Reroofing an O‘ahu Home with Solar: Plan the Handoffs First

If your O‘ahu home needs a new roof and already has solar, involve both the roofer and solar contractor before booking the work. Agree on who will remove and store the equipment, confirm the roof is ready, and return the system to service. If you lease the solar system, start with its owner or manager.

The most useful starting point is a written scope that names who is responsible at each handoff. It helps you compare proposals and gives both crews the same expectations.

Start with Ownership and System Records

Check whether you own the solar system, financed its purchase, or have a lease or power purchase agreement (PPA). With a lease or PPA, contact the system owner or manager before arranging removal. Ask who can authorize the work and which contractor must perform it.

For an owned system, gather your original installation drawings, equipment list, HECO agreement, warranty documents, and any past service records. If something is missing, say so early. Your contractor can identify which information needs to be recovered or confirmed during an assessment.

Also share the roofing proposal. A change in roofing material or layout is something the solar contractor needs to evaluate before quoting reinstallation.

Agree on the Sequence Before Booking Crews

Ask your roofer and solar contractor to confirm these responsibilities together:

• Before removal: Who records the equipment condition, panel layout, and monitoring status?
• During removal: Who disconnects the system, labels the equipment, and protects the remaining work area?
• While roofing proceeds: Where will panels and components be stored, and who is responsible for handling or damage?
• Before reinstallation: Who confirms that the roof is ready and agrees on attachment locations and weatherproofing responsibilities?
• At completion: Who performs system testing, restores monitoring, and provides closeout records?

These are questions to settle in the scope, not a promise that every contractor includes the same services. Identify one scheduling contact for each crew and agree on how weather delays or newly discovered roof damage will be communicated.

Separate Reinstallation from Upgrades

Putting an existing system back into service and expanding it are different scopes. If you are considering new panels, an inverter replacement, or a battery, raise that before removal so the proposal accounts for design and approval work.

HECO directs customers changing equipment under an existing solar agreement to submit an amendment, subject to review. Ask your contractor which requirements apply to your proposed work; do not assume a reroof gives automatic permission to change equipment or export capacity. HECO’s equipment amendment guidance

If you have Net Energy Metering (NEM), make preserving your existing agreement an explicit planning question. Get the proposed equipment changes and HECO review path documented before approving them.

Check the Exact Permit Scope

Honolulu’s code includes exemptions for certain reroofing work and qualifying like-for-like solar component replacements. Those exceptions have conditions; they do not establish that every solar removal and reinstallation project is exempt. Ask the contractors to confirm with the Department of Planning and Permitting which permits and inspections apply to the roof, electrical work, and any structural or equipment changes. Honolulu permit requirements and exemptions, § 18-3.1

Keep city permit requirements separate from HECO’s interconnection requirements. Resolving one does not answer the other.

Compare What the Quote Actually Includes

Request an itemized proposal covering removal, storage, reinstallation, testing, and any approval work. Ask how the contractor will handle damaged panels, worn mounting components, or equipment that cannot be reused. Confirm that replacement parts and attachment methods will be checked against the applicable manufacturer’s requirements.

Ask who handles roof penetrations and which company responds if a roof or solar issue appears afterward. Review the written warranty terms for both scopes rather than assuming all existing coverage continues unchanged.

Also ask how long the system is expected to be offline and what could extend that period. Use the project-specific estimate for planning; a generic turnaround promise will not account for your roof, equipment, weather, and approvals.

Your Reroof Planning Checklist

Before you commit to dates, have these five items in one place:

• System ownership and authorization to arrange the work.
• Roofing scope, solar equipment records, and proposed equipment changes.
• Written responsibilities for removal, storage, attachments, and weatherproofing.
• The permit and HECO review requirements for your specific scope.
• A completion plan covering testing, monitoring, documentation, and follow-up contacts.