Ebook

From layout to BOQ: How to protect CAPEX accuracy

OCTOBER; 29, 2026

How much can a small design change really cost your solar project?

Early bills of quantities (BOQs) are essential for estimating project costs, but they're often built on preliminary layouts, simplified cable routes, and assumptions that haven't been validated yet. When these estimates become the basis for budgets and commercial commitments, even routine design changes can lead to unexpected CAPEX variations.

Our free guide explores why early BOQs drift from actual project requirements and how to keep cost estimates accurate as designs evolve. Learn how to identify hidden cost risks, connect layout decisions to material quantities, and build a more reliable foundation for project budgeting.

What's inside?

  • Why early BOQ estimates change: The common disconnects between preliminary designs and detailed engineering.
  • How layout decisions affect CAPEX: Understanding the cost implications of moving substations, adjusting cable routes, and modifying site layouts.
  • Where hidden costs appear: Identifying risks in trenching, civil works, and grid-connection scope.
  • A practical cost example: See how a single substation relocation can impact a project's budget.
  • How to improve BOQ accuracy: Best practices for version control, quantity validation, and managing design assumptions.
  • A BOQ review checklist: Essential checks for engineering managers before approving commercial commitments.

Keep your project costs under control. Get the practical guidance you need to identify cost risks early and make more informed engineering and budgeting decisions.

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