X3-FTH-110K-5anni
+5 Year Warranty Extension for the commercial three-phase inverter Solax X3-Forth 110 kW (X3-FTH-110K). Added to the standard warranty, it brings the total coverage to 10 years from commissioning. Includes unit replacement, original Solax spare parts, remote diagnostics, and official technical support.
+5 year warranty extension for the commercial three-phase inverter Solax X3-Forth 110 kW (X3-FTH-110K). By adding this package to the manufacturer's standard warranty, the total coverage for the inverter reaches 10 years from the commissioning date, aligning with the typical payback period of a commercial or industrial photovoltaic system.
What the warranty extension includes
The X3-FTH-110K-5anni package extends the Solax limited warranty on the X3-Forth 110 kW inverter by 5 years. Coverage includes:
- Unit replacement in case of a warranty-covered failure (material or workmanship defects)
- Supply of original Solax spare parts
- Remote diagnosis and technical support via the Solax EU team (service.eu@solaxpower.com)
- Transfer of remaining warranty to the replacement product (for remaining warranties of less than 1 year, the term is automatically extended to 12 months)
Excluded are transportation costs, on-site labor, lightning damage, external overvoltages, exceptional weather events, non-compliant installation, unauthorized modifications, and third-party parts installed on the inverter.
Standard X3-Forth warranty and total duration
| Solax X3-Forth standard product warranty | 5 years |
| +1 year spare parts bonus (if inverter is registered and connected to SolaxCloud) | optional |
| Extension purchased with this package | +5 years |
| Total coverage duration | up to 10 years from commissioning |
Target inverter
| Model | Solax X3-Forth (code X3-FTH) |
| Nominal power | 110 kW |
| Type | Three-phase string inverter, commercial and industrial (C&I) |
| X3-Forth series power range | 75 / 80 / 100 / 110 / 120 / 125 / 136 / 150 kW |
| Main features | Efficiency up to 99%, 12 MPPT, 150% PV oversizing, IP66, integrated export control |
When is it worth buying the extension?
For a 110 kW C&I inverter, the warranty extension almost always makes sense, for three reasons:
- Protection of the payback plan: a ~110 kW system typically pays back in 7-10 years; extending the warranty to 10 years covers the entire payback period
- Replacement cost out of warranty: the value of an X3-Forth 110 kW far exceeds the cost of the extension
- Transparent up-sell to the end customer: for installers offering turnkey systems, including the extension in the proposal is a strong selling point and a reputational safeguard
How to activate the extension
- The X3-FTH-110K inverter must have been installed and commissioned by a certified Solax installer
- The inverter must be registered on the SolaxCloud portal with correct site and owner data
- The extension must be purchased within the time window specified by Solax policy
- After purchase, MR WATT registers the extension with Solax and provides the personalized warranty extension certificate
Frequently Asked Questions
For which inverter is this warranty extension valid?
Exclusively for the commercial three-phase inverter Solax X3-Forth 110 kW (code X3-FTH-110K). For other power ratings in the X3-Forth series (80, 100, 120, 125 kW), dedicated packages are available with different prices, indexed to the inverter's nominal power.
What is the total warranty duration with this package?
The standard Solax X3-Forth warranty is 5 years. With this package, you add +5 years, bringing the total coverage to 10 years. If the inverter is registered and connected to SolaxCloud, Solax grants an additional free year on spare parts.
Is the 5-year or 10-year package better?
The +5 year package (this product, total warranty 10 years) is the right choice if the operating horizon is about 10 years. The +10 year package (X3-FTH-110K-10anni, total warranty 15 years) is recommended for systems with a horizon beyond 10 years.
Does the extension also cover accidental damage or overvoltages?
No. The extension covers material and workmanship defects. Excluded: lightning damage, external overvoltages not managed by SPDs, exceptional weather events, non-compliant installation, unauthorized modifications, tampering, and failures caused by third-party components. To cover these risks, a separate all-risk policy is required.
Can I purchase the extension even a few years after installation?
Solax provides a specific time window within which it is possible to purchase the warranty extension. In general, it is preferable to purchase the extension at the same time or immediately after installation. For checks on a specific case, contact MR WATT support with the inverter's registration number.
What is included and what is excluded from coverage?
Included: unit replacement for covered defects, original Solax spare parts, remote diagnosis, technical support, transfer of remaining warranty to the replacement product. Excluded: transportation, on-site labor, external damages not covered, third-party parts. For details: official document "Solax Warranty Terms & Conditions".
