Renewable energy systems aren't just a sustainability checkbox. For the ARE, you need to evaluate photovoltaic arrays, solar thermal collectors, and geothermal heat pumps as legitimate MEP systems that affect building form, structural loads, electrical distribution, and project budgets.

The architect's role here isn't to engineer these systems. It's to select the right technology for a given building type, climate, and program, then coordinate that choice with the rest of the design. A rooftop PV array changes your roof structure, your electrical room sizing, your fire access pathways. A geothermal system changes your site work, your mechanical room layout, your first-cost-versus-operating-cost equation.

NCARB expects you to evaluate these systems based on function, cost, size, availability, programmatic needs, and energy use. That means comparing technologies, weighing trade-offs, and making defensible selections. Not memorizing panel wattages.

For PPD specifically, renewable energy selection sits at the intersection of building systems and project delivery. Exam questions ask you to match a technology to a building type, climate zone, program constraint, or budget scenario, and explain why. The evaluation framework matters more than technical specifications.

This topic covers the three major renewable technologies architects encounter most, how each one integrates into building design, and the evaluation framework you need for the exam.