THE SHORT ANSWER
FPL publishes an AC gross power rating equal to the array’s DC rating multiplied by 0.85. Its Tier 1 ends at 10 kW AC gross. Use that application definition, not an inverter model name, to discuss your tier. [1]
Start with the module schedule
The array DC rating comes from the modules specified in the design. In a hypothetical proposal, 27 modules rated at 430 watts total 11,610 watts, or 11.61 kW DC. Applying the published factor gives 9.8685 kW AC gross. Those chosen module quantities illustrate the arithmetic only; they are not an Origin equipment offer or a recommendation to maximize a threshold.
Check a revision before dismissing it as minor
Adding one of those hypothetical modules produces 12.04 kW DC. Multiplying by 0.85 gives 10.234 kW AC gross, above the stated Tier 1 limit. The extra panel changes more than the drawing. Ask the project team to show the utility classification on each revision, together with the corresponding application requirements. Do not round the underlying figures early to make a system appear to remain in a lower tier.
Separate three numbers with three purposes
Array DC capacity, inverter AC output and the utility’s application gross rating may all appear in a proposal. Label each one. The application arithmetic is not a prediction of instantaneous rooftop output or annual energy production. Nor is a lower inverter label a substitute for the utility’s gross-rating method. A comparison becomes clearer when the designer explains which number is being used for each decision.
Ask for the complete consequence, not only the tier name
Have the installer identify the current documents, insurance evidence, fees and equipment requirements applicable to the proposed tier. Obtain any insurance advice from your insurer or licensed agent, using the utility’s actual requirements. A solar estimate cannot establish that an existing policy satisfies them. Keep those costs and decisions visible without assuming that moving into a different tier makes the project automatically unsuitable.
Confirm before finalizing the layout
This calculation is FPL-specific guidance checked on September 9, 2026. Do not automatically apply it to a municipal utility or cooperative. In an Origin Direct review, ask for the current layout, exact module rating, unrounded calculation and confirmation of the utility requirements. That gives you a clear explanation of why a proposed panel count was selected, rather than an unexplained claim that one particular system size is always best.
Before your next conversation
- Record module count and watts per module.
- Keep DC capacity and AC gross rating separately labeled.
- Recheck the classification after a design revision.
Primary sources
- FPL: Net Metering FAQs
Primary reference checked September 9, 2026. Applies only to the named program or equipment; confirm current terms for your property.
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 to show the tier calculation beside your proposed array layout.
Book an Origin Direct review →Scope, pricing and availability are confirmed for your property. A consultation does not establish utility or incentive approval.