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Quick Details

  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Sandi
  • Model Number: SDP-40KW
  • Output Power: 1 - 200KW
  • Output Type: single/two/three phase
  • Size: 650*750*1100mm
  • Weight: 300kg
  • Input Voltage: 360Vdc
  • Output Voltage: 110/120/220/230/240/380/400/415VAC optional
  • Type: DC/AC Inverters
  • Output Frequency: 50Hz or 60Hz ±0.5Hz
  • Output Current: 60.6A
  • Isolation mode: Low Frequency Transformer
  • AC output waveform: Pure sine wave
  • Display: LCD
  • Efficiency: ≥94%
  • Waveform distortion rate (THD): <3%(Linear load)
  • AC Bypass Input: Optional
  • 100% full power output: Yes
  • Start Mode: Variable Frequency Start and Step Down Voltage Start
  • Setting flexibility: The DC input voltage range, output freuency/voltage can be set
  • Certifications: European CE(EMC&LVD),UL1741&CSA22.2

Packaging & Delivery

Packaging Details Packing of 40kva 3 phase low frequency off grid inverter is SANDI standard honeycomb carton with pallet or wooden box
Delivery Time 6-8 working days


Product Description

Low Frequency Off-Grid Pure Sine Wave Inverter

SANDI SDP series Low Frequency Off Grid Pure Sine Wave Inverter is one of the most 

advanced DC to AC conversion products in the world. It’s widely used for solar energy, wind turbine and other renewable energy systems, also suitable use in the mountains, pastoral, border, island, vehicles, ships and other areas without electricity which can provide and guarante effective power supply. It has the main advantages of high quality sine wave AC output, microcomputer control, humanness design, high efficiency, low no-load loss and no pollution. The inverter can also supply AC power to all kinds of electric equipment, air conditioners,electric motors, refrigerators, fluorescent lights,televisions,electric fans and other industrial power supply.

1.Using the fifth generation efficient IPM intelligent module from Japanese Mitsubishi, It with powerful protection function for short circuit, over load and over temperature which is more safe and reliable. Longer service life can up to 15-20 years or more.


2. Intelligentized, modularized and simple structure design, very easy and convenient for maintenance


3. Two kinds of start mode: Step Down Voltage Start and Variable Frequency Start

Variable Frequency Start is suitable for inductive load with big instant inrush current(such as 

motor), inverter’s power not need enlarge too many times when take motor induction load. This function save the cost of frequency converter’s usage, easy to connect wires and control.


4. The output frequency 50Hz/60Hz can be set via LCD panel. 


5. The output voltage can be set between -40 % to +20 % of rated voltage. And the accuracy of output voltage is very high less than 1%. 


6. The DC input voltage range can be set. over-voltage point, under-voltage point, over-voltage recovery point, under-voltage recovery point and under voltage recovery time all can be set via the LCD panel. Convenient for increasing or reducing the quantity of batteries and solar panel in the future.


7. Wide input voltage can be selected from 100-400v or 300-850v. This wide voltage input off grid inverter can work without battery and solar charge controller, which save battery cost and same like with MPPT function can maximum make full use of solar power.


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

distortion, higher conversion efficiency and stable output voltage.


9. Low frequency transformer, which ensure the AC busbar and DC busbar are completely 

isolated, inverter with higher efficiency >94% and very little no-load loss.


10.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.


11. AC bypass input function optional: Battery Power Priority or AC Bypass Priority work mode can be set.


12. RS485 remote monitoring function optional

13. Solar charge controller and AC to DC battery charger built in optional for customer 

14. Can be customized to customer’s specification.



  • RS485 remote monitoring
  • AC Bypass input
  • Built in solar charge controller and AC to DC battery charger




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

3 phase 4 wire

 + ground

Output rated voltage

220VAC ±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


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

Welcome OEM service

MOQ=1 pc

Short delivery time

Can be custom made


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