Six Checks to Strengthen Disaster Prevention Measures in Solar Power Plant Construction

Solar power plant construction involves multiple stages—site formation, foundations, racking installation, module installation, wiring, connection to power reception and transformation equipment, and pre-commissioning checks—that often overlap over long periods. Sites are frequently extensive and can include slopes and unfinished ground, temporary access routes, coexistence of heavy machinery and personnel, outdoor high-temperature work, and close work near live parts; many factors can lead to disasters. Therefore, disaster prevention measures should not rest solely with safety officers but must be strengthened as a system across the entire construction team, including site agents, chief engineers, foremen, workers, and subcontractors.

When an accident or disaster occurs on site, it affects not only human injury but also work stoppage, increased corrective costs, a loss of trust from the client, and deteriorating relations with neighbors, substantially impacting the overall construction. Moreover, serious disasters do not always occur only in special situations. Frequently, they are triggered by commonplace lapses in checks—vague daily pre-work inspections, insufficient sharing of hazardous points, procedures that do not fit site conditions, or delayed judgment in response to weather changes.

This article organizes and explains six essential checks to strengthen disaster prevention measures in solar power plant construction. Not ending with formal safety confirmations, it delves into practical perspectives for actually reducing accidents: where to look, what to decide, and how to operate. It will be useful not only for site personnel who want to review their safety management system, but also for those who want to refine concrete safety confirmation items for daily morning meetings and progress meetings.

Table of Contents

• Why strengthening disaster prevention measures is indispensable in solar power plant construction

• Check 1: Are the pre-work hazard predictions and role assignments appropriate for site conditions?

• Check 2: Are the terrain, ground, access routes, and heavy equipment traffic lines reasonable?

• Check 3: Is the temporary works plan designed to prevent falls, trips, and struck-by or falling-object incidents?

• Check 4: Is electrical work management thorough enough to prevent electric shock, short circuits, and fires?

• Check 5: Are the stop-work criteria for sudden weather changes, heat, and natural disasters clear?

• Check 6: Do the communication system, education, records, and corrective action mechanisms function?

• Common weaknesses of sites where disasters are likely to occur

• How to implement operations that make disaster prevention measures stick

• Conclusion

Why strengthening disaster prevention measures is indispensable in solar power plant construction

A characteristic of solar power plant construction is that it takes place outdoors over wide areas with many trades progressing continuously and in parallel. During site formation and leveling, main hazards include ground and slope instability, mud, and contact with heavy machinery. During racking and module installation, risks increase from being caught while materials are moved, slipping, falling, and strain from poor posture. In wiring and connection work, electrical hazards associated with temporary power and DC circuits become prominent. Seasonal risks also change—heatstroke in summer, sudden gusts and heavy rain during typhoon season, and freezing or strong winds in winter.

Thus, safety measures cannot simply be fixed once and applied unchanged throughout the project. Risks must be updated by construction stage, and the perceived hazards must be adjusted on a daily and hourly basis. In practice, however, safety plans drawn up at the start of work are often not revisited sufficiently, so changes in site conditions are not reflected. This creates gaps in disaster prevention measures.

Also, because solar power plant sites are often long and spread out, and different areas can have varying elevation and progress, the level of hazard is not uniform even within the same site. In one area heavy machinery may be operating while in another, wiring or material hoisting is underway. In such an environment, local hazard recognition at each work location is as important as overall optimized safety management.

Strengthening disaster prevention measures is not simply adding more rules. It means sharing a site-appropriate understanding of hazards, detecting dangerous conditions early, and building a system that can flexibly modify work methods. The six items below are practical checks to accomplish that.

Check 1: Are the pre-work hazard predictions and role assignments appropriate for site conditions?

The starting point of disaster prevention measures is to clarify, for that day’s work: what hazards exist, who will check what, and who will stop work in case of abnormal conditions. If this is ambiguous, no matter how much equipment or protective gear is provided, accidents will not decrease.

It is important not to let hazard prediction end as abstract slogans. Expressions like “watch out for trips,” “beware of heavy machinery,” or “beware of electric shock” alone do not readily translate into worker behavior. What is needed is concretization based on that day’s site conditions. You must drill down and share information such as whether the access route is slippery from yesterday’s rain, whether the temporary material storage location has changed increasing transport distance, whether strong winds are forecast from midday, or whether there will be overlapping work with another area.

In pre-work checks, it is also important not only for the person in charge to give instructions but for each foreman and worker to be clear about what they will observe and judge at their post. If it is clear who will inspect hazardous spots first, who will monitor separation from heavy machinery, who to report to when temporary materials are defective, and who will coordinate voice warnings before energization, hesitation decreases and hazards are nipped in the bud.

In solar power plant construction, multiple subcontractors often work on site and understanding of safety rules can vary. A dangerous tendency is for each company to focus only on its own tasks and overlook interactions with the surroundings. Many disasters occur not from single operations but when processes overlap. Therefore, pre-work meetings must confirm not only each team’s work plan but also points of contact with adjacent tasks.

To prevent hazard prediction activities from becoming a formality, it is essential to update them according to site changes rather than merely reading out past near-miss reports. A route that was fine yesterday may become hazardous today because material deliveries have narrowed it. A slope that was dry yesterday can become prone to collapse after this morning’s rain. Assuming the site will change, rearranging daily check items leads to strengthened disaster prevention measures.

At sites with robust pre-work checks, morning meetings and briefings are not mere rituals but forums to align a high-resolution understanding of that day’s hazards. Conversely, at sites where accidents are frequent, work procedures and safety directives may exist, but they are poorly adapted to actual site conditions and personnel do not share a common awareness. First, review whether, for today’s work, everyone can discuss who will look at what and how they will act in abnormal situations.

Check 2: Are the terrain, ground, access routes, and heavy equipment traffic lines reasonable?

In solar power plant construction, terrain conditions greatly influence safety. Unlike work in a flat, organized factory, there are many situations where the ground itself is a hazard: partly formed ground, slopes, areas near embankments, and unstable temporary routes after spreading crushed stone. When strengthening disaster prevention measures, the first thing to check is whether the plan for ground and routes allows workers, vehicles, and heavy machinery to move safely.

Accidents tend to occur at sites that prioritize schedule and postpone temporary route construction. If work proceeds on the assumption “it’s passable for now,” risks increase: workers’ feet get stuck in mud, balance is lost during transport, handcarts or small carriers tip, and people enter heavy machinery swing areas. On large sites, workers may take dangerous shortcut routes despite official traffic rules, so formal rules may not reflect actual behavior.

Therefore, merely installing routes is insufficient; you must verify them by observing people walking, materials being transported, and vehicles moving. Continuously confirm whether pedestrian and heavy-equipment traffic lines are not ambiguously intersecting, whether temporarily stored materials are encroaching on routes, whether steep gradients increase hazards during manual transport, and whether puddles or softening occur after rain.

It is also important not to underestimate changes in ground conditions. The surface may look dry while only the top layer is firm and the underlying ground is soft. For vehicle or aerial work platform entry, temporary storage of heavy items, or installation of support legs, you must fully consider bearing capacity and settlement risks. In solar projects, both large and small machines and transport vehicles are frequently used, so small depressions or steps can cause trips, falls, or contact accidents.

Preventing heavy-equipment accidents requires traffic-line management that does not leave everything to operators: it should include guidance, blind-spot control, and access restrictions. On large sites, machines tend to be spread out and appear to be movable anywhere; workers can become accustomed to the danger and lax about separation. Separate areas where machinery operates from areas where people continuously enter as much as possible; where proximity is unavoidable, specify stop confirmations, signaling methods, and evacuation positions.

Near embankment edges and slopes, pay attention not only to slips and falls but also to rolling-off of materials and tools. On sites with elevation differences, consider the impact on lower areas as well as your own footing: tools or components falling from upper levels can strike people below, and the larger the site, the easier it is to miss vertical-direction hazards.

If you want to strengthen disaster prevention measures, first reassess whether movement on site itself is safe. Safe construction starts with safe access routes and traffic lines. Sites that are complacent about terrain and ground conditions will see an increase not only in major disasters but also in everyday near-misses that eventually lead to serious accidents.

Check 3: Is the temporary works plan designed to prevent falls, trips, and struck-by or falling-object incidents?

Although solar power plant construction may be perceived as involving relatively little work at height, there are many risks of falls, trips, and falling or flying objects. Work on sloped ground, movement near the top of slopes, use of temporary scaffolds and access equipment, loading and unloading on truck beds, and work around racking all present many situations where falls or trips can occur.

When strengthening disaster prevention measures, it is important to plan the necessary temporary works for each work location from the outset and not to omit them based on site judgment. A common problem is complacency: short-duration tasks are “okay,” low locations are “not a problem,” or repeated tasks breed overconfidence. However, falls and trips tend to occur particularly in short or familiar tasks because attention wanes and preparations are easily skipped.

For example, on slope-edge work, a slight change in body orientation or the condition of the footing can lead to a slip. When moving between racks, components, cables, fasteners, and temporarily stored materials become trip hazards. After rain or during morning dew, steel members, paved surfaces, and crushed-stone roads become more slippery, changing the danger level from usual conditions. Thus, temporary works plans must be reassessed according to the day’s conditions, not just based on drawings.

Measures against falling objects are not limited to high places. Ground-level activities such as unloading from trucks, temporary storage of materials, unstable transport configurations, and temporary placement on slopes all carry risk of movement. Materials used in solar construction—long members, plates, boxed items, and cable drums—come in various shapes and are susceptible to wind and slope. Poor temporary storage can lead to collapse or rolling out.

A commonly overlooked aspect of temporary works planning is the safety of access and transfer operations. Climbing on and off truck beds, transferring onto temporary equipment, and moving in areas with many level changes can result in falls if adequate handholds or treads are lacking. Sites tend to focus on the work itself, but many accidents occur in the actions before or after the task. In other words, safety must cover not only the work position but also getting to and from it.

In addition, merely having rules for protective equipment is meaningless if the conditions of use do not match the site. Distribution of protective gear is not the end; workers must understand when it is required, how to use it, and under what condition it should be replaced or corrected. Wearing gear superficially will not prevent accidents if scaffolding is inadequate or procedures are sloppy.

Measures against falls, trips, and falling objects can be hard to assess by appearance. A site may look orderly yet have impossible traffic lines, unbalanced temporary storage, or insufficient evacuation spaces. Therefore, inspect hazards along actual worker movements and ensure temporary works function as safety equipment.

Check 4: Is electrical work management thorough enough to prevent electric shock, short circuits, and fires?

If electrical hazards are not adequately understood during solar power plant construction, work can lead to serious accidents. In particular, solar modules generate power when exposed to light, so they differ from typical de-energized equipment and can easily create unexpected live conditions. To strengthen disaster prevention measures, it is necessary to manage the risks of electric shock, short circuits, arcs, and fires concretely from the construction stage.

The first important point is for the whole site to correctly understand which circuits may be live at which times. Assuming a circuit is safe because wiring is not yet connected or because commissioning has not started is extremely dangerous. Risks vary across situations—handling the DC side, using temporary power, using measuring instruments, terminal processing, and work around junction boxes and equipment—so insulating, isolating, verifying, labeling, and restricting access should be combined on the premise that circuits may be energized.

Electrical accidents often arise from unclear work procedures. If it is not defined who issues work permits, at which stage voltage checks are performed, who is responsible for inspections before and after connections, and what verification method prevents misconnection, judgment will vary among sites. Such variation leads to electric shock and short circuits. Because electrical work and surrounding tasks may be in close proximity on solar sites, do not leave everything to electrical personnel—share the hazard boundaries with nearby workers.

A fire-prevention perspective is also indispensable. Poor connections, insufficient tightening, insulation damage, damaged cable sheathing, contact with temporary materials, and improper terminal treatment may not immediately cause an accident but can lead to later heating or anomalies. Small defects missed during construction can become major issues after handover. Therefore, disaster prevention measures must be considered together with quality control that prevents future accident seeds as well as immediate construction safety.

Outdoor sites also increase electrical hazards due to rain, moisture, mud, and dust. Wet gloves or boots, terminals contaminated with mud, and areas around temporary equipment just after rain are more dangerous than usual. Yet in attempts to recover schedule delays, work may be forced ahead and judgment can weaken. Electrical tasks require a system that can decide to stop or postpone work based on environmental conditions.

From the perspective of preventing misconnection, labeling and recordkeeping are important. On wide sites where multiple systems progress in parallel, relying on verbal communication or memory for wire identification and connection verification is dangerous. Do not leave temporary labels in place; update immediately when changes occur and include third-party verification—such confirmation mechanisms greatly reduce accident risk.

Electric shock and fire, once they occur, often cause severe damage and erode overall site trust. Therefore electrical work should not be left to specialists alone; the entire site must understand hazard boundaries and access conditions and avoid ambiguous judgment related to energization.

Check 5: Are the stop-work criteria for sudden weather changes, heat, and natural disasters clear?

Because solar power plant construction is primarily outdoor work, it is strongly affected by weather. Risks change significantly with weather: heat during sunny weather, reduced visibility on cloudy days, slips and electric shock when it rains, flying materials and overturning in strong winds, and slope collapse or route inundation in heavy rain. To strengthen disaster prevention measures, it is essential not only to alert people based on weather information but to decide in advance under which conditions work should stop and how far it is acceptable to proceed.

A common on-site problem is that stop-work judgments differ by person. If one supervisor judges a condition dangerous while another thinks some work can continue, confusion results. This hesitation can be fatal during tasks such as lifting in high winds, moving on slopes in rain, or outdoor electrical work when lightning is near. Therefore, stop-work criteria must be specified concretely by work type, not left to subjective feeling.

For example, handling long members, hoisting operations, slope-proximity tasks, heavy-equipment entry, and energized work each present different weather-related hazards. Even the same rain brings very different risks depending on location, task, equipment used, and evacuation time. When setting stop-work criteria, consider not only weather but also place, work content, the tools and equipment used, and the time required to evacuate.

Heat countermeasures in summer have become particularly important. Solar construction often takes place on open land with little shade, exposing workers to direct sunlight and reflected heat. Material handling and installation involve repetitive lifting, stooping, and movement, causing heavy physical exertion. Heatstroke can progress without the individual realizing it, and management that relies on personal endurance cannot prevent it.

Therefore, heat-countermeasure operations matter more than mere warnings. Incorporate rest timing, water and salt intake, provision of shade and rest areas, adjustment of work hours, health checks, and first-aid procedures into site routines. Fostering an atmosphere where workers can readily report poor condition is also important. A culture that treats endurance and pushing through as a virtue is a major weakness in disaster prevention.

For natural disasters like typhoons or localized heavy rain, prepare in advance as well as make day-of decisions. Consider measures to prevent material dispersal, secure temporary materials, check slopes and drainage paths, evacuate heavy machinery, plan for power outages, and define safety checks for recovery—distinguishing pre-event and post-event procedures. Disasters often expand not during the worst weather itself but because of mistakes in pre- and post-event judgments. Forced cleanup or restarting without proper checks invites accidents.

Sites that are strong in weather response treat work stoppage not as a loss but as a management decision to ensure safety. Conversely, sites prone to disasters tend to push to continue work and delay stop-work judgments. Since you cannot change natural conditions in solar construction, clarify stop-work criteria so operations can be executed without hesitation.

Check 6: Do the communication system, education, records, and corrective-action mechanisms function?

Creating rules alone does not make disaster prevention measures stick. Sites that actually reduce accidents have systems that enable early reporting of abnormalities, reflect training content on site, correct pointed-out issues, and use the results in subsequent work. In other words, whether the cycle of communication, education, records, and corrective action is functioning becomes the real measure of safety management competence.

First, in communication systems, it is important that a person who finds an abnormality can report it immediately. If someone finds a hazard but does not know whom to tell, or reports and gets no prompt response, or feels uncomfortable speaking up, near-misses get buried. Because solar sites are large and responsibilities are often divided by area, it is necessary to clarify the primary reporting contact and the final decision-maker.

Education is also insufficient when delivered only once as general safety training. Repeated training is required—new-entry orientation, instruction when work changes, sharing disaster case studies, and explanations of site-specific risks—to fill understanding gaps. When subcontractors come and go, relying on verbal handovers is ineffective; explaining while viewing site conditions is more effective. Even if something is clear on drawings, actual slope gradients, narrow routes, and hazardous material delivery paths are hard to convey without being on site.

Recordkeeping also plays an important role. Retaining safety inspection results, corrective histories, near-miss reports, stop-work decisions, and training records reveals site weaknesses. Records should be used not merely for submission but to detect trends. For example, repeated near-misses from trips in the same area may indicate route design issues; repeated protective-equipment deficiencies in the same subcontractor may indicate the need to revise training. Numbers and records show safety biases invisible to intuition.

Most importantly, link findings to corrective action. Finding deficiencies in an inspection and ending with a verbal warning will not prevent recurrence. Analyze why it happened, where the system suffered strain, and whether lessons can be applied across similar tasks. Strengthening disaster prevention measures means not treating mistakes as individual failings but reshaping the site to make recurrence unlikely.

At sites with weak safety management, post-incident response tends to be person-dependent: it works if a particular individual is capable, but collapses when that person leaves. This is not sustainable disaster prevention. Standardize judgment criteria, reporting routes, and corrective methods so anyone can achieve the same level of checking.

Common weaknesses of sites where disasters are likely to occur

When observing solar power plant construction sites, those with many accidents or near-misses share some common tendencies. One is placing safety at the back of priorities. Sites that simplify safety checks to keep on schedule, minimize temporary works, and proceed despite sensing danger accumulate disaster risk. Safety and schedule are not opposites; if safety collapses, the schedule will ultimately fail too.

Another weakness is that management does not keep pace with changing site conditions. Hazards change after site formation, after racking assembly, after module delivery, and after wiring begins. If management methods remain as they were at the start of construction, required hazard checks will be missed. Disasters are more likely when management becomes fixed despite site changes.

Sites that rely too much on worker experience are also risky. Assuming that many veterans mean safety can work in the short term, but it prevents the verbalization and standardization of hazards and leads to person-dependent operations. Experienced workers can avoid danger unconsciously; newcomers or workers from other companies cannot. Creating an environment where anyone can work safely is the essence of disaster prevention.

An atmosphere where pointing out issues is difficult is another major problem. If workers feel they cannot speak up about dangerous footing, narrow routes, nearby heavy machinery, or poor working conditions, hazards are left unresolved. Safety culture is not about imposing strict rules; it is about creating an environment where people can voice hazards easily. It is important for site agents and managers to demonstrate a positive attitude toward hazard reporting and stop-work decisions.

How to implement operations that make disaster prevention measures stick

To elevate disaster prevention measures, one-off campaigns like a safety month are not enough. Safety checks must be naturally integrated into daily construction management. Specifically, creating a flow where safety information circulates—morning briefings, pre-start checks, midday reviews, end-of-day reflections, and weekly progress meetings—is effective.

In morning briefings, confirm that day’s hazardous tasks, weather, heavy-equipment layout, material deliveries, and intersecting work, and decide who will check what. Before starting work, verify actual site conditions match assumptions and revise procedures if necessary. At midday, reassess whether weather changes or schedule deviations have created new hazards. At the end of the day, record near-misses and improvement points and link them to next-day checks. In weekly meetings, aggregate these items and analyze site-wide safety trends.

Where this flow exists, safety management is not just on paper but embedded in construction decision-making. Conversely, sites with many checklists and records yet no accident reduction often fail to use safety information for subsequent decisions. The volume of records is less important than how they are used. Only when hazard records influence schedule adjustments and task changes do disaster prevention measures function.

Visualizing site information also helps make safety measures stick. Make hazard-area locations, traffic rules, restricted zones, weather-response levels, and items under correction visible and easily grasped so personal dependence decreases. On wide solar sites, information mismatches easily cause accidents, so share information visually.

Conclusion

Strengthening disaster prevention measures in solar power plant construction requires confirmation and operations tailored to site conditions, not mere warnings. Especially important are pre-work hazard prediction and role assignment, the safety of terrain, ground, and traffic lines, temporary works planning to prevent falls and trips, strict management of electrical work, clear stop-work criteria for sudden weather changes and heat, and a functioning cycle of communication, education, records, and corrective action.

Addressing these six items transforms a site that merely reacts after accidents into one that can nip accident seeds in the bud. Because solar projects involve large sites with diverse parallel processes, the visibility of hazards and the quality of information sharing determine safety. Do not let safety management remain a formality—translate it into actual actions and judgments to reduce disasters and protect quality and schedule.

To make disaster prevention measures stick on site, it is also important to accurately identify and quickly share hazardous spots, work areas, material placements, routes, and heavy-equipment traffic lines among stakeholders. If you want to handle site location information and inspection targets more reliably, consider using high-precision GNSS positioning devices for iPhone attachment such as LRTK. These can record precisely where safety checks are needed and make it easier for stakeholders to share a common understanding, making them a compelling option when considering ways to improve the accuracy of disaster prevention measures in solar power plant construction.