COTEK 3500 Watt 24V PSW Inverter with Transfer Switch SD3500-124

Original price was: $1,280.00.Current price is: $1,154.00.


Availability: Available on backorder SKU: SD3500-124 Categories: , Tag:


The SD series is a pure sine wave (THD < 3%) inverter designed especially for the most demanding mobile and off-grid applications. SD series provides up to 90% of high efficiency and wide operating temperature range (from -20°C~+50°C) designed for many harsh environments.

The N+X parallel redundancy framework design can greatly improve the power system’s flexibility and thus the system’s volume and weight are remarkable reduced. SD series features a built-in transfer switch and synchronized operation with utility AC source. SD series can be used for N+1 (N≦14) redundancy and the ability of enlarge the capacity (Users can install maximum 15 units of inverters together in parallel in order to provide the power expansion). SD series also provides complete protection functions including Input low voltage, Overload, Short circuit, Low battery alarm, Input over voltage and Over temperature.

This inverter is the perfect fit for low maintenance, off-grid, remote installations.


COTEK Part Number: SD3500-124



  • Parallel redundancy design for power expansion
  • Multiple industrial applications that create 1Ф3ω / 3Ф4ω power systems
  • Automatic master mechanism to eliminate single point failure and optimize reliability
  • Built-in ATS and AC circuit breaker
  • RS-232 communication
  • Input & Output fully isolation
  • Output voltage / Power saving mode selectable by DIP switch or remote control (CR-10)


Input protection

  • Reverse Polarity (Fuse) protection
  • Under voltage protection
  • Over voltage protection
  • Output protection
  • Short circuit protection
  • Overload protection
  • Over temperature protection


Output protection

  • Short circuit protection
  • Overload protection
  • Over temperature protection
  • Over voltage protection



  • Rated Power: 3500 Watts
  • Surge Power: 6000 Watts
  • Efficiency (full load@ rated VDC): 90%
  • Power consumption @ save mode: 0.5A
  • Working Temperature: -20°C~+60°C
  • Dimensions (WxHxD): 11.4″ X 5.05″ X 19.52 inches


Additional information

Weight17 lbs

2 Year