Solar Installation Warranty vs Product Warranty

A solar installation warranty covers the installer’s defined work, while a product warranty covers a manufacturer’s defined equipment obligation. Neither label tells you the remedy, exclusions or claim route. A rooftop system can also have separate module-performance, battery-capacity, service, monitoring and insurance terms, so responsibility starts with diagnosis and documents.

This guide explains how to build that responsibility map before signing and how to use it after a fault. It is general information, not a legal interpretation of a particular contract.

What does an installation or workmanship warranty cover?

An installation warranty is the EPC or installer’s written commitment for specified workmanship and project scope. It may address mounting, cable routing, terminations, sealing, configuration or other listed work, but only the signed contract can establish the actual coverage, period, exclusions, remedy and claim process.

Ask the installer to state:

• Which work and balance-of-system items are covered.
• When coverage begins and whether handover or payment affects it.
• Which events and site conditions are excluded.
• Whether diagnosis, labour, travel and replacement materials are covered.
• How quickly a fault must be reported and through which channel.
• Whether another service company can work on the system without affecting coverage.
• What happens if the original installer cannot attend.

Do not rely on “complete system warranty” unless the contract defines every component, responsible party and remedy behind that phrase.

What does a solar product warranty cover?

A product warranty is the manufacturer’s written obligation for a named product and stated conditions. Modules, inverters, batteries, meters and communications equipment can each have separate policies. A duration in a quotation does not establish whether the remedy is repair, replacement, parts, credit or another stated outcome.

For each product, retain the exact model and serial number, invoice, warranty policy, registration confirmation and authorised claim route. Compare these terms:

The solar inverter warranty guide applies these questions to the inverter. Do not copy one manufacturer’s policy to another product or model.

How are product, performance and capacity warranties different?

Product, performance and capacity warranties address different obligations and can use different tests and remedies. A module product policy may address defects, a module performance policy may address stated output over time, and a battery policy may define retained capacity under specified use. None should be treated as whole-system output insurance.

Read the measurement procedure as closely as the headline. Ask who performs the test, under which conditions, who pays access and shipping, and what happens if the result qualifies. A performance remedy may not reimburse lost generation or installation labour unless the policy says it does.

The sales quotation should list each warranty separately, with a link or attachment to the controlling document. The solar quotation checklist helps identify missing model numbers and responsibilities before payment.

Who is responsible when the symptom could have several causes?

Do not assign responsibility from the symptom alone. Low generation, shutdowns, water entry or monitoring loss can arise from equipment, installation, grid, communication, environment or operation. A qualified diagnosis should identify the failed function and supporting evidence before a warranty route is chosen.

Use a responsibility map like this:

Keep the installer and manufacturer informed where responsibility is uncertain. Written findings reduce the risk of one party diagnosing from incomplete information.

Which documents should the owner receive at handover?

The handover pack should connect the physical system to every contract and claim route. It needs exact equipment identities, as-built information, commissioning records, warranty policies, registrations, monitoring access and service contacts. Without this pack, even a valid claim can be difficult to route and diagnose.

Retain:

• Signed proposal, scope, contract, change orders and payment records.
• Tax invoice and equipment schedule with model and serial numbers.
• As-built single-line diagram and relevant layout or string records.
• Commissioning results, settings and dated photos.
• Product warranty policies and registration confirmations.
• Workmanship, service and maintenance terms.
• Monitoring ownership, administrator access and data export instructions.
• DISCOM, net-metering and scheme records applicable to the project.
• Insurance schedule and claim contact, if insured.
• Installer, manufacturer, distributor and authorised service contacts.

The commissioning and handover checklist provides a field-by-field record for the technical portion.

How should warranty promises be compared before signing?

Compare remedies and responsibilities, not just years. Give each bidder the same fault scenario and ask who diagnoses it, who attends the site, who removes equipment, who pays freight, who reinstalls it, and what evidence the owner must supply. Record the answer in the contract or controlling policy.

Also check whether coverage transfers when a property is sold, whether maintenance by another qualified provider is allowed, and whether registration has a deadline. Do not assume a verbal promise from a salesperson changes the written terms.

If the quote combines equipment and installation into one headline warranty, ask which legal entity stands behind each obligation and how a claim is divided if the cause is disputed.

What should an owner do when a fault occurs?

Preserve the original fault evidence, follow the approved safety process and notify the relevant parties in writing. Record the code, time, operating conditions and visible external state without opening equipment. Request a ticket number, diagnosis, coverage decision, next step and responsibility for each cost.

Use this sequence:

1. Follow the site’s emergency or isolation instructions if there is an immediate safety concern.
2. Record the symptom and equipment identity.
3. Review the installer and product claim routes.
4. Notify the installer and relevant product support where the cause is uncertain.
5. Obtain a qualified written diagnosis.
6. Ask each party for a written coverage decision and reason.
7. Keep all invoices, replaced parts records and recommissioning results.

Do not let an unqualified person open an inverter or battery to produce evidence. That can create safety risk and complicate the diagnosis or remaining coverage.

What if the solar installer disappears or does not respond?

First preserve the complete project and communication record, then separate product support from the missing installer’s obligation. A manufacturer or authorised service channel may still assess a product issue under its own policy, but it does not automatically inherit the installer’s workmanship or contract responsibilities.

Contact the manufacturer or distributor using the policy’s current route and ask for an authorised diagnostic option. An independent qualified solar professional can document the present condition and identify urgent safety work, but ask how that work may affect existing product coverage before it begins.

For an unresolved consumer matter in India, consult the current National Consumer Helpline information or obtain advice from a qualified legal professional. This article cannot determine whether a particular claim succeeds or which party is legally liable.

What should be checked before another company takes over?

A replacement service provider should audit the records and present condition before accepting ongoing responsibility. Define whether the new scope is diagnosis, corrective work, maintenance or a fresh warranty. Do not let a new annual-maintenance contract silently promise coverage for pre-existing defects it has not assessed.

Ask for a written takeover report that records inaccessible documents, existing faults, design deviations, safety items, monitoring access and products still under manufacturer coverage. Keep old responsibilities separate from new work.

Use the authorised service partner directory for Qbits equipment or contact Qbits for the current product-support route. For a new project, the residential solar enquiry page can start a documented system discussion.

Sources checked 23 September 2026: the Qbits inverter warranty guide, quotation checklist, commissioning checklist, current service destinations and India’s National Consumer Helpline. Contract, product-policy and legal conclusions require review of the controlling documents by the appropriate owner or qualified adviser.