approach removes the guesswork from solar O&M.
- Digital Logs: NECTYR records every dry cleaning event.
- Financial Clarity: Logs explain PR variance to project finance teams.
- Safety First: Robotic activity stops during high-wind weather events.
- Adaptive Strategy: Schedules change based on real-time dust telemetry.
Results and impact
Results and Impact on Plant Performance
The deployment of Taypro’s robotic fleet has stabilized the Rajkot plant. We have successfully mitigated the severe output fluctuations. These fluctuations were once caused by heavy dust and coastal film. By using a consistent robotic schedule, we ensure the modules stay clean. The system performs exceptionally well in the hardest zones. This includes the areas near haul roads and active quarries.
The impact on plant management is significant. The transition to a logged, waterless strategy provides audit-ready documentation. Finance departments can now see exactly when cleaning occurred. This removes the uncertainty of historical PR drops. We rely on NECTYR-verified data rather than manual logs. This gives stakeholders high confidence in the site's health. The shift to a repeatable schedule has reduced PR volatility. This ensures the 40 MW asset remains a reliable source of power despite the harsh Gujarat environment.
- PR Stability: Significant reduction in performance volatility.
- Data Integrity: Audit-ready cleaning logs via NECTYR.
- Resource Savings: Drastic reduction in water consumption.
- Risk Mitigation: Better management of uneven soiling patterns.
Peer comparison and planning checklist
The Rajkot 40 MW project is part of our growing footprint in Gujarat. We provide similar high-performance O&M services across various scales in the region. You can view our other successful deployments in Gujarat through these case studies:
