What is idle current draw when low voltage disconnect trips?

Less than 1.5 watts per advertised specs which would be about 0.1 A (100 ma).

Can this be used with AC power at inverter output? I am thinking of wiring this into a small extension cord to have a "protected" circuit.

Yes..BUT.. you need a 12 volt DPDT relay between your inverter and the load . Your DC 12 volts going into the inverter will also go into this Voltage Protector and the output from this Voltage Protector will power your DC 12 relay. When the 12 volts DC voltage going into the inverter drops to the set low voltage it will disable the relay which in turns cuts off the ac power between your inverter and your load.

What is the maximum amperage for this item?

The maximum amperage before the breaker trips is 20A

With this work with dewalt 20v batteries?

For posterity and because this question is popular: program at 15 Volts 5-cells * 3 Volts = 15 Volts At the absolute lowest, down to 2.5V per cell. But I don't recommend that for safety or longevity. I don't see anything in the description advising against Li-Ion batteries. Nor can I think of any reason this would not work for Li-Ion batteries, provided you program the shutoff correctly.

ASIN	B07929Y5SZ
Actuator Type	Push Button
Best Sellers Rank	223,481 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 133,955 in Industrial Electrical
Brand	IS
Circuit Type	1-way
Colour	Blue
Connectivity Protocol	X-10
Connector Type	Plug In
Connector type	Plug In
Contact Material	Stainless Steel
Contact Type	Momentary
Contact type	Momentary
Control Method	Touch
Controller Type	Push Button
Current Rating	20 Amps
Current rating	20 Amps
Customer Reviews	4.2 out of 5 stars 938 Reviews
International Protection Rating	IP65
Item Dimensions	5.7 x 4.2 x 1.9 centimetres
Manufacturer	icstation
Material	Plastic
Model Number	Digital Battery Low Voltage Protection
Mounting Type	Panel Mount
Number of Items	1
Number of Positions	2
Operating Voltage	12 Volts
Operating voltage	12 Volts
Operation Mode	ON-OFF
Operation mode	ON-OFF
Switch Type	Push Button
Terminal	Screw
Unit Count	1.0 Count
Wattage	1.5 watts

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