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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Sandi
  • Model Number: SDP-20KW
  • Specification: Normal
  • Application: Home
  • Output Voltage (V): 220/230/240/380/400/415VAC optional
  • Load Power (W): 20KW
  • Work Time (h): 24h
  • Max efficiency: 98%
  • Display: 3.5 inches Color LCD touch screen display
  • AC output waveform: Pure sine wave
  • Starting Mode: Step down voltage start and Variable frequency start
  • Module: IPM intelligent module from Japanese Mitsubishi
  • Service life: 15 years or more
  • AC output voltage,frequency,phases: single/two/three phase,220//230/240/380/400/415Vac optional,50/60Hz
  • Wide input voltage range: 100-900Vdc
  • With low frequency transformer: more safe and reliable
  • Warrenty: 2 years, supply technology support all the time

Packaging & Delivery

Packaging Details SANDI standard honeycomb carton packing with pallet
Delivery Time 8-10 working days


Product Description

PV Off Grid Solar Power System including:                                                                                        solar panel array, solar charge controller, storage battery, Off grid inverter, etc.  

In the sunshine, the solar panel convert the solar energy to DC power and charge the battery group

by the charge controller. Then the off grid inverter convert the DC power into AC power for power 

supply the AC load.

nThe newest Double Start Mode low frequency off grid inverter features:

Our company combine user’ actual usage, specially designed this new low frequency off grid inverter, 

which is characterized by stable and reliable performance, set up parameters flexibly. It can meet different

user’s different requirements, the characteristics as following:

1, Two types of start mode: Step Down Voltage Start and Variable Frequency Start.  

2, The output frequency can be set.

3, The output voltage can be set between -40 % to +20 % of rated voltage. 

The accuracy of output voltage is very high, usually no more than 1%. 

4, The DC input voltage range can also be set. Over-voltage point, under-voltage point, over-voltage recovery point, under voltage recovery point all can be set via the LCD panel. 

Convenient for increasing or reducing the quantity of batteries, photovoltaic modules also can be used flexibly.

5, The under-voltage recovery time can be set. 

6, Pure sine wave output. with good transient response less than 50MS, little harmonic distortion, higher

 conversion efficiency and stable output voltage.

7, Powerful data display and fault instruction function. LCD can display the DC input voltage, output 

frequency, phase voltage, phase current, AC bypass input voltage, output power KWH, time and date,

 temperature, fault code display.

8, Using the fifth generation efficient IPM intelligent module from Japanese Mitsubishi, high efficiency 

and stable performance. It with powerful protection function, the protection for short circuit, over load, 

over temperature is more safe and reliable. Itservice life can up to 15 years or more.

9, Wide input voltage can be set according to customer’ requirement. Input voltage range can be selected

 from 100-500v, 200-850v.

10, Could add AC bypass input: Battery power priority (When battery power used out, it will automatically  switch into AC bypass input) or Main power priority (when main power is down then the inverter will automatically switch to work from battery)

11,The Inverter is suitable for areas without electricity, motor, marine, solar power system, wind power systems etc.

12, Output AC Power is suitable for all types of home appliances, LED lamps, electric tools, electric motors etc.

13, High conversion efficiency, Max. Efficiency≥96%

14, Adopts black pure aluminum radiator, which confirms the best radiating performance.

15, Adopts low consumption anti-diode, even if wrong connection battery positive and negative pole,

 it won’t be damaged.

16, Adopts high quality fan, which could continuously work for 5 years and uninterrupted work for 20 years.

17,Have passed the European CE (EMC and LVD) certificated and accredited by Australia CEC energy network.




Isolation mode

Low Frequency Transformer

DC Input

Input rated voltage (Vdc)



Input rated current(A)



AC Output

Rated output power


Output waveform

Pure sine wave


Single phase 2 wire + ground

2 phase 3 wire + ground

3 phase 4 wire + ground

Output rated voltage

220VAC ±3%

120/240VAC ±3%

380VAC ±3%

Output Frequency

50Hz or 60Hz±0.05Hz

Rated Output Voltage (V)

120/220/230/240/380/400/415VAC optional

Power Factor(PF)


Overload Ability

150%, 10s



Waveform distortion rate (THD)

<3%(Linear load)

Dynamic Response (0 to 100% load)




Running mode

Working continuously

Electrical insulation properties

2000Vac, 1 Minute

Protection function 


Input reverse polarity, under voltage, overvoltage, output over-current, short circuit, overheating etc.

Cooling method


Short-circuit protection

No automatic recovery, need to restart the machine

working environment

Ambient temperature


Using environment humidity

0~90%,No condensation

Noise ( 1 meter)


Degree of protection


Using altitude(m)


CE Standard

EN60950-1:2006+A11:2009, EN61000-6-4:2007+A1:2001, EN61000-6-2:2005, EN61000-3-12:2005, EN61000-3-11:2000








Packaging & Shipping


 1, Packing: SANDI standard export honeycomb carton packing suitable for shipment.

  2, Shipping: By sea or by air or by DHL optional by customer.

  3, Price Term: FOB Ningbo/Shanghai or CIF port name


Our Services

Warranty time: 2 years from the date of purchase. (except man-made damage, if there is a quality problem, Non-human damage in the 2 years warranty, we repair free of charge). Also supply technology support all the time.


Company Information

Yueqing Sandi Electric Co., Ltd in China, we are a professional manufacture for Off Grid Pure Sine Wave Inverter, Grid Tie inverter,PV Combiner Box, Solar Pumping Inverter, Solar Charge Controller, Wind-Solar Hybird Controller, PV Inverter-Controller Integrated , Single Phase to 3 Phase Converter and VLF AC High  Voltage Tester more than 8 years. Also we are experienced in designing the different solar power system for home and industrial/commercial use.  

Approved by CE(EMC&LVD), SAA(AS4777&AS3100), G83, G59, ISO9001 certifications, with top engineer and the most advanced technology in China. 


OEM Service

Accept OEM


 CE(EMC&LVD), SAA(AS4777&AS3100), G83, G59, ISO9001 certifications


















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