Solar Inverter Warranty Guide: Avoid Costly Inverter Repairs
Table of Contents
-- Reliable Inverter Repairs
Your solar inverter converts the power your panels produce into electricity you can actually use. When it stops working, your inverter warranty can determine whether the equipment itself is covered and which repair costs you may still have to pay. Coverage varies a lot by brand, model, and how long you have owned the system.
SolarEdge owners may have different terms for the inverter and the power optimizers. SolarEdge currently provides a 12-year limited warranty on its inverters and 25 years on power optimizers. Enphase, Fronius, and SMA each use different warranty structures, so your model and installation date matter more than any general rule.
If your installer is unresponsive or out of business, GreenLancer can help you determine your inverter's warranty status, navigate the claim process, and arrange solar inverter repair services through our nationwide network.
How Long Does a Solar Inverter Warranty Last?
Solar inverter warranties commonly range from about 10 to 25 years. Many string inverters carry base terms around 10 to 12 years, while current Enphase IQ microinverters and SolarEdge power optimizers carry 25-year limited warranties. Some manufacturers also offer paid extensions on top of the standard term.
Inverter or Brand | Warranty Term | Note |
SolarEdge inverter | 12 years | Extendable to 20 or 25 years depending on model |
SolarEdge power optimizer | 25 years | Separate from the inverter warranty |
Enphase IQ microinverter | 25 years | Other Enphase components may carry different warranty terms |
Fronius inverter | Up to 10 years complimentary | Paid extension available for up to 15 years total; terms vary by region and model |
SMA inverter | Varies by model | Factory and extended warranty options differ by product; check your serial number |
Tigo optimizer | 25 years | Separate from the Tigo inverter warranty |
Tigo inverter | 152 months (about 12.7 years) | Extendable to 25 years total |
Growatt inverter | 10 years | Paid extension available; terms vary by region and model |
These are typical lengths, not guarantees. Your exact warranty depends on your model, install date, and whether you registered the product. Check your inverter's serial number against the manufacturer's current terms before assuming a structure applies to you.
Your inverter type also affects what happens when something fails. A string inverter failure can stop production across a large part of your array, since one unit serves many panels. A microinverter failure usually only affects the panel it is attached to, so downtime looks different even when the underlying warranty terms are similar.
Find your exact warranty length in three steps:
Locate the model and serial number on the inverter nameplate or in your monitoring app
Look up the manufacturer's current warranty terms for that model
Confirm whether the product was registered, since registration can extend or activate coverage
What Does a Solar Inverter Warranty Cover? (Parts vs. Labor)
A solar inverter warranty generally covers defects in materials or workmanship for the covered equipment. It does not automatically mean the manufacturer pays for troubleshooting, technician labor, roof access, or shipping. Coverage for those extras varies by brand and warranty tier, as EnergySage's inverter warranty comparison lays out in more detail.
Cost or Item | Usually Covered? | What to Check |
Defective inverter or part | Often | Manufacturer's warranty terms |
Replacement shipping | Sometimes | Freight and return terms |
Diagnostic labor | Often not included | Labor reimbursement or a service plan |
Removal and reinstallation | Often not included | Installer or service-plan coverage |
Roof access | Often not included | Contractor charges |
Lightning or flood damage | Often excluded | Homeowners insurance |
Replacement equipment | Often | New versus refurbished unit |
Equipment Warranty vs. Workmanship Warranty
An inverter manufacturer's warranty covers eligible defects in the equipment under its own terms. A workmanship warranty comes from your solar installer and covers certain installation-related problems separately. If your original installer has closed, its workmanship warranty may no longer be usable even though the manufacturer's inverter warranty remains available.
If your inverter is outside its warranty period entirely, our solar inverter repair guide covers typical repair and replacement costs.
Solar Inverter Warranties by Manufacturer
Warranty terms differ enough between manufacturers that it is worth checking your specific brand before assuming standard coverage. Below is a breakdown of what each major manufacturer currently offers, based on their own published terms.
Enphase Microinverter Warranty
Enphase backs eligible IQ series microinverters with a 25-year limited warranty, matching most solar panel warranties. Other Enphase system components, including gateways and combiner equipment, can carry different warranty periods, so check the warranty schedule for the specific product installed. Full details are available through Enphase's warranty overview.
SolarEdge Inverter Warranty
SolarEdge splits coverage across several products and services, so it helps to know which one applies to your situation.
Standard inverter warranty
SolarEdge inverters carry a 12-year standard limited warranty. Eligible models can be extended to 20 or 25 years. You can check your SolarEdge inverter warranty extension eligibility using your inverter's serial number.
Power optimizer warranty
SolarEdge power optimizers carry a separate 25-year limited product warranty. That means a single SolarEdge system can have two different warranty expiration dates, one for the inverter and one for the module-level optimizers.
SolarEdge Extended warranty
An extended warranty is a separate purchase from the standard inverter coverage and only applies to the inverter itself, not communication accessories or optimizers. There is a limited window to buy it after your inverter ships, and SolarEdge's public pages currently list different purchase windows, so it is best to register early and verify your exact eligibility using your serial number.
Power Care
Power Care is a separate service plan, not an extension of your SolarEdge warranty. SolarEdge's Power Care plans come in Lite and Premium tiers, with Premium adding free on-site equipment replacement and $0 labor costs for incidents covered under warranty. Check SolarEdge's page directly for current pricing and state availability.
Fronius Inverter Warranty
Fronius currently offers up to 10 years of complimentary Warranty Plus coverage on new inverters, with registration on Solar.web confirming your start date and issuing a warranty certificate. A paid extension can push coverage to 15 years total. Check Fronius's current warranty terms since the structure has changed more than once in recent years.
SMA Inverter Warranty
SMA's factory and extended warranty terms vary by inverter model and product line. You can find current terms, registration steps, and extension options through SMA America's service and support page, using your inverter's model and serial number.
Tigo Inverter and Optimizer Warranty
Tigo splits coverage similarly to SolarEdge. TS4 module-level optimizers carry a 25-year limited warranty, while Tigo's EI and GO string inverters carry a standard 152-month term, or about 12.7 years. That inverter term can be extended to 25 years total. Check Tigo's warranty documentation for the specific product installed, since terms updated for products purchased after May 22, 2024.
Growatt Inverter Warranty
Growatt's standard factory warranty for residential inverters currently runs 10 years from installation. Paid extensions are available beyond that, with the exact length varying by region and model. As with any brand, verify current terms using your inverter's serial number before assuming coverage.
If you own an ABB or FIMER inverter: FIMER acquired ABB's solar inverter business in 2019, then filed for bankruptcy in late 2023 before being acquired for relaunch. If you are having trouble reaching the manufacturer for a warranty claim, that ownership history may be why. GreenLancer can help you assess your options if your original manufacturer is difficult to reach.
Not sure which of these applies to your system? Contact GreenLancer and our team can help you determine your inverter's warranty status and navigate the claim process.
What Can Cause an Inverter Warranty Claim to Be Denied?
Warranty coverage has limits, and it helps to know what can put a claim at risk before you are in the middle of one. Under the Magnuson-Moss Warranty Act, a manufacturer generally cannot deny your solar inverter warranty just because you used an independent technician instead of their own service network, as the FTC's guidance on repair restrictions explains. That said, certain issues can still put your coverage at risk.
A few common reasons a claim gets denied:
Damage or failure caused by unauthorized modifications to the unit
Damage or failure caused by installation that does not meet applicable manufacturer requirements
Damage caused by excluded events such as flooding, lightning, or pests, depending on the warranty terms
A product that is outside its warranty period or otherwise ineligible under its specific terms
Inverters carry real electrical risk, including shock and arc-flash hazards, so any internal repair should go through a qualified professional following manufacturer procedures. That protects your safety and your coverage at the same time.
If you are seeing a specific error first, our solar inverter fault code guide, SolarEdge troubleshooting guide, and Enphase troubleshooting guide can help you figure out what is happening before you call anyone.
How to File a Solar Warranty Claim
Filing a claim is usually straightforward once you know the steps involved. Start by confirming coverage, then document the problem, and work with either your installer or the manufacturer directly.
What You'll Need Before You Start
Inverter model and serial number
Installation date and proof of purchase
Error codes or screenshots from your monitoring app
Six Steps to File a Claim
Verify coverage. Confirm your inverter is still within its warranty period using the serial number.
Document the problem. Note any error codes, lights, or production drops before resetting equipment.
Gather your records. Pull together your installation date, proof of purchase, and monitoring history.
Open a support case. Contact your original installer if they are still in business, or the manufacturer directly if not.
Get the manufacturer's disposition. If they confirm an eligible defect, they may issue an RMA, authorize a replacement, or offer another remedy under the warranty terms.
Schedule qualified service. Have a qualified solar service professional handle the replacement according to manufacturer instructions and applicable electrical licensing requirements.
What If Your Solar Installer Is Out of Business?
A manufacturer's equipment warranty usually does not disappear just because the original installer closed up shop. You may need to work directly with the manufacturer to verify coverage and then find another qualified provider to handle the diagnosis, claim process, or replacement. GreenLancer works with homeowners in exactly this situation through our solar inverter repair services, helping you navigate the warranty claim and arranging the technician visit.
Is a SolarEdge Extended Warranty Worth It?
Whether the extension makes sense depends on how long you plan to keep your system and how the price compares to a full replacement. Here is a quick way to think it through.
An extended warranty may be worth it when:
Your standard coverage ends well before you expect to sell or replace the system
The extension cost is low relative to a full inverter replacement
You plan to keep your current inverter rather than upgrade
It may be less useful when:
You expect to replace or upgrade the inverter before the extended term kicks in
A service plan like Power Care already covers your main concerns
Your equipment does not qualify for extension under current terms
Whether you need help filing a claim, confirming your coverage, or handling a repair outside your warranty window, GreenLancer's team can walk you through it. Contact us and we'll help get your system back to full production.
Complete the form below to get started.
FAQs on Solar Inverter Coverage
What is a typical solar inverter warranty period?
Most string inverters carry 10 to 12 years of coverage, while microinverters and power optimizers often run 25 years. The exact term depends on your manufacturer and model, so check your serial number against current published terms.
Does a solar inverter warranty cover labor?
Often not. Standard manufacturer warranties primarily cover eligible equipment defects. Diagnostic labor, removal, reinstallation, and shipping coverage vary by brand, so check the specific warranty or a service plan like SolarEdge Power Care Premium before assuming those costs are included.
How do I check my SolarEdge inverter warranty?
Find the inverter serial number on the equipment label or in your system records, then enter it into SolarEdge's warranty check tool to see the recorded expiration date. SolarEdge notes that the binding warranty terms govern if the online result ever differs.
Can I use my inverter warranty if my installer went out of business?
Usually, yes. A manufacturer's equipment warranty does not automatically disappear because the original installer closed. You may need to work directly with the manufacturer to verify coverage, then find another qualified provider to diagnose or replace the equipment.
Is SolarEdge Power Care the same as an extended warranty?
No. An extended warranty extends the inverter's product coverage only. Power Care is a separate service plan that adds monitoring, troubleshooting, support, and, under the Premium plan, labor for eligible warranty repairs.
What can cause a warranty claim to be denied?
Common reasons include unauthorized modifications, installation that does not meet manufacturer requirements, damage from excluded events like floods or lightning, and equipment outside its warranty period.
What do I need to file a warranty claim?
Gather your inverter's model and serial number, your installation date, proof of purchase, and any error codes or screenshots from your monitoring app before you open a case.
Does a solar inverter warranty cover storm or lightning damage?
Usually not. Most manufacturers exclude damage from floods, lightning, and other extreme weather events. Your homeowners insurance and solar panels guide covers what to check on the insurance side instead.
Does a solar inverter warranty transfer to a new homeowner?
It depends on the manufacturer and warranty terms. Some inverter warranties remain with the equipment when a home is sold, while others have transfer requirements or eligibility conditions. Check the manufacturer's current terms using your inverter's model and serial number before assuming coverage transfers to a new owner.
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