Is a Total Station Necessary for Solar Power Plant Surveying? 5 Comparisons

Table of Contents

• Why the necessity of a total station in solar power plant surveying is often unclear

• Comparison 1: The necessity of a total station judged by accuracy and reproducibility

• Comparison 2: The necessity of a total station judged by terrain and line-of-sight conditions

• Comparison 3: The necessity of a total station judged by work stages

• Comparison 4: The necessity of a total station judged by work organization and efficiency

• Comparison 5: The necessity of a total station judged by preventing rework and recordability

• Sites where a total station is necessary for solar power plant surveying and sites where it is not

• Summary

Why the necessity of a total station in solar power plant surveying is often unclear

In solar power plant surveying, questions often arise about whether a total station is truly necessary. This stems from the fact that solar power plant sites differ somewhat from the fine-scale building surveys in residential areas: they cover wide sites, and the required accuracy and work content can vary greatly depending on location. Because the types of surveys needed can differ even within the same site—such as pre-development site assessment, terrain checks for design, staking out pile or foundation positions, checking frame alignment, and elevation control related to drainage planning—it is difficult to judge simply by “necessary” or “unnecessary.”

Moreover, some solar sites are on open slopes or cleared development land with good visibility, while others have trees, slopes, debris, temporary materials, or heavy equipment movements that block sight lines. Due to these differing conditions, a total station may be very effective for one task but another method may be more agile for a different task. Site personnel need to decide based not on the type of instrument alone but on which stage, at what accuracy, over what area, and with how many people the work will be carried out.

In other words, the necessity of a total station for solar power plant surveying is not always uniform. What matters is not whether you own a total station, but what you want to control reliably. Whether you prioritize alignment, elevation consistency, speed over a large area, or reproducibility through construction stages will change the optimal approach. This article organizes situations where a total station is necessary and situations where it does not need to be the central instrument, using five comparison axes that commonly serve as decision criteria in practical solar power plant surveying.

Comparison 1: The necessity of a total station judged by accuracy and reproducibility

The first comparison axis is accuracy and reproducibility. For solar power plant surveying, a rough positional check may suffice if the goal is merely to understand the general layout of a large site. However, for foundation or pile center locations, the arrangement of access ways and drainage facilities, and checking equipment layout consistency, it is important that repeated measurements of the same point yield stable results. Because a total station observes points by combining angles and distances, it excels in situations where you want to carefully control local alignment and positioning.

Solar power plants, in particular, often have racking aligned in rows, so a small error in one reference can cascade into subsequent equipment placement. Even a slight deviation of a single alignment can become conspicuous at the end of a row; such inconsistencies can be hard to detect during construction but may become apparent at completion. In these cases, a total station—which allows you to follow positions carefully while being conscious of direction and distance from reference points—serves not merely as a point-measuring tool but as equipment for maintaining alignment.

Reproducibility is also important. Construction does not finish in a single day; it progresses through stages such as site preparation, foundations, racking, wiring, and ancillary works. When you need to re-check a position later or another crew takes over, it is crucial that anyone can reproduce the same reference. Total stations have relatively clear concepts of reference point management and observation procedures, so if procedures are established, it is easier to verify consistency during re-surveys.

On the other hand, not every task requires this level of reproducibility. For example, early site reconnaissance, broad terrain understanding, or pre-construction conceptual review may prioritize quickly grasping the overall picture. Therefore, when evaluating whether a total station is necessary for solar power plant surveying, it is important to judge not only the intrinsic accuracy but also whether you can reliably re-locate the same positions afterward. The more you need precise positioning and continuous control, the stronger the case for using a total station.

Comparison 2: The necessity of a total station judged by terrain and line-of-sight conditions

The second comparison axis is terrain and line-of-sight conditions. Solar power plants are planned in very diverse environments: flat land, gentle slopes, developed land with many level changes, terrain that spans valleys, and sites with remaining scrub or slopes. Because a total station requires line of sight between the instrument and target points, it performs well where visibility is good but may require additional steps where sight lines are obstructed.

For example, when a site has been developed and tidied so that long sight lines are visible, a total station becomes very easy to use. It is straightforward to manage row direction, check straightness, and verify alignment of multiple points, which directly stabilizes work quality. Especially on sites where structures are repeatedly spaced at regular intervals, merely having sight lines greatly increases observation efficiency and leads to fewer re-measurements.

However, actual solar sites are not always in such ideal conditions. On undeveloped areas, sections before clearing, areas without temporary roads, or zones with scattered debris, it can be difficult to secure line of sight to target points, which can increase the number of instrument relocations. Additionally, in places where observations involve looking up or down steep slopes, measurements may be possible but the workflow can be easily interrupted. In these cases, it is not that the total station’s capability is low; rather, site conditions make it difficult to exploit its strengths.

At the same time, sites with significant elevation differences or obstructions often require careful checking of the relationship between elevation and position. Thus, poor sight lines do not automatically mean a total station is unnecessary. In fact, with measures to secure sight lines, careful placement of instrument points, and organized observation procedures, complex terrain can make confirmations by total station all the more reassuring. The key is not to assume “unnecessary because the site is wide” or “unsuitable because it’s mountainous,” but to divide work into units where line of sight can be maintained and clearly define what ranges will be controlled by which references.

Comparison 3: The necessity of a total station judged by work stages

The third comparison axis is the work stages. Surveying for a solar power plant does not retain the same content from initial planning through construction completion. In the site-assessment stage, the focus is on understanding the terrain, boundaries, existing structures, access routes, and drainage flow across the site. At this stage, collecting a lot of information quickly is important, and a total station may not need to be central. The priority is to gather materials required for design decisions.

However, as construction becomes concrete, the need for a total station tends to increase. Typical examples include establishing and handing over reference points, staking out pile centers and foundation positions, checking alignments and offsets, and restoring positions of structures. These tasks require not just knowing where a point is, but confirming that it corresponds correctly to the design drawings. Especially on sites with multiple subcontractors or crews, building references that anyone can reproduce is indispensable. In that sense, a total station tends to become more important in the later stages of the work.

Total stations are also effective for as-built confirmation. If issues in embankments after grading, drainage slopes, component fit, row misalignment, or elevation variations are discovered after construction, corrective work can be burdensome. Using a total station to check whether things fit the design during intermediate construction stages is therefore highly valuable. In other words, while efficiency is emphasized in the planning stage, rigor in control becomes more important during construction, so the need for a total station generally increases as the work progresses.

From this comparison, it becomes clear that determining whether a total station is required for solar power plant surveying cannot be answered with one blanket response. A site where a total station is not essential during initial surveys may require it as soon as construction begins. Conversely, on relatively simple small sites, limited use of a total station may be sufficient. Therefore, when considering introducing equipment, it is important not only to look at site surveys but to anticipate which stages of the entire project will require how much accuracy in position and elevation.

Comparison 4: The necessity of a total station judged by work organization and efficiency

The fourth comparison axis is work organization and efficiency. When site managers consider the necessity of a total station, focusing only on precision can create a disconnect with practical operations. No matter how capable the instrument, it will be difficult to operate if it does not fit site staffing, workflows, relocation frequency, and coordination with construction crews. Solar power plant sites are large and measurement targets change day by day, so surveying does not operate in isolation; it must be coordinated with earthworks, foundation crews, racking crews, and electrical crews.

A total station is well suited to creating robust references and confirming each point carefully, but it requires steps such as setup, leveling, back-sighting, observation, and relocation. Therefore, while it supports meticulous management for some tasks, it can feel like extra work for wide-scattered targets or when you want a quick rough check of many points. On days when you want to walk an entire wide site at morning briefings, or when an urgent design change requires immediate checks at multiple locations, a more mobile approach may fit the site better.

However, evaluating efficiency solely by work speed is dangerous. Even if staking is completed quickly, if the construction crew later requests rework or another crew cannot pick up the positions, overall efficiency will drop. Although a total station requires certain procedures for observation, its high reliability in positioning can reduce confusion in subsequent stages and thus contribute to comprehensive efficiency. Particularly where you want to preserve alignment, right angles, offsets, and spacing, the carefulness of a total station will pay off later.

The compatibility with the work organization is also important. Whether there is a dedicated surveyor, whether the construction manager doubles as surveyor, or whether multiple crews share duties will change the appropriate operating method. If an experienced surveyor can manage references while overseeing the site, a total station becomes a very powerful tool. Conversely, on sites where a small team must cover a large area, it is more practical to combine methods rather than rely solely on a total station. Thus, from an efficiency perspective, a total station should be understood as equipment suited to operations that prioritize reliability rather than simply being slow or cumbersome.

Comparison 5: The necessity of a total station judged by preventing rework and recordability

The fifth comparison axis is preventing rework and recordability. On solar power plant sites, the critical issue is often not the surveying itself but how survey results are linked to site management. Construction mistakes frequently stem from communication and verification gaps after measurements are taken. For example, misunderstandings about foundation positions, shifts in alignment standards, loss of reference points due to temporary moves, and misreading of grades after development often result from accumulated small verification lapses.

A total station makes it easier to organize the relationship between the observation origin and the target points, and if procedures are established, it is easy to explain which reference produced which position. This is important not only for measuring but also for sharing on-site why a certain position was chosen. On wide sites like solar power plants, where multiple crews work separately and construction continues over many days, keeping measurement results in a traceable state is the foundation of quality control.

High recordability also aids in handling design changes and additional checks. It is common for construction to deviate from initial plans during the work—such as revising drainage design, adjusting equipment placement, or responding to delivery conditions. If it is unclear what was previously controlled and how, every recheck can halt site progress. Surveys performed with a total station tend to preserve the relationship between reference points and observed points, making it harder to undermine the foundation when responding to changes.

Of course, recordability is not the exclusive domain of total stations. Other positioning methods can also keep records if operated thoughtfully. Still, when considering fine position control and later reproducibility, total stations provide a high degree of practical reassurance. In solar power plant surveying, linking measurement outcomes to overall construction quality is more important than whether you measured a point in one go. If you aim to create a site with minimal rework, it is helpful to think of a total station’s necessity not just in terms of observational performance but as equipment that supports management procedures.

Sites where a total station is necessary for solar power plant surveying and sites where it is not

From the five comparisons above, a total station becomes necessary for solar power plant surveying when strict control of position and alignment is required. Specifically, total stations are especially valuable on sites where foundation or pile layouts are continuous and small deviations easily propagate to later stages, where you need to closely check post-development elevations and drainage directions, and where reproducibility is prioritized for handling design changes and as-built verification. The deciding factor is not simply whether the site is flat or mountainous but the strictness of control required and the need for re-surveying.

Conversely, there are sites where a total station does not need to be central. For example, during initial site reconnaissance or conceptual checks, it is more important to quickly grasp the broad area and gather information needed for planning decisions. At this stage, capturing terrain trends, obstacles, access, existing structure layouts, and construction constraints is more important than fine alignment control. Also, on small sites with relatively simple structures, using a total station selectively at key points may produce a better overall work balance.

What is important is not to think of using a total station as a binary choice. Solar power plant surveying requires both mobility across wide areas and rigorous position control at key points. Therefore, a realistic approach is to secure mobility for the overall site while using a total station at important locations for reference management, staking, as-built confirmation, and final alignment checks. The need is not for a single all-purpose instrument but for role allocation that fits site conditions and work stages.

As a practical matter, it is also important for practitioners not to end the procurement discussion at the machine’s specifications. Without considering who will operate it, at which stages it will be used, how references will be recorded, and how results will be shared with construction crews, even excellent equipment will not be fully effective. Whether a total station is necessary ties directly to the construction management philosophy—how rigorous you require site control to be. For that reason, instead of dismissing a wide site as unnecessary, it is better to adopt the idea that a wide site calls for precise control at key points.

Summary

The answer to whether a total station is necessary for solar power plant surveying is neither always yes nor always no. Considering the five comparisons—accuracy and reproducibility, terrain and line-of-sight conditions, work stages, work organization, and preventing rework and recordability—it becomes clear that total stations are particularly effective when strict position control is needed. While initial site assessment and broad checks can sometimes proceed with other methods, a total station still plays an important role when moving forward with construction while maintaining reference control.

In practice, the most important thing is to understand the strengths and limitations of each instrument and use them according to the overall workflow of the site. Situations that require quickly grasping a wide area and situations that require precise control at key points coexist within the same site. Therefore, clarifying what must be maintained at which stages and leveraging total stations where necessary will enable a balance of quality and efficiency.

In recent years, options that increase on-site mobility while facilitating high-accuracy positioning have expanded. For situations where you need to move across a wide site while checking positions, or where construction managers need to handle coordinates quickly on site, combining systems such as LRTK (iPhone-mounted GNSS high-precision positioning device) can make survey operations for solar power plants more flexible. If you want to maintain the key uses of a total station while improving overall site mobility, reviewing the surveying approach to include such measures is a practical first step toward improving operations.