--- product_id: 5152418 title: "Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502)" brand: "mighty mule" price: "1218 zł" currency: PLN in_stock: true reviews_count: 10 url: https://www.desertcart.pl/products/5152418-mighty-mule-automatic-gate-opener-for-heavy-duty-dual-swing store_origin: PL region: Poland --- # 12V battery backup Solar compatible with tax credit Heavy-duty dual swing opener Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) **Brand:** mighty mule **Price:** 1218 zł **Availability:** ✅ In Stock ## Summary > 🚪 Unlock effortless security with a touch—because your home deserves the best! ## Quick Answers - **What is this?** Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) by mighty mule - **How much does it cost?** 1218 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/5152418-mighty-mule-automatic-gate-opener-for-heavy-duty-dual-swing) ## Best For - mighty mule enthusiasts ## Why This Product - Trusted mighty mule brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Energy Savings:** Qualify for a 30% residential energy tax credit when paired with Mighty Mule solar panel (FM123). - • **Reliable Backup Power:** 12V battery backup ensures gate operation even during power outages—security never sleeps. - • **Powerful Dual Gate Control:** Handles gates up to 18 ft. long or 850 lbs per leaf with commercial-grade strength. - • **Effortless DIY Installation:** Interactive video guide and all-inclusive kit mean no electrician or welding needed—install at your own pace. - • **Customizable Safety & Convenience:** Adjustable auto-close timer (0-120s) and UL-approved obstruction sensing for peace of mind. ## Overview The Mighty Mule FM502 is a heavy-duty automatic gate opener designed for dual swing gates up to 18 feet long or 850 pounds per leaf. Featuring a 12V battery backup, solar compatibility, and an easy DIY installation kit with video instructions, it offers reliable, energy-efficient access control. Backed by an 18-month warranty and advanced safety features like adjustable auto-close and obstruction sensing, it’s the premium choice for upscale homes seeking seamless security and convenience. ## Description Product Description Automatic opener for dual gates, each opener opens a gate up to 18' long & up to 850 lbs per leaf, solar compatible, 12V battery backup for power failure, kit includes: Openers, remote entry transmitter, mounting hardware, 12V transformer, control box, installation instructions & video, standard features include adjustable automatic closing 0 to 120 seconds & adjustable obstruction sensing. From the Manufacturer Have you ever wanted to be able to open your gate with the touch of a button? With a Mighty Mule automatic gate opener, you can and you can install it yourself! The Mighty Mule FM502 dual gate opener is a heavy duty, commercial grade swing gate opener that is very easy to install. It is ideal for dual gates weighing up to 850-Pound or up to 18-Feet long per leaf. The FM502 comes with a standard do-it-yourself kit, which includes an installation video, detailed manual, battery, one transmitter, all mounting hardware and an 18-Volt AC transformer. This durable opener features soft start/soft stop, adjustable auto close (0-120 seconds), adjustable gate activation alert, UL approved obstruction sensing systems, as well as an extra large control box that is prewired for an optional second battery (we recommend a second battery for solar and for dual applications). The 12-Volt, DC-powered low-Voltage system is powerful, dependable and durable. Ideal for gates that open into the property (standard in kit) or with gates opening away from the property using two push-to-open brackets FM148 (sold separately). Review: do not waste any of your money on anything else - do not waste any of your money on anything else. get this brand. Trust me. that other junk stressed me out! hand to send back with all of that stress. when you get this take the laptop to the gate , bring up youtube and watch, pause watch pause take your time get a beer, coffee, soda, take a break go play the dog a little. next thing you know you are done, and it works great noting worse than re doing instructions, or not being able to understand because you are in a hurry. I have a upscale kinda a house, man it looks great, I got this because we now have the grand kids a few days of the week, this along with the fence, they and the dong are in LOCK DOWN! and it looks like (the housewife show) YEA hit the remote...open gate, I feel rich! no stress , take your time , it feels so good when it comes together- ps I did have one q about a push button I added, she answered the phone, I told her my issue she said< 'honey it will not work if you are using a lighted door bell" I thought that was funny,in a good way... but correct. Got one no light, bada bing bada boom , taking out the trash? push the button! Review: So far so good. Comparing swing gates to slide gates, we prefer slide gates but the FM502 is working well so far... - Reviews of the GTO and Mighty Mule (MM) Do-It-Yourself (DITY) gates kits are mixed and many folks sustaining lightning strikes are unhappy with GTO/MM warranty coverage of their failed main boards or controller arm circuit boards. Other have has issues with the long term durability of swing gate operator mechanisms. We have had a GTO SL3000 12-volt DC solar slide gate operator in service for ~12 years with few problems other than an out-of-warranty failed main controller board at the 5 year point. Our most recent acquisition and installation was a solar powered Mighty Mule FM502 Heavy Duty Dual Swing gate system purchased via from desertcart. Between the two we prefer the sliding gate design and operator function to that of the relatively slow swing gates operation for both security and strength, but both suffice to control access to your property which is the main point of automatic gates. The installation of the FM502 is straight forward the the operators have worked well in light use. The GTO SL3000 unit s a much heavier duty unit but is for slide (rolling) gates. Some folks have complained the MM FM series swing openers are noisy in operation and we can only assume that complaint relates to the alarm beep option when the gates are either opening or closing. This in-operation alarm can be turned off with an on-board dip switch setting change. Factory default is for alarm sound during operation. The gates otherwise just have a mechanical gear noise that is not obtrusive and is basically a "background" type noise only when in operation. . ## Features - Mighty Mule's strongest dual swing gate opener; designed for gates up to 18 ft. long or 850 lbs. per gate panel. - Perfect for all gate types including ornamental, chain link, tube, panel, vinyl and wood. - Easy DIY (Do It Yourself) installation that includes an interactive DVD for added assistance. - All-inclusive kit that does not require welding or an electrician. - 30% Residential Energy Efficient Property Tax Credit available! Residential home owners can use this credit on a new operator system, accessories and installation with the purchase of a Mighty Mule 10-watt Solar Panel (FM123). - Backed by an 18 month Mighty Mule Warranty and Technical Support. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0007PANGY | | Batteries Included? | Yes | | Batteries Required? | Yes | | Customer Reviews | 3.8 3.8 out of 5 stars (119) | | Date First Available | October 2, 2003 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 52 pounds | | Item model number | FM502 | | Manufacturer | Mighty Mule | | Part Number | FM502 | | Power Source | corded-electric | | Product Dimensions | 15 x 46 x 15 inches | | Voltage | 12 Volts | | Warranty Description | Limited 18 Month Warranty (from date of purchase) | ## Images ![Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) - Image 1](https://m.media-amazon.com/images/I/81amizTZquL.jpg) ![Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) - Image 2](https://m.media-amazon.com/images/I/81KAdq+YO2L.jpg) ![Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) - Image 3](https://m.media-amazon.com/images/I/917Ry3XYJsL.jpg) ![Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) - Image 4](https://m.media-amazon.com/images/I/71Amm1si2bL.jpg) ![Mighty Mule Automatic Gate Opener for Heavy Duty Dual Swing Gates for 18 Feet Long or 850 Pounds per Leaf (FM502) - Image 5](https://m.media-amazon.com/images/I/71YWuDhwyiL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ do not waste any of your money on anything else *by J***N on September 13, 2016* do not waste any of your money on anything else. get this brand. Trust me. that other junk stressed me out! hand to send back with all of that stress. when you get this take the laptop to the gate , bring up youtube and watch, pause watch pause take your time get a beer, coffee, soda, take a break go play the dog a little. next thing you know you are done, and it works great noting worse than re doing instructions, or not being able to understand because you are in a hurry. I have a upscale kinda a house, man it looks great, I got this because we now have the grand kids a few days of the week, this along with the fence, they and the dong are in LOCK DOWN! and it looks like (the housewife show) YEA hit the remote...open gate, I feel rich! no stress , take your time , it feels so good when it comes together- ps I did have one q about a push button I added, she answered the phone, I told her my issue she said< 'honey it will not work if you are using a lighted door bell" I thought that was funny,in a good way... but correct. Got one no light, bada bing bada boom , taking out the trash? push the button! ### ⭐⭐⭐⭐ So far so good. Comparing swing gates to slide gates, we prefer slide gates but the FM502 is working well so far... *by P***C on December 22, 2015* Reviews of the GTO and Mighty Mule (MM) Do-It-Yourself (DITY) gates kits are mixed and many folks sustaining lightning strikes are unhappy with GTO/MM warranty coverage of their failed main boards or controller arm circuit boards. Other have has issues with the long term durability of swing gate operator mechanisms. We have had a GTO SL3000 12-volt DC solar slide gate operator in service for ~12 years with few problems other than an out-of-warranty failed main controller board at the 5 year point. Our most recent acquisition and installation was a solar powered Mighty Mule FM502 Heavy Duty Dual Swing gate system purchased via from Amazon. Between the two we prefer the sliding gate design and operator function to that of the relatively slow swing gates operation for both security and strength, but both suffice to control access to your property which is the main point of automatic gates. The installation of the FM502 is straight forward the the operators have worked well in light use. The GTO SL3000 unit s a much heavier duty unit but is for slide (rolling) gates. Some folks have complained the MM FM series swing openers are noisy in operation and we can only assume that complaint relates to the alarm beep option when the gates are either opening or closing. This in-operation alarm can be turned off with an on-board dip switch setting change. Factory default is for alarm sound during operation. The gates otherwise just have a mechanical gear noise that is not obtrusive and is basically a "background" type noise only when in operation. . ### ⭐⭐⭐⭐⭐ Beast gate opener! *by A***R on December 31, 2014* i have a heavy duty gate, probably weighs well over 600 pounds each and it opens like a champ. Add another battery to make it open and close faster. One battery won't cut it. Buy the extra as it holds 2 inside the case. Also buy solar option, it hooks up easily to the computer panel. This is my 2nd buy for another house. My 1st one was bought 10 years ago and still works like a champ. You just have to becareful to make sure the cotter pins don't fall off or else the arm and fall down and crack the metal because when the sun beats down on it year after year, all it takes is a stump to crack it. I welded it back and works like a champ. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/5152418-mighty-mule-automatic-gate-opener-for-heavy-duty-dual-swing](https://www.desertcart.pl/products/5152418-mighty-mule-automatic-gate-opener-for-heavy-duty-dual-swing) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-10*