Use consistent inputs
Identify whether the numerator is an asking price, bid or verified completed-sale amount. Use the relevant documented set rating with its category in the denominator. Do not mix kVA with kW or a prime rating with a standby rating without identifying the difference. Preserve currency and transaction date.
Recognize what the ratio omits
Keep age, hours, condition evidence, configuration, accessories and removal terms beside the calculation. A ratio built from a complete delivered package is not directly equivalent to one built from an installed unit requiring seller-paid preparation. The arithmetic does not adjust those differences for you.
Check a hypothetical example
A hypothetical $20,000 offer on a documented 200 kW set produces $100 per kW. That result does not establish that a different 1,000 kW generator is worth $100,000. It only describes the original price-to-rating relationship, subject to the original offer’s terms and evidence.
Use the ratio as a question prompt
If two ratios differ, ask which equipment or scope facts could explain the difference rather than automatically labeling one offer poor. Keep any adjustments supported and separate from the raw observations. When comparable evidence is sparse, report that limitation instead of presenting a precise ratio as a market valuation.