As utility-scale solar grows fast throughout the United States, operators are facing environmental and operational issues similar to those seen in the Australian solar business. Post-construction performance – fire danger, harsh heat, vegetation growth, and equipment dependability – has become as important as the project itself.
Extended Defects Liability Periods
In Australia, the usual post-construction period for the utility-scale solar business is a two-year defects liability period (DLP). During this period, the engineering, procurement, and construction (EPC) provider is responsible for the operations and maintenance (O&M) of the solar project, often at the point of practical completion, more often called significant completion in North America.
This norm is market-driven, not legislatively imposed. In EPC project contracts, most lenders and investors want 24 months DLP. DLPs often set forth obligations that the EPC has once construction is complete. This imposes continuous requirements on the EPC contractor to maintain, monitor, research, and repair the site.
In practice, the extended DLP model switches the emphasis from failure reaction to active protection of long-term asset performance. It decreases early-life performance risk for owners. It provides EPCs with earlier awareness of design or installation flaws that might otherwise show up after warranties have expired. The DLP standard in Australia is quite different from most EPC contracts in the United States, where a one-year repair time after major completion depends on warranties, corrective provisions, and statutory legislation.
This may seem to increase burden and risk, but the technique provides a useful chance to more effectively manage the post-construction phase and to guarantee a seamless transition from construction to operations.
PCL Construction’s solar and storage team has completed three utility-scale projects totaling almost 400 MWAC in Australia, and our methods for O&M might be adopted as solar power continues to evolve throughout the United States.
Managing Fire Risk for High-Heat Solar Markets
The climate of Australia has lengthy dry spells with unexpected downpours, similar to the patterns seen in southern U.S. states from Arizona to Georgia. The extreme heat causes obstacles for solar generation.
One of the biggest operational hazards is fire, as you would expect. In our tropical environment, grass may grow 100 mm (4 in.) every week, with the result that there is a constantly high fuel load on the site. Even mowing may be a fire threat, so it’s important to avoid cutting dry grass on hot, windy days.
To reduce the danger, operators are progressively using AI-powered fire and smoke detection systems that monitor the whole facility. These technologies can identify heat events early, enabling operations teams to respond quickly and avoid tiny concerns from becoming big problems.
Wildlife Control Without Sacrificing Safety
Animals and wildlife may create operational problems. Grazing may keep the grass short and lessen fire danger, but animals might become trapped in or gnaw on exposed cables, creating their own problems. There are, of course, the native animals such as spiders and snakes to contend with, but happily solar facilities are free of tree risks – and no drop bears to worry about!
To cope with such issues, appropriate cable management solutions may be put in place, keeping cables out of reach and safe from grazing animals. These approaches help operators keep vegetation healthy and installations safe and operating.
The Introduction of Condition-Based Maintenance
When it comes to O&M, there are two main types of maintenance performed:
- Preventive maintenance – Planned and scheduled on a weekly, monthly, or annual basis
- Corrective maintenance – Fixing broken or malfunctioning components
The condition-based maintenance is between these two techniques. An inverter running 15°C (about 27°F) hotter than the other inverters may not trigger an alert. Operators may observe component performance and take action before problems need corrective maintenance instead of waiting for a fault occurrence.
This is made possible with powerful analytics capabilities that go beyond on-site, event- and alarm-driven troubleshooting. By capturing site history data at a granular level, operators may undertake deeper root cause analysis, analyze performance patterns, and proactively create predictive maintenance plans for high-risk components before problems emerge.
In many situations, these insights sparked action weeks prior to a forced outage due to component failure. This method helps to increase site output and decrease downtime.
In addition, strong supply chain management processes provide operators with more options for long lead time spare parts, helping further shorten site downtime.
Remote operations centers, or off-site monitoring facilities, provide operators the ability to act on subtle equipment insights and make more proactive, data-driven choices.
What Proactive O&M Looks Like in the Trenches
The day begins early with a complete site examination for damage, possible fire concerns, or misaligned trackers. Managers set tasks for preventive maintenance, monitor the SCADA system, and resolve problems as they emerge. Once it’s constructed, we monitor and maintain our client’s facilities to prevent issues from occurring. Like a good mechanic keeping a vehicle running smoothly, our operators maintain sites producing electricity with little interference. We are continually upgrading and continue to improve scheduling and operational efficiency.
Solar Success Translation Experience
Australia’s experience with utility-scale solar O&M highlights the need for proactive maintenance, strong monitoring, and flexible methods to address environmental concerns. Operators may use lessons from the current momentum for solar in the U.S. to improve reliability and increase energy output. Whether it’s fire and wildlife management, condition-based maintenance, or off-site monitoring, these approaches provide practical insights that help U.S. projects function effectively, safely, and sustainably. We want U.S. operators to collaborate in adapting these standards locally and to share thoughts on best practices.
