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PV On-Grid String Inverter
Maximize the energy yield and accelerate the return on investment (ROI) of your solar projects with the DT Solar series. Designed specifically for modern commercial, industrial (C&I), and large-scale residential installations, this high-efficiency grid-tied inverter balances robust engineering with intelligent energy management to lower the levelized cost of energy (LCOE).
The DT Solar PV On-Grid String Inverter serves as the heavy-duty power house for grid-tied solar systems. Built around an advanced multi-MPPT topology, it ensures maximum power generation even on complex commercial rooftops with varying orientations or shading challenges.
By utilizing a high power density string inverter architecture, this system simplifies installation, eliminates the single point of failure common in central inverters, and dramatically reduces initial balance-of-system (BOS) costs.
Key Performance Features
- Industry-Leading Efficiency: This inverter utilizes advanced power conversion topology to achieve a peak efficiency of up to 98.7%, ensuring maximum energy harvest from your PV array.
- High Input Capacity: Engineered to handle a maximum PV input voltage of up to 1100V, providing greater flexibility in system design and larger string capacities.
- Optimal DC/AC Ratio: Supports a DC oversizing ratio of up to 1.5, maximizing the AC output during lower irradiance periods and significantly improving the overall levelized cost of energy (LCOE).
- Compact High-Power Density: Delivers high power output in a smaller and lighter footprint, drastically reducing logistical costs and simplifying the installation process.
Products Description
| Input(DC) | |
| Max.DC Voltage | 1100V |
| Max.Input Current Per MPPT | 40A |
| Max.Short-circuit Current Per MPPT | 60A |
| Start Voltage | 350V |
| MPPT Voltage Range | 200-1000V |
| Nominal Voltage | 650V |
| Number of MPPT | 8 |
| Strings Per MPPT | 2 |
| Output(AC) | |
| Nominal AC Output Power | 125kW |
| Max. AC Apparent Power | 125kVA |
| Nominal AC Voltage | 230V/400V,3W+PE,3W+N+PE |
| AC Grid Frequency Range | 50/60Hz±5Hz |
| Max. Output Current | 181.2A |
| Power Factor (cosΦ) | 0.8leading-0.8lagging |
| THDi | < 3% ( Nominal Power ) |
| Efficiency | |
| Max. Efficiency | 98.70% |
| Euro Efficiency | 98.50% |
| Protection Devices | |
| DC Switch | Yes |
| Anti-islanding Protection | Yes |
| Output Over Current Protection | Yes |
| DC Reverse Polarity Protection | Yes |
| String Fault Detection | Optional |
| DC/AC Surge Protection | DC Type II;AC Type II |
| AC Short Circuit Protection | Yes |
| Insulation Detection | Yes |
| Residual Current Monitoring | Yes |
| General Specifications | |
| Dimensions W x H x D | 965mm*700mm*355mm |
| Weight | 85kg |
| Operating Temperature Range | -30~60°C |
| Cooling Type | Fan Cooling |
| Max. Operation Altitude | 5,000 m (>4,000 mDerating) |
| Max. Operating Humidity | 0~100% |
| IP Class | IP66 |
| Noise (dB) | ≤75dB |
| Topology | Transformer less |
| Communication | RS485/PLC/WIFI/4G |
for Project Yield and System ROI
Flattened Generation Profile (Peak Shaving): In real-world conditions, solar arrays rarely operate at STC peak ratings due to dust, cloud cover, and high ambient temperatures. By oversizing the DC array to a 1.5 ratio, the inverter reaches its full AC capacity much earlier in the morning and maintains it until late afternoon, delivering a more stable and high-yield output curve throughout the day.
Superior Low-Irradiance Performance: During early morning, late evening, or heavily overcast winter periods, a standard 1:1 configured system often operates below its efficient generation threshold. The 1.5 DC oversizing forces the inverter into its optimal operating voltage range much faster, unlocking power generation that would otherwise be lost.
Reduced Balance of System (BOS) Costs: By packing more DC power into a single AC unit, developers can maximize the energy yield of a specific commercial roof or land parcel without moving up to a larger, more expensive inverter class. This saves significant capital on AC cabling, distribution panels, and labor costs.
FAQ
Q: What is the maximum DC/AC overloading ratio supported by this inverter?
A: The inverter supports a DC/AC ratio of up to 1.5. This allows you to oversize the DC array by up to 50% to maximize energy yield during low-irradiance periods and optimize the overall levelized cost of energy (LCOE).
Q: How does the inverter handle shading or multi-oriented roof configurations?
A: The inverter is designed with a multi-MPPT architecture. Each MPPT features an ultra-wide operating voltage range (160V - 1000V) and independent tracking loops, ensuring that shading, dust accumulation, or complex module orientations on one string will not impact the power generation of the remaining strings.
Q: How does the cooling system perform under high ambient operating temperatures?
A: The inverter uses an intelligent forced-air cooling system equipped with fully sealed, IP67-rated variable-speed fans. The cooling logic continuously adjusts based on internal temperatures and real-world loading, allowing the unit to maintain peak efficiency up to 98.7% without thermal derating in ambient environments up to 45°C.
Q: What grid-compliance certifications does this string inverter hold for international deployment?
A: Our PV On-Grid String Inverters are fully certified under leading global safety and grid-connection frameworks. They carry CE and TUV certifications and conform to safety standards IEC 62109-1 and IEC 62109-2. For regional grid integration, they comply with VDE-AR-N 4105, EN 50549-1, G99, CEI 0-21, and AS/NZS 4777.2.
Q: Does the inverter support reactive power control and power quality management?
A: Yes, the unit features full reactive power capability with an adjustable power factor range from 0.8 leading to 0.8 lagging. It can dynamically respond to grid utility commands for active/reactive power regulation, helping commercial facilities stabilize local grid voltage and avoid power factor penalties.
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