Maintenance plan vs manufacturer vs installer warranty

What does a solar maintenance plan cover compared with a manufacturer warranty and an installer warranty?

A manufacturer warranty covers a defective product: the maker repairs, replaces or credits the faulty part. As of November 2026, the standard warranties from SolarEdge, Enphase, Tesla and REC do not pay the homeowner for the labor to remove and reinstall it. An installer warranty covers the installer’s own workmanship, on the terms in your installation contract, for as long as the installer can honor it. A maintenance plan such as Otovo Care is a paid service (monitoring, a response time and repair discounts). It does not replace either warranty.

Manufacturer warranties (as of November 2026)

Each summary below is from the manufacturer’s own US warranty document, named with its revision. Read your own document: terms depend on the product and the date it was installed or activated.

SolarEdge inverters and power optimizers

Document: SolarEdge Limited Product Warranty, effective April 15, 2026, linked from solaredge.com/us/warranty.
Term: 25 years for power optimizers; 12 years for most inverters (10 years for Nexis inverters). SolarEdge’s US page says inverter warranties can be extended to 20 or 25 years for a one-time fee.
Covers: defects in materials and workmanship. SolarEdge chooses whether to repair, replace or credit the unit, and pays shipping for the return and the replacement.
Labor: on-site labor, travel, removal and reinstallation are not covered unless SolarEdge agrees in writing.
Main exclusions: improper installation, unauthorized changes, surges, lightning, fire, flood, pests, cables and connectors, cosmetic defects; the document also requires the product to stay connected to SolarEdge’s monitoring platform.
Transfer and claims: transferable for the rest of the term while the product stays in its original country; the buyer files by email to SolarEdge support with the serial number and proof of purchase.

Enphase microinverters

Document: Enphase Limited Warranty WRTY-00279-1.0 (US, for systems activated from November 15, 2026). Enphase lists a separate document for each activation period at enphase.com/warranty/us.
Term: 25 years for IQ7, IQ8 and IQ9 microinverters; 5 years for the IQ Gateway and IQ Combiner; 10 years for the IQ System Controller.
Covers: defects in materials and workmanship at the original location. Enphase repairs or replaces the unit, or refunds the purchase price less depreciation, and provides a prepaid return label.
Labor: the warranty does not include labor to uninstall, reinstall or troubleshoot. Enphase’s separate labor reimbursement policy (LRP-00009-2.0-EN, effective February 1, 2026) pays installers, not homeowners: $200 per truck roll plus $25 per microinverter replaced, within the first two years after activation.
Main exclusions: improper installation, damage from fire, water, pests or voltage outside limits, service by others that causes damage, out-of-date firmware where an update would have prevented the defect, cosmetic wear.
Transfer and claims: a later owner is covered after a change-of-ownership form, a transfer fee and registration; the covered owner starts the return (RMA) process, and claims are due within 90 days of finding the defect.

Tesla Powerwall

Document: Tesla Powerwall Limited Warranty (USA), Rev. 1.0, effective August 21, 2023; it covers Powerwall 2 AC, Powerwall+, Powerwall 3 and the Gateway.
Term: 10 years from installation, with at least 70% of the stated energy capacity retained at 10 years; Tesla may honor as little as 4 years if the Powerwall stays offline or unregistered for long periods.
Covers: defects; Tesla chooses to repair, replace (new or refurbished) or refund.
Labor: the warranty states that Tesla will not pay for labor or other service costs.
Main exclusions: installation or repair not to Tesla’s specifications, repair by anyone other than Tesla or a Tesla certified installer, accidents, lightning, flood, fire, moving the unit without consent.
Transfer and claims: a later owner with proof of ownership can claim; the owner contacts the certified installer who sold it, or Tesla if that installer cannot be reached.

REC solar panels

Documents: REC Warranty Conditions – REC Alpha Products, Rev 9 (October 2026), and the REC Warranty Fact Sheet (US version), v.20221216.
Term: a 20-year product warranty and a performance warranty of at least 92% of rated power at year 25. Through an REC certified installer, the ProTrust package extends the product warranty to 25 years.
Labor: the standard warranty does not cover on-site labor. ProTrust adds 25 years of labor for systems under 25 kW, paid as a fixed fee to the certified installer.
Main exclusions: improper installation, repair or removal by someone who is not a qualified technician, surges, lightning, fire, flood, animal damage, cosmetic wear.
Transfer and claims: transfers only to a later owner of the same building with the panels still installed there; claims go through recgroup.com/claims with proof of purchase.

Installer warranties

An installer’s workmanship warranty is a promise by that installer, so its length and what it covers are whatever your installation contract says. No manufacturer sets it. Two things follow from the manufacturer documents above. First, the programs that pay for warranty labor (Enphase’s labor reimbursement, REC ProTrust) pay the installer, not you. Second, when the installer has closed, the part may still be under the manufacturer’s warranty, but nobody is paid to fit it, so you pay for the visit. See who services solar panels when the installer is gone.

Maintenance plans: Otovo Care (as of November 2026)

Price: Core $9, Prime $29 and Ultra $49 a month, on otovo.com/pricing.
Includes: 24/7 solar and battery monitoring, remote troubleshooting, a technician on site within 48, 24 or 12 hours (by plan) of your approving the visit, 10% off repairs and 5% off add-ons, and $50 off one inspection or panel cleaning.
Does not include: the repair itself. Otovo’s FAQ says service work is quoted and billed separately, and that the plan complements rather than replaces an installer warranty.
Warranty work: Otovo’s Texas service page says it will not charge for work still covered by an active workmanship warranty from an installer that is still in business.
Cancelling: monthly, with no long-term contract, per the pricing page FAQ.

Which one pays for what

A faulty inverter, microinverter or battery

The manufacturer replaces the part under its warranty. You pay for the labor unless your installer’s warranty or a manufacturer labor program covers it.

A loose connection, a leak or wiring the installer got wrong

This is workmanship: the installer’s warranty, if it is still in force and the installer still operates. Manufacturer warranties exclude improper installation.