---
title: "Fronius Verto 33.3 vs SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) - Inverter Comparison | ComparePV"
description: "Compare Fronius Verto 33.3 vs SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/fronius-international-fronius-verto-33-3/solaredge-solaredge-se33-3k-k33-3se-with-dc-safety-unit-optional"
updated: 2026-01-16
---

# Fronius Verto 33.3 vs SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional)

SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) leads on the differences that matter

The largest is max input current per tracker: 12.0 A more headroom. 15 of 23 comparable parameters are identical, with 9 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Fronius Verto 33.3](https://comparepv.com/inverter/fronius-international-fronius-verto-33-3) | [SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional)](https://comparepv.com/inverter/solaredge-solaredge-se33-3k-k33-3se-with-dc-safety-unit-optional) |
| Manufacturer | Fronius International | SolarEdge |
| Rated AC power | 33.3 kW | 33.3 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | Fronius Verto 33.3 | SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) | Difference |
| --- | --- | --- | --- |
| Max input current per tracker | 28.0 A | 40.0 A | +12.0 A for SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) |
| Weight | 41.8 kg | 48.0 kg | -6.2 kg for Fronius Verto 33.3 |
| European efficiency | 97.8 % | 98.0 % | +0.2 pp for SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) |
| Nominal AC voltage | 400 V | 480 V | 80 V apart |
| Max AC current | 50.5 A | 40.0 A | 10.5 A apart |
| Ingress protection | IP66 | IP65 | IP66 vs IP65 |
| MPPT voltage range | 150-870 V | 680-1000 V | 150-870 V vs 680-1000 V |
| Dimensions | 865x574x279 mm | 775x315x260 mm | 865x574x279 mm vs 775x315x260 mm |


## Every compared parameter


| Parameter | Fronius Verto 33.3 | SolarEdge SE33.3K (K33.3SE) with DC Safety Unit (optional) |
| --- | --- | --- |
| Rated AC power | 33.30 kW | 33.30 kW |
| Max AC power | 33.30 kW | 33.30 kW |
| Grid connection | 3-phase | 3-phase |
| Nominal AC voltage | 400 V | 480 V |
| Max AC current | 50.5 A | 40.0 A |
| Max PV power | 50.00 kW | 50.00 kW |
| DC/AC ratio | 1.50 | 1.50 |
| Max DC voltage | 1000 V | 1000 V |
| MPPT voltage range | 150-870 V | 680-1000 V |
| Start voltage | 150 V | - |
| MPP trackers | 4 | - |
| Strings per tracker | 2 | - |
| Max input current per tracker | 28.0 A | 40.0 A |
| European efficiency | 97.8 % | 98.0 % |
| Max efficiency | 98.0 % | 98.1 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 41.8 kg | 48.0 kg |
| Weight per kW | 1.3 kg/kW | 1.4 kg/kW |
| Dimensions | 865x574x279 mm | 775x315x260 mm |
| Ingress protection | IP66 | IP65 |
| Cooling | forced-air | forced-air |
| Noise | 56 dB | 55 dB |
| 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 | - | 20 yrs |


## Related comparisons

- [Fronius Verto 33.3 vs SolarEdge SE33.3K](https://comparepv.com/compare-inverters/fronius-international-fronius-verto-33-3/solaredge-se33-3k) - 9 differences, the largest is max pv power
- [Fronius Verto 33.3 vs SolarEdge SE33.3K (K33.3SE) - Three Phase Inverter for 277/480V Grid](https://comparepv.com/compare-inverters/fronius-international-fronius-verto-33-3/solaredge-solaredge-se33-3k-k33-3se-three-phase-inverter-for-277-480v-grid) - 8 differences, the largest is max input current per tracker
- [Fronius Verto 33.3 vs SolarEdge SE33.3KUS (KUS33.3SE)](https://comparepv.com/compare-inverters/fronius-international-fronius-verto-33-3/solaredge-se33-3kus-kus33-3se) - 7 differences, the largest is max pv power


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Source: https://comparepv.com/compare-inverters/fronius-international-fronius-verto-33-3/solaredge-solaredge-se33-3k-k33-3se-with-dc-safety-unit-optional

Not in this file, on the page: a written summary generated on request.