Inverter – FRONIUS – Verto 25.0 400 SPD 1+2
Product details
Verto
Verto is a series of three-phase photovoltaic inverters for new and expanded PV installations. Four maximum power point (MPP) trackers make it easier to manage complex installations, while the Dynamic Peak Manager algorithm optimizes yields under shading. Integrated protection features and open interfaces support safe operation and the use of surplus energy for charging electric vehicles or heating.
Key advantages of Verto
- Rated AC power 25–33.3 kW depending on the model, with a maximum efficiency of 97.47–98.03%.
- Four MPP trackers, two DC connections per system and a maximum usable current of 28 A per MPPT input. The DC input voltage range is 150–1000 V.
- Dynamic Peak Manager – an integrated algorithm that optimizes energy yields even when the installation is shaded.
- Built-in protection include Arc Guard arc fault detection and interruption, DC/AC surge protection, and leakage current monitoring.
- Open interfaces and WiFi and Ethernet communication enable integration with Fronius Wattpilot and Fronius Ohmpilot, and also facilitate the connection of heat pumps and smart home systems.
- Protection rating IP66 and the option of installation both indoors and outdoors. The ambient temperature range is −40 to +60 °C.
Who is this a good choice for?
Verto is designed for small business owners, farm owners and residents of multi-family homes building or expanding a PV system. Four MPP trackers and shading management meet the needs of complex installations, while integration with vehicle charging and heating control devices allows surplus energy to be used on site.
| Parameter | Verto 25.0 | Verto 27.0 | Verto 30.0 | Verto 33.3 |
|---|---|---|---|---|
| DC input data | ||||
| Number of MPP trackers | 4 | |||
| Number of DC connections per MPPT | 2 | |||
| Maximum usable input current per MPPT (A) | 28 | |||
| Maximum usable input current per string (A) | 28 | |||
| Maximum PV generator short-circuit current per MPPT (A) | 50 | |||
| Maximum PV generator short-circuit current per string (A) | 50 | |||
| Maximum PV generator short-circuit current per inverter (A) | 150 | |||
| Rated input voltage (V) | 600 | |||
| DC input voltage range (V) | 150–1000 | |||
| Start-up voltage (V) | 150 | |||
| Usable MPP voltage range (V) | 150–870 | |||
| MPP voltage range at rated power (V) | 300–870 | 330–870 | 360–870 | 400–870 |
| Maximum usable DC power per MPPT (Wpeak) | 13,000 | |||
| Maximum PV array power per MPPT (Wpeak) | 20,000 | |||
| Maximum PV generator power per inverter (Wpeak) | 37,500 | 40,500 | 45,000 | 50,000 |
| AC output data | ||||
| Rated AC power (W) | 25,000 | 27,000 | 29,990 | 33,300 |
| Maximum output power (VA) | 25,000 | 27,000 | 29,990 | 33,300 |
| AC output current at 380 V (A) | 37,9 | 40,9 | 45,5 | 50,5 |
| AC output current at 400 V (A) | 36,2 | 39,1 | 43,5 | 48,3 |
| AC output current at 440 V (A) | 32,8 | 35,4 | 39,4 | 43,7 |
| AC output current at 480 V (A) | 30,1 | 32,5 | 36,1 | 40,1 |
| Grid connection (V) | 3~ (N)PE 380/220; 3~ (N)PE 400/230; 3~ (N)PE 440/254; 3~ (N)PE 480/274 | 3~ (N)PE 380/220; 3~ (N)PE 400/230; 3~ (N)PE 440/254; 3~ (N)PE 480/275 | 3~ (N)PE 380/220; 3~ (N)PE 400/230; 3~ (N)PE 440/254; 3~ (N)PE 480/276 | 3~ (N)PE 380/220; 3~ (N)PE 400/230; 3~ (N)PE 440/254; 3~ (N)PE 480/277 |
| Rated frequency and frequency range (Hz) | 50/60 (45–65) | |||
| Total harmonic distortion (%) | < 3 | < 1 | ||
| Power factor | 0–1 ind./cap. | |||
| Efficiency | ||||
| Maximum efficiency (%) | 97,47 | 98,03 | 98,02 | 97,98 |
| European efficiency (%) | 97,36 | 97,79 | 97,80 | 97,76 |
| MPP efficiency (%) | > 99,9 | |||
| Dimensions and weight | ||||
| Dimensions (height × width × depth) (mm) | 865 x 574 x 279 | |||
| Inverter weight (kg) | 41,75 | |||
| Operating conditions | ||||
| Degree of protection | IP 66 | |||
| Protection class | 1 | |||
| DC/AC overvoltage category | 2/3 | |||
| Nighttime power consumption (W) | < 16 | |||
| Cooling | Active air cooling | |||
| Installation | Indoor and outdoor installation | |||
| Ambient temperature range (°C) | from -40 to +60 | |||
| Permissible air humidity (%) | 0–100 | |||
| Noise emission (dB(A)) | < 54,6 | |||
| Maximum altitude above sea level (m) | 3000 / 4000 (unrestricted / restricted voltage range) | |||
| Connection technology | ||||
| AC | ||||
| Conductor cross-section (mm²) | 4–35 | |||
| AC conductor material | Al and Cu | |||
| Cable gland | AC: M32 (Ø12–24.5 mm) Prepared for Option 1: M50 cable gland (Ø10–35 mm) Option 2: 1.5″ conduit connection PE and data transmission: 2 × M32 (3ר4.9–5.5 mm + 3ר6.7–8.5 mm) | |||
| DC | ||||
| DC connection terminals | Direct DC connection Stäubli Multi Contact MC4 | |||
| DC conductor material | Al and Cu | |||
| Protection | ||||
| DC insulation | Integrated | |||
| DC disconnector | Integrated | |||
| Residual current monitoring unit (RCMU) | Integrated | |||
| Electric arc detection and interruption – Arc Guard | Integrated | |||
| Reverse polarity protection | Integrated | |||
| DC/AC surge protection | Type 1+2 or type 2 | |||
| Interfaces | ||||
| Wi-Fi | Fronius Solar.web, Modbus TCP, JSON, 802.11b/g | |||
| Ethernet LAN RJ45 | 10/100 Mbit; max. 100 m Fronius Solar.web, Modbus TCP, JSON | |||
| Wired shutdown (WSD) | Integrated | |||
| 2 × RS485 | Modbus RTU SunSpec (third-party) / Fronius Smart Meter | |||
| 6 digital inputs | Programmable remote control receiver interface, energy management, load management | |||
| 6 digital inputs/outputs | ||||
| Communication card and web server | Integrated | |||
| Certificates | ||||
| Certifications held and standards met | IEC62109-1/-2; VDE-AR-N 4105:2018; R25; UNE 217002:2020; IEC 62116; EN 50549-1/-2; AS/NZS 4777.2:2020+A1; IEC 63027:2023; CEI 0-21; CEI 0-16 | |||
A single string can handle the full usable MPPT current; the maximum current per MPPT is limited to 28 A. Short-circuit currents: Isc pv = Isc max ≥ Isc (STC) × 1.25 in accordance with IEC 60364-7-712, NEC 2020 and AS/NZS 5033:2021.

