THE SHORT ANSWER
The linked KUA agreement distinguishes a rating modification requiring a new application at least 30 days beforehand from an additional renewable system requiring 60 days’ written notice. The latter covers either a shared inverter or separate inverters. [1] Ask KUA which provisions apply to the actual scope; neither period is an automatic approval countdown.
Decide what problem the addition should solve
Start with the reason for changing the system: higher household use, a new EV, a production problem or a planned equipment replacement. These are different projects. KUA encourages an energy audit when considering more panels. [3] Compare recent production with matched dates on the electric bills before concluding that more capacity is needed. If monitoring is offline or equipment is malfunctioning, document that separately. Adding modules does not explain an existing fault. Keep the desired outcome specific enough that a designer can compare repair, efficiency work and added capacity without promising that any option eliminates the bill.
Reconstruct the approved baseline
Gather the existing agreement, permit closeout, operating authorization, one-line drawing and equipment list. KUA’s current application page asks additions and upgrades to include the existing inverter, panel model, count and per-panel wattage. [2] Note which records are verified and which are missing. Do not replace an unknown inverter model with a guess from an online photo. A qualified technician can document accessible equipment safely. If a lease or other ownership arrangement applies, identify who can authorize physical changes before requesting an installation date or buying equipment.
Describe both the old and proposed systems
Use two equipment lists and one combined drawing prepared by the project team. Describe which modules remain, which are removed, what is added, and whether the inverter arrangement changes. Hypothetical example: an owner has 20 existing modules and proposes six more on another roof plane. “Six-panel addition” leaves important questions unanswered: are those modules connected through the existing inverter, a new inverter or a different complete design? Send the proposed configuration to KUA for written direction. The same-inverter detail alone does not exempt a separate-inverter addition from the 60-day clause. [1]
Build the calendar around decisions, not elapsed days
Maintain separate rows for scope confirmation, utility direction, application or notice submission, permit review, work scheduling and operating approval. Record the document version and recipient for each submission. Ask KUA to clarify how any applicable notice provisions interact, rather than selecting the shorter period or assuming they can be added together. A date on a sent email does not establish that a complete application was accepted. If the scope changes while review is underway, ask what must be resubmitted and update the project calendar before confirming crew or material commitments.
Compare the whole change and close it out
Request a written scope showing design work, equipment, roof penetrations, electrical changes, permits, utility coordination and commissioning responsibilities. Compare the revised production estimate with the existing system using consistent assumptions, and keep any predicted bill effect separate from the energy estimate. Ask who updates monitoring so the expanded system is not confused with its former layout. At completion, collect the final equipment inventory, approved revisions, inspection evidence and applicable utility authorization. Follow the responsible utility and installer’s operating instructions; do not energize new work simply because a notice period has passed. These records create a clear baseline for later service and help a future provider distinguish old equipment from the addition.
Before your next conversation
- Document the existing approved system.
- Describe the combined proposed configuration.
- Ask KUA about both notice provisions.
- Keep permit, utility and commissioning evidence separate.
Primary sources
- KUA: Application for Interconnection and tier agreements
Checked October 17, 2026 against the packet linked from KUA’s Net Metering page. Confirm the accepted version and requirements for the actual project with KUA.
- KUA: Net Metering application process
Checked October 17, 2026. Current application, additions and service-order instructions; published allowances are not a property-specific completion promise.
- KUA: Rooftop solar frequently asked questions
Checked October 17, 2026. PV-solar application, final-permit and meter sequence. Community solar is a separate program.
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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