JOTTAELE ATS Dual Power Automatic Transfer Switch 2P 100A 110V

In this review of the JOTTAELE ATS Dual Power Automatic Transfer Switch, the bottom line is simple: it is a focused, compact solution for homeowners who need an automatic, fast changeover between grid and generator power. The reviewer finds the product best for household emergency circuits and small critical loads because it prioritizes mains power, switches back automatically, and completes transfers in under 8ms, which is fast enough for most residential equipment. Installation requires a DIN rail panel and a running generator to function as intended.

Key Features

• Automatic transfer: The ATS detects grid failure and switches to reserve generator power so important loads keep running without manual intervention.
• Fast transfer speed: With transfers under 8ms, sensitive household devices experience minimal interruption during switchover events.
• Compact DIN rail design: The PC type mini size fits into standard DIN rail distribution boxes, making it suitable for retrofit and compact installations.
• Dedicated ratings: Rated for 100A at 110V and compatible with 50/60Hz systems, it supports many common residential circuits within those limits.
• Priority to mains: The switch returns to the main supply automatically when grid power is restored, reducing generator run time and fuel use.

Who It's For

This ATS is aimed at homeowners and small property managers who want an automatic, low-profile transfer switch for emergency power to essential circuits such as lighting, refrigeration, or a small HVAC zone. It works well in setups where a generator is already available and will be running during outages.

Users who need higher voltages, multi-circuit managed transfer, or industrial grade robustness should look elsewhere; likewise, anyone without a DIN rail distribution box or unfamiliar with mains wiring should hire a qualified electrician for installation and commissioning.

Pros & Cons

Pros

• Simple automatic operation ensures critical loads are kept online when the grid fails.
• Compact, DIN rail form factor saves panel space and eases integration into existing distribution boxes.
• Fast transfer speed minimizes interruption to sensitive devices and reduces risk to electronics.
• Clear priority logic returns to mains to reduce generator runtime and fuel consumption.

Cons

• Build quality reports are mixed, so buyers should inspect unit condition and consider professional installation if concerned.
• Limited to 110V single-phase scenarios and requires a running generator to operate, so not suitable for higher-voltage or standalone battery backup systems.

Specifications

Product Type	Automatic Transfer Switch (ATS)
Poles	2P
Rated Current	100A
Rated Voltage	110V
Frequency	50/60Hz
Transfer Speed	Less than 8ms
Mounting	DIN rail

Our Verdict

The JOTTAELE ATS is a practical, value-oriented automatic transfer switch for residential emergency power. It combines compact DIN rail mounting, a 100A rating at 110V, and quick transfer times to protect essential circuits, making it a sensible buy for homeowners with a compatible generator and a need for simple automatic changeover.

Frequently Asked Questions

Will the ATS switch if the generator is off?
The ATS will not transfer to generator power unless the generator is running and supplying the reserve source, so the generator must be started for transfer to occur.

Can it be used for 220V systems?
This model is rated for 110V; customers reporting issues with 220V compatibility indicate this unit is not suitable for higher voltage applications.

Is professional installation required?
Although compact, the ATS installs on a DIN rail and interfaces with mains and generator wiring, so professional electrical installation is recommended if you are not experienced with distribution panel wiring.