COTEK SD3500-112 3500 Watt Pure Sine Inverter With Transfer Switch

The SD2500/SD3500 Pure Sine Inverter with AC transfer switch & parallel function: The parallel design of the SD Series inverter allows for power expansion, AC transfer and automatic master mechanism to eliminate single point failure and optimize reliability. Other features includes built-in ATS and AC circuit breaker. The SD series pure sine wave inverter implement the state of the art design topology with the following advanced functions: wide DC input voltage / wide operating temp to fulfill majority of applications; low profile and stylish design with output voltage selectable switch (100/110/115/120) which makes the product more user friendly. This high efficiency UL 458 approved (hardwire only) microprocessor controlled DC-AC inverter converts 12 Volts DC to 3500 watts of pure sine-wave AC power at 100/110/120 Volts, 50/60 Hz. Features include overload, short circuit, over-temperature, low battery, polarity reverse, under & over voltage protections, transfer switch and 35A circuit breaker, RS-232 communication port. This unit is suitable for heavy AC power demands such as computers, video equipment, DVD players, stereo equipment, marine electronics, tools, appliances, etc. GFCI and Hardwire versions, only Hardwire UL Listed.

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Cotek 3500 Watt Pure Sine Inverter front Cotek 2500 Watt Pure Sine Inverter back Part#: SD3500-112

Cotek 3500 watt
12 Volt GFCI
Pure Sine Inverter


Cotek 3500 Watt Pure Sine Inverter front Cotek 3500 Watt Pure Sine Inverter back Part#: SD3500-112

Cotek 3500 watt
12 Volt Hardwire
Pure Sine Inverter


Specifications:  Features:
Dim (LxWxH):19.53 x 11.14 x 5.04 Switch Mode Design
Actual Weight:22.0 High Efficiency
Ship Weight:24.0 Overload Protection
DC Input:10.0 - 16.0 VDC Low Battery Alarm
Output Voltage:100/110/115/120 +/- 3% VAC Low Battery Shutdown
Output:3500 Watts Low Idle Power Draw < 1400ma
Output Surge:6000 Watts Temperature Controlled Fan
Receptacles:GFCI or Hardwire UL for hardwire
Temperature:-4 F to 104 F Derates to 60C
Warranty:2 Years Transfer Switch

DC-3500 Inverter installation kit - 400 amp Class T Fuse Part#: DC-3500-Kit

Inverter Install Kit
4/0 Gauge 400 Amp Fuse


4/0 Gauge Cable Kit with 400 Amp Fuse

  • 10 feet of 4/0 AWG red marked cable
  • 10 feet of 4/0 AWG black marked cable
  • Littlefuse UL Class T Fuse Holder
  • 400 amp Class T fuse
  • Anti-corrosion connectors
  • Cable operating temperature -40C to 90C
  • Cable - high strand count annealed and tinned copper

Cotek Pure Sine Inverters/True Sine Inverters

Cotek inverters are premium quality electronic switch mode devices which take DC input from a battery or battery pack in 12 volt, 24 volt or 48 volt DC, and invert that power to 115 or 230 volt AC (alternating current) power. We carry only pure sine (true sine) units, as the modified sine power inverters are widely available. Pure sine inverters provide clean, utility grid type power (sometimes even cleaner) for proper functioning of AC devices, particularly electronic types such as computers, monitors, video and audio equipment, some motor types, and anything with a timer or microprocessor control that are sensitive to AC voltage variation. These units feature low voltage alarms and low voltage shutdown.

Be sure to see our inverter tutorial.

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