X3-FTH-80K-10anni
+10 year warranty extension for the Solax X3-Forth 80 kW commercial three-phase inverter (X3-FTH-80K). Added to the standard warranty, it brings the total coverage to 15 years from commissioning: the maximum extension available for this model. Includes unit replacement, original spare parts, remote diagnostics, and official Solax technical support.
+10 year warranty extension for the commercial three-phase inverter Solax X3-Forth 80 kW (X3-FTH-80K). By adding this package to the manufacturer's standard warranty, the total inverter coverage reaches 15 years from the commissioning date: the most extensive coverage offered by Solax for this model, designed for commercial and industrial systems with a long operational horizon.
What the warranty extension includes
The X3-FTH-80K-10years package extends the Solax limited warranty terms on the X3-Forth 80 kW inverter by 10 years. The 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 inbound/outbound transport costs, labor for replacement/on-site service, and damage caused by non-compliant installation, external overvoltages, exceptional weather events, unauthorized modifications, and third-party parts installed on the inverter (non-Solax batteries, third-party monitoring devices, etc.).
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 | +10 years |
| Total coverage duration | up to 15 years from commissioning |
Target inverter
| Model | Solax X3-Forth (code X3-FTH) |
| Nominal power | 80 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 the +10 year package worthwhile?
The +10 year package is the recommended choice in specific scenarios:
- Systems with an operational horizon > 10 years: energy communities, industrial plants on the roofs of established facilities, long-term PPA contracts
- Systems with difficult operational access: high-altitude roofs, large industrial roof areas, warehouses with restricted access — any out-of-warranty replacement intervention has high additional costs
- Protection of the asset's residual value: a 15-year warranty makes the system more attractive in case of sale/transfer of the site
- Compliance with tender specifications: for public tenders and PNRR calls, an inverter warranty requirement of ≥ 10-12 years is common
How to activate the extension
- The X3-FTH-80K 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 provided by Solax policy (check the Warranty Terms & Conditions in force at the time of activation)
- 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 80 kW (code X3-FTH-80K). For other power ratings in the X3-Forth series (100, 110, 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 from the commissioning date. With this package, you add +10 years, bringing the total coverage to 15 years: the maximum extension available for this model. If the inverter is registered and connected to SolaxCloud, Solax grants an additional free year on spare parts.
Is the 10-year or the 5-year package more worthwhile?
The +10 year package (this product, total warranty 15 years) is recommended for commercial and industrial systems with a long operational horizon, for roofs with high technical accessibility, for systems subject to tender specifications with warranty requirements ≥ 10 years. The +5 year package (X3-FTH-80K-5years, total warranty 10 years) is preferable when the amortization plan is shorter and you want to minimize the extension cost.
Does the extension also cover accidental damage or overvoltages?
No. The extension covers material and workmanship defects, in line with the Solax Limited Warranty Terms & Conditions. Excluded: lightning damage, external overvoltages not managed by installed 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 insurance 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 (the exact terms are published in the Solax "Warranty Terms & Conditions" in force at the time of inverter activation). 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 and commissioning date.
What is included and what is excluded from the coverage?
Included: replacement of the unit for covered defects, supply of original Solax spare parts, remote diagnosis and technical support, transfer of remaining warranty to the replacement product. Excluded: inbound/outbound transport costs, labor for replacement and on-site service, external damages not covered, third-party parts installed on the inverter (e.g. non-Solax batteries, non-Solax monitoring systems). For full details, refer to the official "Solax Warranty Terms & Conditions" document published on solaxpower.com.
