In early-stage renewable energy development, some of the most critical project decisions—interconnection and routing, equipment selection and material quantities—are made before full site data is available.
As timelines compress and procurement decisions move earlier in the project lifecycle, developers are increasingly required to lock in assumptions with limited information. The cost of getting those assumptions wrong isn’t just inefficiency—it’s rework, redesign and risk carried deep into engineering and construction.
That’s why early decisions matter—and why challenging those assumptions with real-world data can be a powerful lever for reducing risk before projects scale.
The Challenge: Making Decisions with Limited Data
Early development requires teams to move forward before all variables are fully understood.
At this stage, developers are weighing:
- Preliminary site conditions and geotechnical assumptions
- Interconnection and permitting requirements
- Early engineering inputs that inform downstream design
To keep projects moving, these inputs are often simplified or estimated early in the process.
The challenge is not whether those assumptions are necessary—but how well they represent real-world conditions, and what level of risk they introduce into future decisions.
Why Early Assumptions Matter More Than Ever
The role of early-stage project decisions has shifted.
Developers are increasingly expected to:
- Establish accurate quantities earlier in the design process
- Advance engineering to support interconnection and permitting requirements
- Make procurement-related decisions before designs are fully refined
Once these decisions are made, there is limited appetite for change.
As a result, uncertainty in early assumptions can lead to:
- Changes in material quantities later in design
- Misalignment between early-stage concepts and detailed engineering
- Increased pressure on project timelines as conditions evolve
In many cases, the goal is not perfection—it’s confidence. Developers need to move forward with decisions that are resilient as the project develops.
From Field Data to Better Assumptions
Ulteig’s approach to early-stage development is grounded in a simple principle:
validate what you can, as early as possible.
In recent engineering work presented at IEEE PVSC 54, Ulteig’s solar PV electrical team explored a common question in underground cable design: whether standard assumptions about soil conditions accurately reflect real-world project sites.
By comparing standard modeling approaches with data-informed methods using measured soil temperature and moisture conditions, Ulteig engineers were able to evaluate how conservative these assumptions are in practice.
The insight was not that standard methods are incorrect, but that they may already include built-in conservatism.
Understanding that margin creates an opportunity to:
- Better interpret early design assumptions
- Reduce uncertainty in engineering decisions
- Avoid layering additional conservatism without clear justification
This matters because cable sizing decisions can influence procurement planning and overall project economics. When assumptions are better calibrated to actual site conditions, teams may be able to avoid unnecessary increases in DC and AC cable sizes while maintaining design confidence and optimizing project costs.
Connecting Technical Insight to Development Decisions
For early-stage developers, the value of this type of analysis is practical.
It helps answer questions such as:
- How reliable are early inputs when detailed site data is not yet available?
- Where can desktop analysis provide meaningful direction before field validation?
- How should assumptions influence decisions around routing, cable selection or system layout?
In some cases, this type of work can also support a more informed use of preliminary data sources, helping teams move forward with greater confidence even when information is incomplete.
The Role of Geotechnical Understanding Early in Development
As noted by Ulteig’s early development teams, one of the biggest opportunities in early-stage work is improving how site conditions are understood upfront.
Decisions around:
- Whether to rely on desktop-level inputs
- When to invest in more detailed geotechnical data
- How to interpret variability across a site
can directly impact how assumptions carry into later design phases.
Bringing more clarity to these inputs earlier helps reduce the likelihood of revisiting key decisions after engineering has progressed.
What This Means for Developers
For developers and IPPs, improving assumption quality early can support:
- More stable design progression as projects move into detailed engineering
- Better alignment between early concepts and execution requirements
- Reduced pressure to adjust quantities or layouts later in the process
- More confident decision-making when timelines require forward progress
This is especially important in an environment where timelines, approvals and procurement decisions are increasingly compressed.
Conclusion
Early-stage development will always involve uncertainty. The goal is not to eliminate that uncertainty—but to better understand its impact on project risk.
By validating assumptions where possible and applying engineering insight to early decisions, developers can improve consistency as projects progress and reduce the likelihood of downstream surprises. Because in complex projects, the quality of early decisions often determines how smoothly everything that follows can unfold.
To learn how Ulteig supports developers in making more informed early-stage decisions, explore our Developer Services Suite and Solar capabilities, where engineering insight is applied from the earliest phases of project development.
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