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The RB570 is an 18 Volt AC transformer for use with many Mighty Mule automatic gate openers. The transformer maintains battery backup by providing a trickle charge of power to the gate opener battery. Compatible with the Mighty Mule300 and 500 series.
From the Manufacturer
The RB570 is an 18 Volt AC transformer for use with many GTO/Mighty Mule automatic gate openers. The transformer maintains battery backup by providing a trickle charge of power to the gate opener battery. Compatible with the Mighty Mule FM500, FM350, GTO/PRO-1500, PRO-2500, PRO-3000, and PRO-4000.
Jim brown
2025-06-14 10:05:52
I use it to charge my 12 v battery for gate opener
Joel B.
2025-05-29 15:31:47
Stock replacement fix and works like it should, the gate opener has been in service for over 4 yearsThanks
RONALD MCHUGH
2025-05-27 16:24:57
This does what it is supposed to do . I wish I could use it . Hurricane Beryl apparently knocked out the onboard charger . I had to bypass it with a Battery Tender .
DK
2025-05-08 21:32:04
A necessary part to operate your gate opener. A bit bulky.
Andy in Washington
2025-02-28 17:11:40
The transformer on my gate opener seems to die every couple years. Usually I order directly from Mighty Mule, but in this case I was desperate to have the unit online quicker. I found this unit on Amazon, and it appears to be an exact match for the original product from Mighty Mule.The wiring connections are identical to the original, and it ven includes the center screw mount (you can't see it in the photo) to anchor the transformer into the outlet. It supplies an honest 18V, even under the full load of the trickle charge.I read through the specifications, and while it doesn't list a low temp minimum, it does indicate that the unit will malfunction at low ambient temperatures. Our winters here in the Northwest are typically pretty mild, but we very occasionally get temps down into the single digits. Such was the case last week when my old unit failed, and if memory serves, the same conditions occurred last time on of these things failed.So, I guess the unit could certainly be a little more robust. On the other hand, they don't cost a whole lot of money, and if $20 a year is the cost of not getting out in all sorts of weather to open the gate, it is a fair deal for me. I finally ordered a spare, so I am not dependent on the UPS guy next time one dies.
dogfoodman
2025-01-15 15:02:29
My mighty mule opener was starting to sound sluggish and finally failed to open. Thought it might be the batteries and replaced them. The gate opened just fine for a few weeks, then started to sound sluggish again and then failed to open. Checked to control board indicator lights and determined that the system was not charging, then found out that the Mighty mule transformer had failed after 18 years. Ordered a new one, slapped it in, 24 hours later checked the battery voltage and found that it was down to about 2 volts which is a long way from the rated voltage of 12. Pulled the battery off the system and did a manual charge for a day, then reinstalled the battery back into the gate control box, the system then saw the battery and began its normal charge cycle. So the lesson learned is that if the system batteries become too discharged the Mighty Mule charge controller will no longer see the system batteries. In my case a manual battery charge was all I needed to bring the system back online. This prevented having to purchase a new control board which would not have solved the problem.
J. Schmoe
2024-12-24 11:39:04
My last transformer seemed to have given out after 17 years, so I replaced it with one of these. I also replaced the battery. Now, one year later, either the battery has given up, or the transformer has, because my driveway gate is barely moving. Both are warrantied for 1-year. How convenient.
Stewart V.
2024-12-07 16:36:45
Original transformer stopped functioning after 16 years. Easily replaced with this product, works as original.Easy install for any handyman.
Catman
2024-11-22 10:05:36
First replacement was a dud, the second was damaged in transit because of the poor design of the box, third time was a charm. Works as expected. I am not a fan of the approach of having this remote charger, but I will see how this replacement fares over time. They seem to have a thermal cutout that causes them to trip out. So if you have a failure let it reset and try again.
Customer
2024-11-20 09:14:58
Overpriced. Mighty Mule is so sub par !
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