AEE Business Energy Professional common mistakes
AEE Business Energy Professional · Understand the traps and how to avoid them.
Calculating project savings by multiplying kWh saved by one blended $/kWh derived from total bill divided by total kWh, then applying that result to lighting or motor upgrades.
It is quick and looks defensible, but utility bills bundle energy blocks, demand charges, ratchets, riders, power-factor penalties, and taxes that do not scale uniformly with kWh.
What to do instead
Rebuild the tariff component by component. Separate avoidable energy, demand, and fixed charges; apply block rates, ratchets, and penalties; then compute savings only for costs that actually change.
Choosing a project solely by simple payback and ignoring measure life, discount rate, energy escalation, financing costs, tax effects, and incremental O&M.
Simple payback is easy to calculate and commonly used in screening, so candidates stop there even when the exam asks for life-cycle or profitability analysis.
What to do instead
Compute NPV, IRR, and life-cycle cost using explicit assumptions. Use incremental cash flows, state the analysis period and discount rate, and include escalation, financing, taxes, and O&M.
Establishing an M&V baseline from post-installation consumption or using an unadjusted pre-installation year without weather, occupancy, or production normalization.
Baseline and reporting-period conditions differ, and candidates treat raw bills as comparable when key drivers have changed.
What to do instead
Define a baseline period, identify independent variables, document adjustments, and use an appropriate IPMVP option. Report uncertainty and avoid using post-installation data as baseline.
Reporting Scope 2 emissions with a single grid average and ignoring market-based instruments such as RECs, PPAs, or supplier-specific factors, or double-counting renewable claims.
Scope 2 has location-based and market-based methods, and candidates conflate them or apply renewable attributes without checking ownership and retirement.
What to do instead
State the accounting boundary and method. Report location-based and market-based Scope 2 separately, use documented emission factors, convert to CO2e, and ensure renewable instruments are retired and not double-counted.
Reading logger kW values without applying CT/PT ratios or meter multipliers, and assuming power factor equals 1.0 when converting kVA to kW.
Candidates trust the display or nameplate and overlook instrument transformers, phase configuration, and true-RMS measurement.
What to do instead
Verify CT/PT ratios, multiplier, phase, interval length, and logger settings. Cross-check against utility bills or a portable meter, and measure or obtain power factor rather than assuming unity.
Applying a prescriptive envelope or lighting table while missing mandatory code provisions such as economizers, controls, commissioning, or metering, or mixing editions of the code.
Candidates focus on the table values and forget that mandatory requirements apply regardless of the prescriptive path, and code editions change.
What to do instead
Identify the applicable code edition and local amendments first. Separate mandatory, prescriptive, and performance requirements, and verify that all mandatory provisions are included.
Comparing electricity or gas supply offers on the commodity $/kWh or $/therm alone, without adding capacity tags, transmission, ancillaries, shaping, balancing, and risk premiums.
Marketed commodity prices are visible and easy to compare, while delivered cost components are buried in tariffs and contract terms.
What to do instead
Build a total delivered-cost comparison using the actual load profile. Include all tariff components, shaping and balancing, contract terms, credit requirements, and risk allocation.
Sizing a CHP system to the peak electric load and assuming all recovered waste heat is useful, without checking thermal load duration or standby charges.
Peak loads are easy to find and CHP is often described by electric capacity, so candidates overlook thermal matching and part-load operation.
What to do instead
Use electric and thermal load-duration curves. Size for simultaneous useful loads, evaluate part-load performance, and include standby, backup, and interconnection costs.
Mixing site energy and source energy or converting kBtu, kWh, and therms inconsistently, leading to double-counted savings or an incorrect energy balance.
Different units and boundaries appear in bills, benchmarks, and reports, and candidates convert only some values or forget source-site factors.
What to do instead
Maintain a unit ledger with explicit conversion factors. Label every number as site or source energy, reconcile the boundary, and check that savings are not counted in both supply and end-use accounts.
Treating commissioning as equivalent to M&V and using a single functional performance test at one operating condition as evidence of savings.
Both involve testing and data, so candidates blur the purposes: commissioning verifies systems meet design intent, while M&V quantifies savings.
What to do instead
Separate the commissioning plan, OPR/BOD, and functional performance tests from the M&V plan. Use trend data and normalized measurements over representative conditions for savings.