6 Things to Watch Out for with Cheap Solar Power Plant Properties

Table of Contents

• Why cheaper solar power plant properties require more scrutiny

• Point 1: Confirm that the low price is not due to decreased power generation performance

• Point 2: Check for unfavorable feed-in conditions or disadvantages in the remaining contract term

• Point 3: Verify that equipment degradation or unaddressed repairs are not being concealed

• Point 4: Ensure there are no issues with land rights, boundaries, or road access

• Point 5: Confirm maintenance costs and future expenses have not been underestimated

• Point 6: Do not overlook on-site risks and discrepancies between the site and the documentation

• Perspectives practitioners should have when comparing low-priced properties

• Summary: Verify the reason for the low price on site before making a decision

Why You Need to Check Cheaper Solar Power Plant Properties More Carefully

When considering purchasing or acquiring a solar power plant, properties with low prices can appear attractive. Even in internal approval processes and investment decisions, properties that lower the initial outlay are more likely to be considered and can seem advantageous compared with other projects. However, if you decide without confirming why a solar power plant is inexpensive, you may encounter unexpected management burdens and repair needs after acquisition, which can ultimately make it an unfavorable deal.

Solar power plants are not merely facilities. They are business assets that integrate generation equipment, land, power sales terms, generation performance records, management structure, contractual relationships, and the surrounding environment. Therefore, you should not judge them only by low price; you need to break down and verify why they are cheap. If the reasons for the low price are clear and can be incorporated into an operational plan, the asset is worth considering. On the other hand, properties for which the low price cannot be explained, documentation is insufficient, or there are many unknowns on site should be approached with caution.

With used solar power plants, because they are already operational you can check past generation performance and inspection history. This is a major factor in making a decision. However, if there are circumstances such as unstable generation, frequent equipment stoppages, insufficient inspection records, unknown repair history, or concerns about the land contract, those may be reflected in the price. The cheaper the property, the more important it is to verify each of these background factors individually.

Also, because solar power plants are operated outdoors for long periods, they are strongly affected by local environmental conditions. Shadows from the growth of nearby trees, overgrown weeds, poor drainage, sediment inflow, deterioration of racking and foundations, cable damage, fence damage, and the like can be difficult to detect from documents alone. If on-site inspections are omitted, the "reason it was cheap" may only become apparent after acquisition.

Those responsible for operations should not simply avoid inexpensive properties. Rather, they should accurately identify why a property is cheap and determine whether that reason is acceptable or can be addressed through additional costs or management arrangements. This article organizes six perspectives to consider when evaluating inexpensive solar power plants. It focuses not on specific price amounts but on the risks behind the price and the methods for verifying them.

Note 1: Make sure the low price isn't due to a decline in power generation performance

For low-priced solar power plants, the first thing you should check is the actual power generation record. The value of a plant depends not on the installed capacity itself but largely on how stably it actually generates electricity. Even if the installed capacity appears large, a decline in generation performance may be the reason the price is set low.

When checking power generation performance, it is important not to judge solely by the annual total. Even if there appears to be no major problem over the year, a month-by-month view can show that output drops significantly during specific periods. Weeds may grow in summer and cast shadows on the panels; surrounding trees or terrain may cast longer shadows in winter; the system may be affected by snow or fallen leaves; equipment shutdowns may occur after heavy rain; and decreases in power generation can sometimes be caused by site-specific factors.

Check multi-year trends as well. Even if a single year’s generation performance looks good, you cannot tell whether that is due to temporary weather conditions or to consistently good management. If generation is gradually declining over multiple years, you should suspect equipment degradation, soiling, increased shading, inadequate vegetation management, or equipment malfunction. If generation suddenly drops from a particular period, a failure or environmental change may have occurred.

The difference between actual power generation and the projections made at the planning stage is also important. If sufficient generation was expected in the plan but actual output continues to fall short, you must identify the reasons. It is necessary to distinguish whether the shortfall can be explained by year-to-year variation in solar irradiance, whether the equipment’s design conditions were unrealistic, whether local shading or soiling is the cause, or whether output curtailment or shutdown history is having an impact.

In lower-priced properties, reduced power generation may be factored into the price. In such cases, whether the cause of the reduction can be remedied is the deciding factor. For example, if the reduction is caused by insufficient vegetation management or faults in some equipment, and appropriate measures are likely to restore generation, it may be worth considering. On the other hand, if the reduction is structural due to shading from the surrounding environment or land conditions, it may not be easily improved.

The purpose of checking power generation performance is not simply to see whether it is good or bad. It is to determine whether the reason it is cheap lies in the amount of power generated, what the cause is, whether it can be improved, and how much burden improving it would entail. The cheaper the property, the more carefully you need to examine the causes behind its generation performance.

Note 2: Check that there are no unfavorable factors in the electricity sale conditions and the remaining period

There are cases where the reason a solar power plant’s price is low is related to the conditions for selling electricity and the remaining period. The profitability of a power plant varies not only with the amount of electricity generated but also with the conditions under which the generated electricity can be sold. Also, for used power plants, since a certain period has already passed since the start of operation, you cannot judge the appropriateness of the price without confirming the remaining operational period.

When checking the terms for power sales, organize the contract details, the commencement date of operation, certification-related documents, procedures with the utility company, and the conditions regarding name changes or succession. Even if the paperwork appears to be fine, if there are inconsistencies in equipment information, location, owner, or contract name, additional verification may be required after acquisition. For lower-priced properties, such procedural uncertainties may be reflected in the price.

The remaining term is also important. Properties with a short remaining term may be priced lower because future income opportunities are limited. A short remaining term is not inherently bad, but you need to confirm whether it can generate electricity stably during that period and absorb the burden of maintenance and repairs. In particular, if major equipment replacement or large-scale repairs are imminent, you should carefully evaluate the balance with the remaining term.

On the other hand, properties that are cheap despite having a long remaining period may conceal other risks. Check whether there are circumstances such as unstable generation performance, progressing equipment deterioration, uncertainties in the land contract, heavy management fees, or restrictions on output control or grid interconnection conditions. Do not be reassured by the remaining period alone; you must confirm that the conditions to actually operate the asset for that period are in place.

Even if a property appears to have favorable terms for selling electricity, those terms cannot be utilized if it cannot generate power. Conversely, a property that looks unremarkable based only on the power-selling terms may still be operated reliably if its generation record is stable and the equipment and land are in good condition. To determine why the price is low, you need to check the power-selling terms, the remaining term, the generation performance, and the condition of the equipment together.

In practice, the more abstract the explanations regarding terms of electricity sales are, the more cautious you must be. Rather than judging solely by words like "the terms are fine" or "the procedures are feasible," verify the supporting documents, past performance, and the procedures required for transfer. For lower-priced solar power plant properties, it is important to identify early where the unfavorable elements lie in the electricity sales terms and the remaining period.

Point 3: Verify that equipment deterioration or unaddressed repairs are not being concealed

What you need to watch out for with low-priced solar power plant properties is equipment deterioration and unaddressed repairs. A power plant is equipment that operates outdoors for long periods, and various parts—panels, mounting racks, foundations, wiring, junction boxes, conversion equipment, monitoring devices, fences, drainage facilities, and so on—gradually deteriorate. For cheaper properties, such deterioration and the burden of repairs may be anticipated.

During equipment inspections, it is important not to focus solely on the solar panels. Check not only for cracks, dirt, and discoloration on the panel surfaces, but also for loosened fasteners, corrosion of the mounting structures, subsidence or scouring around the foundations, damage to cable sheathing, deterioration of connection points, ventilation conditions around equipment, and damage to fences and gates. Even if things look well maintained from a distance, there may be problems hidden by vegetation or on the backs of equipment.

Inspection reports and repair histories are also important. Check what kinds of defects occurred in the past and when and how they were addressed. The occurrence of a failure itself is not necessarily a problem. Rather, if abnormalities were detected, causes identified, appropriate repairs carried out, and measures to prevent recurrence documented, it becomes easier to assess the maintenance condition. The problem is when reported issues remain unaddressed or the repair details are vague.

For inexpensive properties, required repairs may have been postponed because past management was insufficient. If there are few inspection reports, the locations of photos are unknown, the status of improvements for noted issues is unclear, or failure histories are not organized, these should be checked thoroughly during on-site investigations. A lack of documentation does not mean there are no problems; it may simply mean they were not recorded.

Anticipate the timing of future repairs. Even if it is currently generating power, major components, monitoring systems, wiring, racking, fencing, and drainage systems may require repair or replacement during the operational period. If significant work is required immediately after acquisition, the advantage of a low purchase price is diminished. It is important to judge not only the purchase price but also the repairs that may be necessary after acquisition.

Equipment deterioration affects not only power generation but also safety. Damage to cables and poor connections can cause shutdowns or overheating. Degradation of mounting structures and foundations can increase risks during strong winds and heavy rain. Damaged fences can lead to unauthorized third‑party entry or animal intrusion. With cheaper properties, you should not be swayed by their low‑cost appearance; calmly check the condition of the equipment and the potential repair burden.

Note 4: Check whether there are any issues with land rights, boundaries, or road access

When a solar power plant is offered at a low price, it is important to check whether there are any hidden problems related to the land. Attention tends to focus on the condition of the generation equipment and the terms for selling electricity, but a solar power plant is a business that depends on the land. If you cannot continue to use the land stably, no matter how well the facilities are equipped, there will be concerns about long-term operation.

First, what you should check is the land use rights. Confirm whether the land is owned or leased, and what the terms of any surface rights or leasehold rights are. If the land is leased, you need to check the contract period, renewal conditions, the possibility of early termination, rent adjustments, restoration obligations, and the relationship with the landowner. If the land use rights are insufficient relative to the power sales period or the planned operation period, that may be a reason the price is set low.

Boundary checks are also indispensable. Confirm that fences, panels, mounting racks, drainage channels, maintenance access paths, and cable routes are all contained within the site. Even if the drawings appear to be fine, on-site there can be issues such as boundary markers not being found, the boundary with neighboring land being unclear, fences being too close to the boundary, or drainage facilities involving adjacent properties. If a site is acquired while the boundary is unclear, adjustments with neighbors or additional verifications may be required later.

Road access conditions are also very important in practical terms. It is not sufficient for people to be able to enter only for routine inspections; you need to verify whether tasks such as grass cutting, cleaning, equipment replacement, and disaster recovery can be carried out. Conditions such as narrow access routes, difficulty for service vehicles to enter, unclear right-of-way, muddiness in rainy weather, and difficulty bringing items in from surrounding roads directly translate into increased management burdens after acquisition.

Topography and drainage conditions of the land also affect the price. On sloped or developed/graded land, it is important to watch for soil runoff, slope failure, concentration of rainwater, and clogging of drainage channels. On land near forests, fallen trees, leaf litter, wildlife damage, and overgrowth of weeds can become problems. Even land that appears flat may have areas that tend to collect water after rain, which can affect foundations, cables, and maintenance access routes.

Land-related issues may not be easy to resolve after acquisition. Some parts of the property’s systems can be replaced or repaired, but property boundaries, road access, drainage, and agreements with land rights holders require time and coordination. Therefore, the cheaper the property, the more important it is not to postpone checking the land conditions and to verify them at an early stage.

If land rights, boundaries, and road access are clear, even inexpensive properties are easier to consider. Conversely, if there are many uncertainties about the land, you need to carefully evaluate the practical risks even if the apparent price is attractive.

Note 5: Check that maintenance and future costs have not been underestimated

For solar power plants offered at low prices, you need to verify whether post-acquisition maintenance costs and future expenses have been adequately anticipated. Even if the purchase price is low, if substantial costs and effort arise during operation, the project can become a significant burden in practice. When evaluating a low price, it is important to factor in the management and repairs that will be required after acquisition.

Maintenance and management include regular inspections, power generation monitoring, mowing, cleaning, inspection of electrical equipment, emergency response, cleaning of drainage channels, repair of fences and gates, and management of surrounding trees. The burden of these tasks varies greatly depending on the plant’s location and the condition of its equipment. Even with the same facility scale, the ease of management differs between a plant on flat, easily accessible land and one located in forested or sloped terrain.

When reviewing past maintenance costs, don't take low costs alone as a positive sign. There may be cases where costs were low simply because necessary maintenance was not adequately performed. If mowing is infrequent and affects power generation, inspections are merely formal and overlook deterioration, or drainage channels are not cleaned, costs can rise as soon as proper maintenance begins after acquisition.

Future costs must also be confirmed. Replacement of major equipment, cable repairs, repairs to mounting racks and foundations, fence renewal, drainage measures, updates to monitoring equipment, and reassessment of the communications environment may occur during the operational period. Even if the system is currently generating power without problems, substantial remediation may be required after acquisition. For lower-priced properties, such future liabilities may already be reflected in the price.

Carefully review the management contract. Check to what extent the scope of inspections, emergency response, mowing, cleaning, monitoring, report submission, and the communication protocol for abnormalities are included. Even if the contract appears to provide management, there may be insufficient detailed on-site checks. It is important not only whether reports are produced, but whether they actually contain content that leads to improvements.

Properties where maintenance and future expenses are underestimated tend to appear to have better yields and cash flow. However, if those figures are not realistic, discrepancies with your plan will arise after acquisition. When considering a low-priced property, you should judge it not by how cheap it is at purchase but by the total burden over the entire holding period.

Operational personnel should check for any unforeseen costs and, if necessary, review the assumptions regarding maintenance, repairs, and on-site response. To safely consider lower-priced properties, it is essential to identify future liabilities not included in the price as early as possible.

Note 6: Do not overlook discrepancies between on-site risks and documentation

What you should be most careful about with low-priced solar power plant properties is discrepancies between the documents and the site. Even if the project summary, drawings, photos, inspection reports, and generation performance appear to be in order, the reality can be different when you inspect the site. For used properties, repairs or changes made during operation, lack of maintenance, and changes in the natural environment can cause the condition to differ from what it was when the documents were prepared.

In an on-site survey, we first verify whether the drawings match the actual layout. We inspect the panel layout, mounting structures, power conversion equipment, junction boxes, fences, gates, maintenance accessways, drainage channels, and conditions near the boundaries. If the drawings have not been updated and remain old, the site conditions may not match the documentation. If the drawings differ from the site, it is necessary to confirm when and why the changes were made and whether the related documents have been updated.

Shadow risks should also be checked on site. Observe whether nearby trees, buildings, utility poles, or changes in terrain elevation are casting shadows on the panels. Because shadows change with the time of day and season, even if they are not visible during the site inspection, it is important to cross-check with periods of reduced power generation. If generation is lower only in a specific season, the solar altitude or the impact of surrounding trees may be involved.

We also check risks related to drainage and sediment. We check whether drainage channels are clogged, whether sediment has accumulated, where rainwater flows, and whether there are places prone to water pooling. Poor drainage can lead to scour around foundations, deterioration of maintenance walkways, and impacts on cables and electrical equipment. In particular, on slopes and filled or graded land, inspections should be carried out with the expected post-rain conditions in mind.

Minor deterioration of equipment can also be discovered on site. Worn cables, corrosion of mounting structures, settlement around foundations, damaged fences, and damage concealed by vegetation can be difficult to discern from photos. In cheaper properties, such on-site risks may be presented without being fully identified or assessed.

Risks found on site should be recorded not only with photographs but in a way that shows their locations. If you can organize which drains are prone to clogging, which trees are causing shade, which areas near boundaries have items to be checked, and which pieces of equipment need repairs together with location information, it will be easier to share understanding among stakeholders.

If you overlook discrepancies between the documents and the actual site, unexpected measures may be required after acquisition. The cheaper a property is, the more important it is to confirm on site whether there are any risks not written in the documents and to clarify which risks are responsible for the low price.

Perspectives that practitioners should have when comparing inexpensive properties

When comparing inexpensive solar power plant properties, you should not simply sort them by price; instead, you need to classify the reasons they are cheap. By distinguishing whether the low price is due to a short remaining term, a decline in generation performance, equipment deterioration, land conditions, or management burden, it becomes easier to determine which properties to consider and which to avoid.

First, confirm whether the property’s low price can be explained. If the seller’s or broker’s explanations are vague and not supported by documentation or performance records, exercise caution. Phrases like "the conditions are good," "there are few problems," or "it has been managed" alone are insufficient as a basis for practical judgment. Verify power generation records, inspection history, repair history, land contracts, drawings, and on-site photos, and check that the explanations match the documentation.

Next, we assess whether the reasons for the low price can be addressed. Issues such as inadequate vegetation management, minor equipment repairs, or poor document organization can in some cases be improved through appropriate measures. By contrast, problems like unclear boundaries, inadequate road access, poor drainage, heavy shading, uncertain agreements with landowners, and restrictions on land-use conditions may not be easily resolved. It is important to distinguish between remediable risks and structural risks.

We will also confirm whether the risks can be handled by the post-acquisition operating structure. If your internal team or an outsourced partner can provide adequate on-site management, you may be able to consider it by factoring in a certain level of management burden. However, if the site is remote and emergency response is difficult, coordination with the management company is weak, or there are no means to ascertain local conditions, even small problems can lead to major losses.

When comparing inexpensive properties, prioritize not only power generation track record but also the ease of land management. Even if the generation looks temporarily good, a property that requires time-consuming mowing, drainage management, boundary verification, or repair work will increase long-term burdens. Conversely, even if the price is low, a property is worth considering if its generation record is stable, the land and equipment risks are clear, and the necessary measures can be anticipated.

In internal communications, you should not emphasize that something is cheap; rather, you must demonstrate that the reasons for the low price have been verified. By clarifying which items carry risk and which do not, what costs are being anticipated, and which local risks have been checked, you increase the transparency of the decision.

Cheap properties can be an option if their risks are understood. However, if you choose without assessing the risks, unexpected problems will accumulate after acquisition. It is important for those responsible for operations not merely to view low price as an attraction, but to adopt an attitude of verifying the reasons for the low price.

Summary: Check the reason it's cheap on-site before making a decision

When considering a low-priced solar power plant, it is important not to judge it by price alone. You should comprehensively check the power generation record, terms for selling electricity, remaining contract period, equipment degradation, land rights, boundaries, road access, operation and maintenance costs, future expenses, and on-site risks, and clarify why it is cheap.

Low-priced properties do not necessarily have major problems. If the remaining term and conditions are clear, the power generation track record is stable, and foreseeable repair and management burdens can be built into the assessment, such properties may be considered in practice. On the other hand, properties for which the reason for the low price cannot be explained, documentation is lacking, the cause of reduced generation is unknown, there are concerns about the land or boundaries, or on-site management is difficult should be judged with caution.

For used solar power plants, past operational history and current on-site conditions greatly affect their value. Even if generation performance looks good on paper, shading, vegetation, drainage issues, or equipment deterioration may be found on site. Even when there is an inspection report, additional verification is necessary if the photo locations are unclear, the noted issues have not been addressed, or the repair history is ambiguous.

What matters for practitioners is not avoiding cheap properties, but being able to explain why they are cheap. In internal approval processes and when comparing cases, it is necessary to organize not only the price but also which risks were checked, which costs were anticipated, and which on-site conditions were understood. If the reason for the low price is clear and a response policy can be established, the property becomes easier to treat as material for decision-making.

During on-site inspections, it is effective not only to take photos and notes but also to record inspection points together with precise location information. If you can record, with location information, equipment near property boundaries, drainage channels, trees that cause shading, the extent of vegetation overgrowth, cable damage, fence damage, and spots that require repairs, it becomes easier to share identical information among stakeholders. The cheaper the property, the more important it is to clearly identify where the risks are on the site.

If you want to carry out on-site surveys and management records for solar power plants more accurately, using LRTK (iPhone-mounted GNSS high-precision positioning device) can also be effective. If you can record inspection points within the plant together with highly accurate location information, it becomes easier to organize discrepancies between drawings and the site, points of caution near boundaries, risks related to drainage and shading, and locations of equipment deterioration. When considering low-priced solar power plant properties, making judgments not only based on desk-top conditions but by accumulating evidence that can be confirmed on site is an important step to prevent failures.