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Fronius Verto 33.3 Plus SPD 1+2 — is the most powerful three-phase hybrid inverter in the Verto Plus line with a rated power of 33.3 kW. The device is designed for commercial facilities, large households, agricultural enterprises and multi-apartment buildings. It combines high performance with maximum flexibility for both building new photovoltaic systems and expanding existing ones. Thanks to the integrated three-phase full backup power function (Full Backup) and support for modern high-voltage batteries, this inverter provides reliable power supply even for large loads in critical situations.
Technical decoding of the Verto 33.3 Plus SPD 1+2 model
The inverter marking reflects its key architectural and functional features:
- Verto Plus: New adaptive hybrid platform from Fronius with integrated battery support and open interfaces for energy management.
- 33.3: Indicator of the rated AC output power, which is 33,300 W (33.3 kW).
- 3 MPPT: Presence of three independent maximum power point trackers for complex roofs and flexible design.
- SPD 1+2: Factory equipment with an integrated surge protection device for DC current (Type 1+2).
5 key technical advantages of Fronius Verto 33.3 Plus
1. Full Backup power supply
In combination with a battery system, the inverter provides powerful full three-phase backup power for the entire facility. It is capable of supporting the operation of even such large consumers as heat pumps, powerful cooling systems, fans or industrial shredders, with a rated backup power of 33,300 VA.
2. Maximum flexibility (3 MPPT at 28 A)
The device is equipped with three high-current MPP trackers, each supporting a maximum useful input current of up to 28 A. Thanks to the integrated Dynamic Peak Manager algorithm, the inverter ensures optimal energy generation even under partial shading conditions.
3. Highest level of safety with integrated SPD 1+2
This modification includes a built-in surge protection device on the DC side of type 1+2 and AC type 2. Together with the Fronius Arc Guard electrical arc detection system (AFCI), this guarantees the highest safety standards in the basic configuration without the need for additional components.
4. High DC input power and overload capacity
The inverter allows you to connect solar arrays with a maximum photovoltaic generator power of up to 50,000 W-peak. This significant DC current overload allows you to significantly increase energy generation efficiency in the morning and evening hours, as well as on cloudy days.
5. Compatibility with modern batteries
As a full hybrid, Verto 33.3 Plus is compatible with modern high-voltage battery systems such as Fronius Reserva and BYD Battery-Box Premium (HVM, HVS models).
Detailed technical specifications (Model 33.3 Plus)
Input data (DC — Solar panels)
- Max. photovoltaic generator power to inverter: 50,000 W-peak.
- Max. useful DC power (Inverter): 39,000 W.
- Number of MPP trackers: 3.
- Input voltage range (Udc min - Udc max): 150 – 1,000 V.
- Rated input voltage (Udc,r): 600 V.
- Max. useful input current per MPPT: 28 A.
- Max. short-circuit current per MPPT (Isc pv): 50 A.
- MPP voltage range (at full power): 410 – 870 V.
Battery connection parameters
- Number of battery inputs: 1.
- Max. charge/discharge current: 50 A.
- Battery input voltage range: 150 – 700 V.
- Max. charging power (DC): 35,000 W.
- Max. discharging power (DC): 33,300 W.
- Connection technology: Stäubli MC4 DC connectors.
Output data (AC — Network)
- Rated power (Pac r): 33,300 W.
- Max. output power / rated apparent power: 33,300 VA.
- Rated output current (at 400 V): 48.3 A.
- Network connection: 3-(N)PE 400/230 V or 3-(N)PE 380/220 V.
- Total harmonic distortion (THD): < 1 %.
- Rated Full Backup power: 33,300 VA.
General parameters and safety
- Maximum efficiency: 98.15 %.
- European efficiency (EU): 97.95 %.
- Dimensions (H×W×D): 865 × 574 × 279 mm.
- Weight (inverter): 43 kg.
- Enclosure protection class: IP66.
- Cooling: Regulated air cooling.
- Surge protection: DC Type 1+2 / AC Type 2.
- Country of manufacture: Austria.
Intelligent monitoring and interfaces
The inverter is equipped with a built-in data logger and web server for complete system control. Connection is made through integrated WLAN or Ethernet LAN RJ45 modules. The inverter integrates seamlessly with the Fronius Solar.web monitoring platform. Open interfaces (Modbus TCP SunSpec, JSON) allow convenient integration of Fronius Wattpilot charging stations and Fronius Ohmpilot consumption regulators.
Service, design and warranty from "Total-Energo"
As an official Fronius partner in Ukraine, "Total-Energo" provides professional support for business and private household projects:
- Official distribution: We supply only genuine Fronius equipment directly from Austria.
- Technical engineering: Our specialists will help you calculate the optimal solar string configuration for three independent trackers, taking into account the high input power (50 kW-peak) of this model.
- Full Backup integration: Design and configuration of the three-phase backup power system and connection of high-voltage batteries.
- Warranty support: As a certified partner, we provide a full range of warranty and service support for Fronius equipment in Ukraine.