REFUsol 20K/33K
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REFUsol 20K … 33K-2T New flexibility meets compatibility SUITABLE FOR REPOWERING APPLICATIONS Lightweight design Compatible with legacy REFUsol inverters The completely new range of REFUsol 20K…33K-2T inverter is developed for a maximum of flexibility in commercial and industrial PV systems. With two MPP trackers, each system design can be realized, including different orientations and tilts. Compact dimensions paired with a high power density per weight gives more installation location flexibility – on the rooftop or on ground mounted systems. With two power classes of 20 kVA and 33 kVA, it fits to any mid-size project. The RS485 and the Ethernet interface can be connected on the same RS485 Bus or Ethernet network for Park Control applications without the need for reconfiguration. Therefore, the devices are also best suited for repowering of existing PV plants equipped with REFUsol inverters. Four digital inputs support the EEG feed-in management (i.e. 0 %, 30 %, 60 %, 100 %). The REFUlog monitoring portal comes for free with each inverter during the warranty period of 5 years. The Ethernet connection for easy integration into the local network comes as standard, an optional Wifi-stick plug is avai

TECHNICAL DATA DC DATA Max. recommended PV power (kWp) Max. input voltage (V) Operating input voltage range (V) Start-up input voltage (V) Rated input voltage (V) Number of independent MPPT Number of DC inputs per MPPT Max. power per MPPT Input (kW) Max. short circuit current per MPPT (A) Rated power MPPT voltage range (V) AC DATA Rated power (kW) Nominal grid voltage (V) Nominal grid frequency (Hz) Total harmonic distortion (THD) (%) Adjustable power factor range ring cable lugs (M6) Weighted european efficiency (EU/CEC) (%) MPPT efficiency (%) Feed-in start power (W) EFFICIENCY DIAGRAM...

Safety protection Anti-islanding, DC reverse polarity, Overtemperature, Overvoltage, Overcurrent, RCMU, ground fault protection String monitoring each MPPT String fuses Protection class / overvoltage category Class I / DC and AC: Type III standard External environment pollution degree Max. inverter back-feed current to the array (A) Output short circuit current (A) Output inrush current (A) COMMUNICATION Digital inputs GENERAL DATA Ambient temperature (°C) Allowable rel. air humidity range (%) Max. operating latitude (m above sea level) Noise level (dBA) Cooling Dimension H × W × D (mm)...

SINGLE LINE DIAGRAM Only 33K: current measurement, back/current diodes For 20K: 1C and 2C input is not used Anti-condensation valve DC switch DC positive poles connectors Etherne t / WiFi / GPRS interface RS 485 input cable gland / dry contact AC cable gland Heatsink / fans (only for 33K) DC negative poles connectors PERFORMANCE DIAGRAMS No responsibility is taken for the correctness of this information. Subject to modification. REFU Elektronik GmbH | Marktstraße 185 | 72793 Pfullingen | Germany | Tel. +49 7121 4332-0 | Fax +49 7121 4332-140 | info@refu.com | www.refu.com Output Power vs....