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automatic gate opener

How to Power an Automatic Gate Opener

Gate Openers

GTO, or gates that open automatically, come with gate opener batteries that need to be charged either by an electrical supply or a solar panel, depending on how close your gate opener is to your power supply. It may be more economical to purchase a solar panel if you find that running an electric wire to your gate is not cost-effective.

There are two ways the Mighty Mule's battery can be charged.

  • Transformer (18V included with kit): All Mighty Mule E-Z Gate Openers come with a transformer for maintaining the battery charge. You can run up to 1000 ft. of low voltage wire (RB509 not included) from the opener control box to the 110 V AC outlet where the transformer is plugged. If your gate is more than 1000 ft. from an AC power source, or you just prefer to use solar power, you can use the optional Mighty Mule solar panel(s) to maintain the Mighty Mule battery backup.
  • Optional Solar Power Kits: The solar option will have some limits. The table and map illustrate the maximum number of gate cycles to expect per day in a particular area when using 5 to 30 Watts of Mighty Mule solar panels. The figures shown are for winter (minimum sunlight) and do not account for the use of any accessory items. Accessories connected to your system will draw additional power from the battery.

Solar Panel Power Application Chart
Use the following chart to determine whether your automatic gate opener should be powered by solar energy or by "grid" power, or electric lines.

Model #

Watts

Zone 1

Zone 2

Zone 3

FM350/500 - Single Swing Gates

5

4

8

13

FM350/500 - Single Swing Gates

10

8

16

26

FM350/500 - Single Swing Gates

15

11

20

30

FM350/500 - Single Swing Gates

20

14

28

38

FM350/500 - Single Swing Gates

25

17

36

46

FM350/500 - Single Swing Gates

30

20

44

54

FM502 - Dual Swing Gate

10

4

8

13

FM502 - Dual Swing Gate

15

7

13

20

FM502 - Dual Swing Gate

20

10

18

27

FM502 - Dual Swing Gate

25

13

23

34

FM502 - Dual Swing Gate

30

16

28

41

Other Considerations when Purchasing an Automatic Gate Opener
For single gates, it is recommended that you purchase an optional second battery (FM150) for back up cycles during overcast days. The control boxes are prewired for the optional second battery.

Dual gates require 10 Watts of solar charging power. Use two 5 watt panels (FM121) or one 10 Watt solar panel (FM123).