Inverter – FRONIUS – Verto 33.3 Plus – hybrid – HV
Product details
Verto Plus 33.3
Verto Plus 33.3 is a three-phase, transformerless photovoltaic inverter with a rated power of 33.3 kW, equipped with a DC battery input. Three MPPT controllers support a photovoltaic array with a maximum total power of 50 kWp. The device also offers Full Backup mode with an AC-Boost function for short-term power increases.
Key benefits of Verto Plus 33.3
- Rated power 33.3 kW and a three-phase grid connection.
- 3 MPPT controllers with an MPP voltage range of 410–870 VDC and support for a PV array with a maximum total power of 50 kWp.
- Battery DC input: voltage 150–700 V, maximum current 50 A and maximum power 35 kW.
- Full backup power supply Full Backup: rated power of 33.3 kW and 50 kVA with AC-Boost function for 5–10 s.
- Fast switching: switching time below 20 ms in fast switching mode; standard switching time below 35 s.
- IP66 protection rating and permissible ambient temperature from −40 to +60°C.
Who is this a good choice for?
Verto Plus 33.3 is designed for owners of photovoltaic systems requiring a three-phase inverter with a power rating of 33.3 kW. For users planning to connect a battery, it offers a DC input with a maximum power of 35 kW, and for those needing backup power — Full Backup mode with the AC-Boost function.
| Parameter | Value |
|---|---|
| DC input data | |
| Maximum input voltage at 1000 W/m² and -10°C under open-circuit conditions (V DC) | 1000 |
| Start-up voltage (V DC) | 150 |
| MPP voltage range (V DC) | 410–870 |
| Number of MPPT controllers | 3 |
| Maximum input current PV1 / PV2 / PV3 (A) | 28 / 28 / 28 |
| Maximum input current per string (A) | 28 |
| Total maximum short-circuit current (A) | 150 |
| Maximum short-circuit current PV1 / PV2 / PV3 (A) | 50 / 50 / 50 |
| Maximum short-circuit current per string (A) | 50 |
| Total maximum PV array power (kWp) | 50 |
| Maximum PV array power for PV1 / PV2 / PV3 (kWp) | 20 / 20 / 20 |
| DC overvoltage category | 2 |
| Maximum inverter reverse current (A) | 0 |
| Maximum photovoltaic generator capacitance to ground (nF) | 6 660 |
| Insulation and residual current monitoring | |
| Factory-set insulation resistance limit between the photovoltaic generator and ground (kΩ) | 34 |
| Insulation resistance monitoring setting range (kΩ) | 34–10 000 |
| Factory-set limits and detection times for sudden residual current (mA / ms) | 30 / 300; 60 / 150; 90 / 40 |
| Factory-set limit value and detection time for continuous residual current (mA / ms) | 300 / 300 |
| Continuous residual current detection setting range (mA) | 30-1000 |
| Factory-set interval for periodic insulation resistance checks (h) | 24 |
| Setting range for repeated cyclic insulation resistance checks | -- |
| Battery DC input data | |
| Maximum voltage (V) | 700 |
| Minimum voltage (V) | 150 |
| Maximum current (A) | 50 |
| Maximum power (kW) | 35 |
| Number of DC inputs | 1 |
| AC output data | |
| Grid voltage range (V AC) | 176–528 |
| Rated grid voltage (V AC) | 220 / 230; 253 / 257 |
| Rated power (kW) | 33,3 |
| Maximum usable inverter DC power (kW) | 39 |
| Rated apparent power (kVA) | 33,3 |
| Rated frequency (Hz) | 50/60 ¹) |
| Maximum output current per phase (A) | 53,7 |
| Initial symmetrical short-circuit current per phase IK″ (A) | 53,7 |
| Power factor cos φ | 0–1 individuals/container |
| Grid connection (V AC) | 3~ (N)PE 380 / 220; 3~ (N)PE 400 / 230; 3~ (N)PE 440 / 253; 3~ (N)PE 480 / 277 |
| Earthing systems | TT (permitted if UN_PE <30 V); TN-S(permitted); TN-C-S(permitted); IT(not permitted) |
| Maximum output power (kW) | 33,3 |
| Rated output current per phase (A) | 50,5 / 48,3 / 43,7 / 40,1 |
| Total harmonic distortion (%) | <3% |
| AC overvoltage category | 3 |
| Peak inrush current (A) | 24,72 |
| RMS inrush current (A) | 6,82 |
| Inrush current duration (ms) | 1,99 |
| Maximum output short-circuit current and duration (A / ms) | 53,74 / 13,51 |
| AC output data in full backup power mode | |
| Maximum output current per phase (A) | 53,7 |
| Output current with 3 phases in AC-Boost mode for 5–10 s (A) | 72,5 |
| Output current with 1 phase in AC-Boost mode for 5–10 s (A) | 72,5 |
| Rated output power (kW) | 33,3 |
| Apparent power in AC-Boost mode for 5–10 s (kVA) | 50 |
| Rated output current per phase (A) | 53,7 |
| Rated grid voltage (V AC) | 3~ (N)PE 380 / 220; 3~ (N)PE 400 / 230; 3~ (N)PE 440 / 253; 3~ (N)PE 480 / 277 |
| Rated frequency (Hz) | 50/60 ¹) |
| Switching time (s) | <35 |
| Switching time in fast switching mode (ms) | <20 |
| Power factor cos φ | 0–1 individuals/container |
| Efficiency | |
| Nighttime standby losses (W) | 16 |
| European efficiency at 400/600/870 V DC (%) | 97,42 / 97,95 / 97,56 |
| Maximum efficiency (%) | 97,72 |
| Operating conditions and protection | |
| Protection class | 1 |
| Device EMC emission class | B |
| Pollution degree | 3 |
| Permissible ambient temperature (°C) | - 40 – +60°C |
| Permissible storage temperature (°C) | -40 – +70°C |
| Relative humidity (%) | 0-100% |
| Sound pressure level (dB(A)) | 56.7 dB(A) (ref. 20 µPA) |
| Degree of protection | IP66 |
| Dimensions and weight | |
| Dimensions: height × width × depth (mm) | 865 × 574 × 279 |
| Inverter weight (kg) | 40,1 |
| General information | |
| Inverter topology | non-isolated, transformerless |

