Products - Solar Inverters - Delta EMEA

DP225U / DP350U

Maximum power with Delta's new 1500 VDC solar inverters for large solar power plants

With a voltage of 1500 VDC / 800 VAC and an output power of 225 kW or 350 kW, these inverters are the perfect choice for large-scale utility installations. In developing the DP225U / DP350U models, Delta drew on its extensive experience with string inverters used in PV systems with capacities of several hundred megawatts.

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Product Introduction

Product Highlights
  • Future-Proof Performance for High-Current Modules - Supports up to 40A per MPPT, fully compatible with next-generation M12 modules and high-current PV systems.
  • Consistent Output in Demanding Environments - Delivers 225 kVA / 350 kVA at 40°C and 200 kVA / 300 kVA at 50°C, ensuring reliable power even in high-temperature conditions.
  • Maximum Energy Harvest with Advanced MPPT - Offers up to 44 kW per MPPT for superior efficiency in large-scale systems. Maintains strong performance even under partial shading.
  • Smart Monitoring for Long-Term Reliability - Integrated AC terminal temperature sensors help prevent overheating and ensure safer, more efficient operation over time.
  • Efficient Troubleshooting with Built-In Diagnostics - An internal waveform recorder accelerates fault detection and simplifies coordination with grid operators.
  • Flexible and Economical Design Choices - Optional AC terminal lugs enable quick, cost-effective replacements—ideal for streamlined installation and maintenance.
Feature Highlights

Effortless Cable Management with Maximum Flexibility

The separate AC wiring box with a removable cable entry makes cable handling effortless and flexible. It is compatible with aluminum and copper cables up to 300 mm² for the DP225U model and up to 400 mm² for the DP350U model. Additionally, it offers a specialized cable gland for single-conductor PE cables and an optional cable entry for single-conductor AC cables, ensuring maximum adaptability.

Maximized Energy Yield with Precision MPP Tracking and Safe DC Disconnection

Our inverters are equipped with 8 or 12 MPP trackers, each optimized for 2 module strings. This technology ensures maximum energy yield and adaptability to a wide range of installation conditions. For added safety and convenience, the automatic disconnection via 3 or 4 DC disconnect switches allows for reliable and efficient shutdown. The package also includes a matching number of high-quality Amphenol Pro PV connectors, ensuring quick and secure installation.

Seamless communication & Flexible Integration for Smart Energy Systems

The DP225U/DP350U inverters feature an integrated PLC interface for easy powerline communication with Delta's PLC100 converter. This technology utilizes existing power lines, enhancing reliability. Additionally, they offer a hot-pluggable communication card with 2 RS485 interfaces, 6 digital inputs, and 2 potential-free contacts, allowing for flexible integration into monitoring and control systems. These versatile communication options make the inverters powerful solutions for modern energy installations.

Advanced Protection & Smart Features for Optimal PV Performance

The DP225U/DP350U inverters offer essential protection features such as anti-PID, reverse polarity protection, and arc detection. In addition, the I-V curve scanning with open protocol flexibility enables seamless integration with third-party monitoring and control systems. The inverters also stand out with advanced features, including a powerful PLC communication interface for efficient data transmission, a precise waveform recorder for detailed insights into power quality, and an enhanced MPP tracker function to optimize energy yield. This combination of protective mechanisms and innovative features makes the DP225U/DP350U inverters an excellent choice for demanding photovoltaic installations.
Applications

Utility-scale





 
Technical Data

A complete overview of the technical data can be found in the data sheet.

 
Input (DC) DP225U DP350U
Maximum input power (per MPP tracker/total) 44 / 230 kW 44 / 360 kW
Max. input voltage 1500 VDC
Operating voltage range 500 to 1500 VDC
MPP voltage range 500 to 1500 VDC
MPP voltage range with maximum power 850 to 1350 VDC
Nominal voltage 1150 VDC
Maximum current (per MPP tracker/total) 40A / 320A 40A / 480A
Maximum short-circuit current ISC 40 A per MPP tracker
Max. number of MPP-Tracker 8 12
Max. number of module strings per MPP tracker 2
String fuses not needed
DC surge protection devices Type 2 (EN 50539-11), not replaceable
Output (AC) DP225U DP350U
Maximum apparent power 225 kVA 350 kVA
Maximum active power 225 kW 350 kW
Nominal apparent power 225 kVA 350 kVA
Voltage range 800 V -20% / +15%; 3 ph. + PE (Y)
Maximum current 165 A 253 A
Frequency range 50/60 Hz ± 5 Hz
Power factor adjustment range 0.8 kap to 0.8 ind
Total harmonic distortion (THD) < 3% at nominal apparent power
Consumption in night mode < 8 W
AC surge protection devices Typ 2 (EN 61463-11), not replaceable
General Specifications DP225U DP350U
Peak efficiency 99.0%
EU efficiency 98.8%
Operating temperature range -30 to +60 °C
Temperature range without power derating -30 to +50 °C
Storage temperature range -25 to +60 °C
Relative humidity 0 to 100%, non-condensing
Max. operating height 4000m (above sea level)
Topology Without transformer
Standard warranty 5 years (warranty extension available upon request)
Mechanical Design DP225U DP350U
Dimensions (H x W x D) 765 x 1220 x 397 mm 925 x 1210 x 370 mm
Weight 122 kg 152 kg
Cooling Replaceable fan module
Mounting options Suspended
Disconnectors 3 automatic DC disconnectors 4 automatic DC disconnectors
Connection type AC side Single raw terminal bolts Optional double raw terminal bolts
Cable specification AC side Cu / Al 70 to 300 mm2 Cu / Al 120 to 400 mm2
Connection type DC side Amphenol H4 Pro
Communication DP225U DP350U
Communication interfaces 2 x RS485, 2 x dry contacts, 1 x external power-off, 6 x digital inputs, Bluetooth®, PLC (PLC100 converter required)
Data visualization DeltaSolar app, MyDeltaSolar Cloud
Display of operating status 3 LEDs
Safety / Standards DP225U DP350U
Degree of protection IP66
Safety class I
Configurable trip parameters Yes
Insulation monitoring Yes
Overload behavior Current limit, power limit
Anti-islanding protection / grid regulation EN 50549-1, EN 50549-2, EN 50549-10, VDE-AR-N 4110/4120/4130
EMC EN 61000-6-2, EN 61000-6-3, EN 61000-3-11, EN 61000-3-12
Safety IEC 62109-1/-2; CE compliance



 
Related products

  1. PLC100 converter
  2. DeltaSolar app
  3. MyDeltaSolar Cloud
  4. PV Planner

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The DP225U solar inverter.

The DP225U inverter has 8 MPP trackers for 2 module strings each, i.e. 16 module strings in total. It is also equipped with a high-performance communication interface (RS485), which enables reliable and flexible data transmission.

The DP350U solar inverter.

The DP350U inverter has 12 MPP trackers for 2 module strings each, i.e. 24 module strings in total. It is also equipped with a high-performance communication interface (RS485), which enables reliable and flexible data transmission.