Description
Cotek SD3500-124 GFCI Pure Sine Wave Inverter with AC Transfer Switch and Dual GFCI 120VAC 24VDC 3500W
Features
- Parallel redundancy design for power expansion
- 1Ф3W / 3Ф4W for multiple industrial applications
- Built-in ATS and AC circuit breaker
- Selectable output voltage and output frequency
- Optional STS module, transfer time less than 4ms.
- RS-232 communication interface
- Hardwire AC output, UL approved
- Input & output fully isolation
- Output voltage / power saving mode selectable by DIP switch or remote control (via CR-10)
- Input protection: Reverse Polarity (Fuse) / Under Voltage / Over Voltage
- Output protection: Short Circuit / Overload / Over Temperature / Over Voltage
- Pressed steel housing
- E13 / UL / CE / FCC approved
Accessory:
- Remote controller CR-6
- Remote controller CR-8
- Remote controller CR-10
FAQs
- Can I use the GFCI and the Hardwire AC Outputs at the same time?
Yes, both AC outputs can be used at the same time as long as the operating and surge power do not exceed the inverter's rated power (in watts). - Can I stack Cotek SD Series inverters to create a split-phase system?
Yes, Cotek SD Series inverters can be stacked to double your wattage in a 120/240 split phase output. See image below taken from the User Manual.

- The datasheet shows output wattage, but what is continuous wattage?
The output power listed on the spec sheet is the continuous power output under perfect conditions (Power factor = 1). However, this will be affected by the power factor of your load. For example, LED lighting can have a power factor of around 0.9 so you take 3500VA x .9PF = 3150 watts. For this reason, you may want to consider sizing your inverter 15-20% higher than your peak load. This compensates for the variance in PF across various loads.
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