Describe aligning engineering, permitting and commercial teams on a change.
Choose an example where a change, such as a new layout or equipment choice, affected design, permits and cost. Explain how you brought the three teams together and shared the facts, such as impact on timeline, approvals and money. Describe how you recorded the decision, with reasons and owners, so nobody was confused later. Finish with the impact, such as avoided delay or saved cost, and what you learned about early communication.
How would you estimate annual energy yield for a proposed solar installation?
Start with local solar data, such as sunlight received on the panels, taken from trusted sources and adjusted for tilt and direction. Apply system losses, such as heat, dirt, shading, wiring and inverter losses. Include yearly panel ageing. Consider limits like grid export caps or planned shutdowns. Combine these into a first year yield, then extend it across the project life. Finally, give a range, not a single number, by testing how sensitive the result is to key assumptions.
How do you compare a lower-cost component with a shorter warranty?
Look beyond the purchase price. Estimate the lifecycle cost, including expected failures, repair time, lost energy and replacement over the project life. Ask how likely the component is to fail, using test data and field history. Check the vendor's strength, such as its financial health, service network and record of honouring warranties. A short warranty from a weak vendor is riskier. Then compare total expected cost and risk, and consider negotiating better terms or spare parts.
A grid study reveals a constraint late in design. What options would you assess?
First, understand exactly what the constraint is, such as limited capacity at the connection point or a delay in upgrades. Then compare options. You could reduce the plant size, accept some limits on output at busy times, add battery storage to hold and release energy, or change the design or connection point. For each option, estimate the effect on cost, energy sold and schedule. Talk early with the grid operator and the commercial team, and choose the option with the best value and risk.