THE SHORT ANSWER
KUA defines gross power rating as AC nameplate generating capacity and says inverter-based systems calculate it by multiplying total installed DC nameplate capacity by 0.85. [1]
Collect the nameplates
List module model, count and watts, then record every inverter or microinverter model and quantity. Use manufacturer nameplate values rather than the annual-energy estimate. The estimate is measured in kWh; the interconnection rating is a capacity calculation and answers a different question.
Show the arithmetic
Multiply module quantity by module watts to obtain installed DC watts, then apply KUA’s published 0.85 method where the agreement calls for it. Keep units visible and convert watts to kilowatts only once. Ask the applicant to show the same result on the application and one-line diagram.
Do not borrow another utility’s rule
FPL, TECO, OUC and KUA paperwork may use different definitions, thresholds or presentation. A calculation accepted on another account does not establish the KUA tier. Cite the KUA agreement in the design review and confirm the current form before submission.
Recalculate every equipment change
A panel substitution, added module or inverter change can alter the rating even when the sales proposal still uses the old annual production figure. Require a revised calculation and check whether the agreement, insurance or fee requirements change with the tier.
Preserve the final basis
Save the equipment cut sheets and the dated calculation with KUA’s approval and the installed equipment list. This record is useful if panels are added later or an orphaned system needs service, because a technician can see what capacity the utility reviewed.
Before your next conversation
- Record module and inverter nameplates.
- Show the DC total and 0.85 calculation.
- Confirm the tier on every KUA document.
- Recalculate after equipment changes.
Primary sources
- Kissimmee Utility Authority: Application for Interconnection
Primary reference checked September 9, 2026. Confirm the current form, tariff, account process and equipment instructions for your address and system.
Planning examples and questions are Origin’s editorial guidance, not a property-specific diagnosis, engineering design, tax determination or promise of savings. Manufacturer and utility references do not imply an affiliation with Origin.
Make the decision specific to your home.
Ask Origin Direct to check the KUA rating against the final equipment schedule.
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