--- title: "Fronius Primo 12.5-1 vs Growatt MOD 13KTL3-X - Inverter Comparison | ComparePV" description: "Compare Fronius Primo 12.5-1 vs Growatt MOD 13KTL3-X side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/fronius-international-fronius-primo-12-5-1/growatt-mod-13ktl3-x" updated: 2026-01-16 --- # Fronius Primo 12.5-1 vs Growatt MOD 13KTL3-X 16 differences, and they point both ways The largest is rated ac power: 0.50 kW apart. 6 of 22 comparable parameters are identical, with 10 more left out because at least one datasheet does not publish them. ## The two inverters | Attribute | A | B | | --- | --- | --- | | Inverter | [Fronius Primo 12.5-1](https://comparepv.com/inverter/fronius-international-fronius-primo-12-5-1) | [Growatt MOD 13KTL3-X](https://comparepv.com/inverter/growatt-mod-13ktl3-x) | | Manufacturer | Fronius International | Growatt | | Rated AC power | 12.5 kW | 13 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Fronius Primo 12.5-1 | MOD 13KTL3-X | Difference | | --- | --- | --- | --- | | Rated AC power | 12.50 kW | 13.00 kW | 0.50 kW apart | | Warranty | 10 yrs | 5 yrs | +5 yrs for Fronius Primo 12.5-1 | | Max DC voltage | 1000 V | 1100 V | 100 V apart | | Max input current per tracker | 33.0 A | 26.0 A | +7.0 A for Fronius Primo 12.5-1 | | Max efficiency | 96.7 % | 98.6 % | +1.9 pp for MOD 13KTL3-X | | Max AC power | 12.50 kW | 13.00 kW | 0.50 kW apart | | Weight | 37.4 kg | 16.0 kg | -21.4 kg for MOD 13KTL3-X | | Weight per kW | 3.0 kg/kW | 1.2 kg/kW | -1.8 kg/kW for MOD 13KTL3-X | | Grid connection | Single-phase | 3-phase | Single-phase vs 3-phase | | Nominal AC voltage | 240 V | 400 V | 160 V apart | | Max AC current | 52.1 A | 21.7 A | 30.4 A apart | | Start voltage | 80 V | 160 V | -80 V for Fronius Primo 12.5-1 | | Ingress protection | NEMA 4X | IP66 | NEMA 4X vs IP66 | | MPPT voltage range | 200-800 V | 140-1000 V | 200-800 V vs 140-1000 V | | Dimensions | 724x511x226 mm | 387x425x178 mm | 724x511x226 mm vs 387x425x178 mm | | Cooling | forced-air | natural | forced-air vs natural | ## Every compared parameter | Parameter | Fronius Primo 12.5-1 | MOD 13KTL3-X | | --- | --- | --- | | Rated AC power | 12.50 kW | 13.00 kW | | Max AC power | 12.50 kW | 13.00 kW | | Grid connection | Single-phase | 3-phase | | Nominal AC voltage | 240 V | 400 V | | Max AC current | 52.1 A | 21.7 A | | Max PV power | - | 19.50 kW | | DC/AC ratio | - | 1.50 | | Max DC voltage | 1000 V | 1100 V | | MPPT voltage range | 200-800 V | 140-1000 V | | Start voltage | 80 V | 160 V | | MPP trackers | 2 | 2 | | Strings per tracker | - | 2 | | Max input current per tracker | 33.0 A | 26.0 A | | European efficiency | - | 98.2 % | | Max efficiency | 96.7 % | 98.6 % | | CEC efficiency | 96.5 % | - | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 37.4 kg | 16.0 kg | | Weight per kW | 3.0 kg/kW | 1.2 kg/kW | | Dimensions | 724x511x226 mm | 387x425x178 mm | | Ingress protection | NEMA 4X | IP66 | | Cooling | forced-air | natural | | Noise | - | - | | Max operating temperature | 60 °C | 60 °C | | Wi-Fi | Yes | Yes | | Ethernet | Yes | Yes | | Arc fault protection | Yes | Yes | | Integrated DC switch | Yes | Yes | | Warranty | 10 yrs | 5 yrs | ## Related comparisons - [Fronius Primo 12.5-1 vs SolarEdge SE12.5K](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-12-5-1/solaredge-se12-5k) - 9 differences, the largest is warranty - [Fronius Primo 12.5-1 vs SolarEdge SE12.5K (Three Phase)](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-12-5-1/solaredge-solaredge-se12-5k-three-phase) - 8 differences, the largest is max efficiency - [Fronius Primo 12.5-1 vs Fronius International Symo Advanced 12.5-3-M](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-12-5-1/fronius-international-symo-advanced-12-5-3-m) - 8 differences, the largest is max efficiency --- Source: https://comparepv.com/compare-inverters/fronius-international-fronius-primo-12-5-1/growatt-mod-13ktl3-x Not in this file, on the page: a written summary generated on request.