SANDI 20kW grid solar power inverter with isolation transformer
Summarize
PV grid-connected power system includes PV modules, grid-connected inverter, and meter and power switchboard. The PV modules convert the solar energy to the DC power, then the grid-connected inverter the DC power to the sine wave AC power which has the same frequency and phase with the grid voltage, and then the AC power FEED-in the grid partly and the other power supply the local loads, it can save any surplus electricity.
Features
◆Using U.S. TI' DSP chip to control.
◆using Japan's Mitsubishi IGBT modules, to enhance system reliability.
◆Maximum Power Point Tracking technology（MPPT),MPPT Max. Efficiency>99%.
◆Active and passive two kinds of power brown-out detection, to achieve control of anti-island.
◆with Wide DC input voltage range.
◆EMC priority, Strong anti-interference ability.
◆circuit frame compact, max. Efficiency≥95%.
◆pure sine wave output, automatically synchronized with the grid tracking, power factor close to 1.
◆Fed into the grid mode selectable low frequency transformer or non isolated transformer.
◆Inverter current double closed-loop control, low current harmonic content , pollution-free and non-shock to grid.
◆Perfect protection and alarm functions.
◆big-screen English LCD, perfect display, interface-friendly.
◆A variety of communication interfaces, host computer monitoring, remote data acquisition and monitoring.
| Technical parameters： |
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Type
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SDS-20KW
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Isolation
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Low frequency transformer isolation
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Max. DC input power
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22KWp
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Max. DC input voltage
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800Vdc
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Max.PV voltage range（MPPT）
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450Vdc～780Vdc @595Vdc
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Recommended number of PV module voltage @ string
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about 35V @ 17 string
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Battery board Joint type
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connection terminal
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Max. Input current
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49A
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Nominal AC output power
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20KW
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Max. AC output power
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22KW
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THD of AC current
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<3%（nominal power）
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Power factor
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>0.99
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Max. Efficiency
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95%
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Euro efficiency
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93%
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Nominal AC voltage
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310VAC～450VAC
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Nominal AC frequency
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47.5Hz~51.5Hz
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Internal power consumption an night
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<100W
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Automatically put into operation conditions
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When the DC input and power grids meet to the requirements, the inverters automated operation
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Automatic restart time
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5min(time adjustable)
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Protection
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Possess the protecting function of polarity connecting contrary, short circuit, island effects, over heat, over land
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Comm. interfaces
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RS485/RS232/GPRS/Ethernet
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Operating Temp.
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－25℃～＋55℃
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Relative humidity
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0～95%，no condensing
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Altitude(m)
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≤2000meters(Over 2000 meters to reduce the using amount)
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Cooling method
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Controlled forced-air cool
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Noise
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≤60dB
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Protection degree
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IP20（indoor）
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Size（W*L*H mm）
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800*600*2060
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Weight(kg)
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350
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