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Home » Products » Off Grid Inverter » 25kw 3 phase 380-440V off grid inverter with ac bypass input grid as backup

25kw 3 phase 380-440V off grid inverter with ac bypass input grid as backup

25kw 3 phase 380-440V off grid inverter with ac bypass input grid as backup
25kw 3 phase 380-440V off grid inverter with ac bypass input grid as backup
Product Code : SDP-25KW
Brand Name : SANDI
Product Description

25kw 3 phase 380-440V off grid inverter with ac bypass input grid as backup

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

advanced DC to AC conversion products in the world. 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. 

Low Frequency Off Grid Inverter Advantages

Others Inverter

Easy to repair

Difficult to repair

*Adopted Japanese Mitsubishi IPM intelligent module, Modular and simple structure design, very easy and convenient for maintenance, any fault only need us send you parts for replacement, maintenance is low-skill work   

Used Mosfet Tube or little IGBT, integrated and complicated structure design, very difficult for maintenance, need send product back to factory for repair,  


Little fault rate 

High fault rate

It with powerful protection function for short circuit, over load and over temperature which is more safe and reliable.

Fault rate < 1%

Incomplete protection

100% full power stable output

Not full power output

Inside with full power low frequency isolated transformer, 100% full power output, can work 24h*7, which ensure the AC busbar and DC busbar are completely isolated, the harmonic and interference is very little, constant voltage and constant frequency stable output.

High frequency transformer, little capacity not full power inverter, 10KW inverter only can output 7-8KW, can’t take full load and run 24h/day

High efficiency  

Low efficiency

> 92%


Long service life

Short service life

> 15 years

1-3 years

AC bypass input can be set

AC bypass can’t be set

City power priority or battery power priority can be set


Setting flexible


Wide DC input voltage range can be set

*The DC input voltage range(over-voltage point, under-voltage point, over-voltage recovery point, under-voltage recovery point and under voltage recovery time) can be set, convenient for adding more solar panel or battery in the future.

The output frequency 50Hz/60Hz can be set.

Variable Frequency Start control motor speed.

The output voltage can be set.

And the accuracy of output voltage is very high less than 1%.


Two kinds of start mode


Variable Frequency Start or Step Down Voltage Start

with higher capacity to drive motor inductive load, normal inverter’s power need enlarge 3-7 times at least, however our inverter with VFD function, inverter’s power not need enlarge times, for example: 5KW inverter can take 3kw-5kw pump


Big LCD display


*LCD 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.


Certificate: CE(EMC&LVD), UL1741, CSA22.2 



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