THE SHORT ANSWER
KUA’s interconnection agreement says the renewable system’s gross power rating must not exceed 90% of the customer’s KUA distribution-service rating and assigns required upgrade costs to the customer when it does. [1]
Do not estimate the service rating from a photo
Provide the service address and proposed gross power rating to the responsible project professional and KUA. A panel label or breaker size may be relevant, but it does not by itself establish the utility’s distribution-service rating or an upgrade decision.
Put the calculation beside the design
Record the KUA service rating used, calculate 90% of it and compare that figure with the proposed gross power rating. Ask who supplied each input and when. This makes the constraint auditable if a later module or inverter substitution changes capacity.
Require a written upgrade scope
If the proposal exceeds the threshold, ask KUA to identify the necessary distribution work and the contractor to separate its own electrical scope. Do not accept an invented allowance, completion date or claim that the utility “usually waives” the rule.
Compare a revised design honestly
A different array or inverter may fit within the limit, but it also changes annual production and project economics. Compare each option using the same usage history, shade assumptions and payment terms. Do not present a smaller system as equivalent without showing the consequence.
Retain the utility determination
Save the final service-rating basis, approved one-line and any upgrade correspondence with the property records. If activation stalls or the system is expanded later, this evidence helps separate utility capacity questions from permit or equipment issues.
Before your next conversation
- Ask KUA for the address-specific service basis.
- Calculate the 90% threshold visibly.
- Separate utility and contractor upgrade scopes.
- Compare revised production assumptions.
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.
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