Fronius Review 2026
Fronius manufactures 11 models across inverters.
Headquartered in International · Manufacturing in Various
Founded 1945 by Günter Fronius · Headquartered in Pettenbach, Austria
Parent company: Fronius International GmbH (private, family-owned)
Fronius at a glance
Certifications: IEC 62109 · UL 1741-SA · Rule 21 · VDE · G99
Warranty: 10-yr product
Key milestones
- 1945 Founded in Pettenbach, Austria (originally welding/battery equipment)
- 1992 Entered solar inverter market
- 2019 Launched GEN24 Plus hybrid platform
Source: www.fronius.com/en/about-fronius · Last updated 2026-05-27
Fronius Pros & Cons (data-driven)
+ Pros
- ✓ Inverter peak efficiency averages 97.7% (above industry 97%)
− Cons
- ✗ Distributor and installer pricing varies — direct retail rarely available
- ✗ Some 2026 models depend on regional distributor availability
Pros and cons calculated against industry baselines: 21% panel efficiency, 12yr panel warranty, -0.32%/°C temp coeff, 90% battery RTE.
Current Fronius Product List (11)
Inverters (11)
| Model | Type | AC Power | Efficiency | Warranty | Verified | Details |
|---|---|---|---|---|---|---|
| Symo 20.0-3 480 | string | 20.0 kW | 98.1% | 10 yr | — | View → |
| Symo GEN24 Plus 15.0 | hybrid | 15.0 kW | 98.3% | 10 yr | — | View → |
| Symo 15.0-3 480 | string | 15.0 kW | 98% | 10 yr | — | View → |
| Symo GEN24 10.0 Plus | hybrid | 10.0 kW | 98.2% | 10 yr | ✓ | View → |
| Primo 10.0-1 | string | 10.0 kW | 97.6% | 10 yr | ✓ | View → |
| Symo 10.0-3 208 | string | 10.0 kW | 98% | 10 yr | — | View → |
| Primo 7.6-1 | string | 7.6 kW | 97.1% | 10 yr | ✓ | View → |
| Primo GEN24 6.0 Plus | hybrid | 6.0 kW | 98% | 10 yr | ✓ | View → |
| Primo GEN24 5.0 Plus | hybrid | 5.0 kW | 97.8% | 10 yr | ✓ | View → |
| Primo 5.0-1 | string | 5.0 kW | 97% | 10 yr | ✓ | View → |
| Primo 3.8-1 | string | 3.8 kW | 96.6% | 10 yr | ✓ | View → |
Spec Sheet Downloads
7 manufacturer-published datasheets available for Fronius products. All links go to the official PDF on the manufacturer's website.
- PDF Fronius Primo GEN24 6.0 Plus datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_GEN24_GEN24Plus_3_to_6_kW_EN.pdf
- PDF Fronius Symo GEN24 10.0 Plus datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_GEN24_Plus_208_240_EN_US.pdf
- PDF Fronius Primo GEN24 5.0 Plus datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_GEN24_GEN24Plus_3_to_6_kW_EN.pdf
- PDF Fronius Primo 3.8-1 SnapINverter datasheet →https://www.fronius.com/en-us/usa/solar-energy/installers-partners/technical-data/all-products/inverters/fronius-primo-ul/fronius-primo-3-8-1-208-240
- PDF Fronius Primo 5.0-1 SnapINverter datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_3.8_to_15.0kW_EN.pdf
- PDF Fronius Primo 7.6-1 SnapINverter datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_3.8_to_15.0kW_EN.pdf
- PDF Fronius Primo 10.0-1 SnapINverter datasheet →https://www.fronius.com/en/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Primo_3.8_to_15.0kW_EN.pdf
Recent Fronius News
SolarSpec does not republish third-party news. For the latest Fronius news — product launches, financial filings, recalls, supply-chain updates — search Google News directly.
Search Fronius news on Google News →Related Brands
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Frequently Asked Questions
What is the SolarSpec Score for Fronius?
Fronius earns a SolarSpec Score of 79/100 (Grade B) based on the weighted average of all 11 models in their 2026 lineup. The score combines efficiency, warranty, temperature coefficient, and verification status. See our /methodology/ page for the full formula.
How many solar products does Fronius offer in 2026?
Fronius offers 11 products in their 2026 lineup: 11 inverters.
Where can I download Fronius datasheets?
We have direct manufacturer-published datasheet links for 7 of 11 Fronius products. See the Spec Sheet Downloads section below for direct PDF links.
How we score brands
Every Fronius model in our catalog is scored 0-100 using a transparent formula: efficiency (25 pts), product warranty (20 pts), performance warranty bonus (3 pts), temperature coefficient (12 pts), and datasheet verification (5 pts), on a 50-point baseline. The brand-level score is the simple average across all 11 models.
Read the full SolarSpec methodology →