Many of our clients don’t really have a choice. We cover a mostly rural area where the gates are nowhere near a power source. The one and only option for having the convenience of a gate that automatically opens and closes is solar power.
However, some of you do have a choice and want to know the pros and cons for either option. Or, maybe you have been told one or the other is better and want to know why they said that. So, let’s discuss.
The Basics of AC and DC Power
If you don’t know, I’m writing this from the perspective of a wife of an entrepreneur who started a gate business. He and our long-time technician, Frankie Love, like to figure out how things work. I just like the light to come on when I flip the switch. While I understood that solar power came from the sun, I didn’t really understand the rest until I wrote this.
My husband, Jeffery Presbaugh, explained that AC power is the power supplied through the lines from electrical company. It’s the electricity you use in your house to power the coffee maker, television, etc.
All electricity is made up of 2 polarities. It is like the magnets we played with as kids in school. They have a positive and negative side just like electricity.
AC stands for “alternating current” because the polarity is alternated back and forth. Current may also be called amperage. Both describe the flow of electricity.
DC is power that doesn’t alternate. It means “direct current” and will be either DC positive or DC negative. Batteries and solar panels are only capable of direct, DC power.
Most operators on the common market are AC operators that go through transformers to provide DC power to accessories and the motor. This allows for safer operation in damp environments and enables the use of batteries for back up in case the power company has a power failure.
Why Batteries If Using AC Power?
I assume this question comes from a thought that batteries are rather expensive and typically need to be changed out every couple of years.
While there are some gate operator models that are directly AC powered, more and more AC-powered models now come equipped with battery backup that would kick in case of a power outage. Those are what we recommend and install.
Batteries Plus has been our vendor of choice in Weatherford, Texas. They have been great to work with and will give our clients a little break if you mention our name.
Which Costs More?
I recently worked-up two estimates for the same gate operator package. The only difference was that one was solar and the other was AC-powered. The solar package was about $220 more. This is not a universal difference. I’m just giving you an example.
When you purchase a solar system you pay for the power up front. The power for an AC-system is on your electric bill every month. The solar panel size needed to run a gate operator relatively inexpensive.
More Solar Panels = More Power, Right?
We get this question when a battery keeps running down, so it is assumed that adding solar panels will increase the power and keep the battery up and running longer. It may just mean you need to replace the battery, but it depends on the amount of usage the gate is getting.
A battery can only absorb so much input of power. Most solar applications provide or have a built-in solar maintainer that limits the amount of power the battery will accept. When the battery gets full, the maintainer shuts off the power supply from the panel. A higher volume of use could mean you need additional panels, but only to a degree.
Most residential gate operators are considered “light-use” and will use 12-volt, DC power with a 10 watt solar panel to receive power. As of right now, we don’t recommend any solar applications for commercial use. However, solar is rapidly improving and depending on your situation, there could be a high-volume application that might work for you.
Can Your Current System Be Converted?
It is possible, but it depends. Ask whoever installed it. Or, have a technician out to assess it. I can’t answer that here.
THE QUESTION: Are AC-Powered Operators Better than Solar?
The honest answer is that it depends. I know, so anti-climactic!
Solar excels in locations without the availability of AC power or if it is cost prohibitive to provide access to it via a power pole. However, solar is limited in usage or cycles per day due to exposure limits of sunshine.
I like lists, so let’s make a list of the limitations and the benefits of both. Let me know if I missed anything in the comments!
LIMITATIONS |
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Solar |
AC-Power |
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BENEFITS |
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Solar |
AC-Power |
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Great information! I am working on a piece of land and getting ready for gates. There is no power out there yet so solar may be our best option. Thanks! Betty
Great! Glad the article was helpful. Thanks for letting us know!
Love you thoughts. I would like to convert my system from solar to AC. I use a 24MS battery now but I’m tired of replacing batteries. The gate constantly stops multiple times when opening. With this battery, have any recommendations for an AC-DC converter?
Hard to say. We don’t have enough information to answer you well. One thing you might need/want is a battery maintainer.
I’m thinking of putting up a new gate to the back of my home. I would like solar so that I don’t have to run electricity. How much space is required for the equipment? I have a small retaining wall and fence on one side and closed in carport on other .
Assuming you are talking about a swing gate and … assuming it would be one with an actuator (rather than a pedestal mount) … there are lots of options for where to mount a control box so it is really impossible to answer your question. We’d recommend calling a local installer to have them come out and take a look or sending in some pictures. I’m including a link to a video that talks about disabling an 816 arm. you can see the control box to the far right side on the fence. It doesn’t have to be mounted exactly there. Otherwise, you can see the arms don’t take up much room. Hope this helps a little. https://youtu.be/gcQYTDrZq0I
Excellent information. Thank you. I gotta say I am sick of our solar/battery powered DC gates. For 10-12 years, every year we have to change out batteries or panels or something. Very Costly. These gates are at our home’s driveway in Palo Pinto. We have a co-op for an electric company and I don’t think the power pole is more than 5o’ away from the gates. For better reliability I want to look into electric AC gate openers. But I assume there will still need to be batteries for remote and keypad openers?
You’ll still have battery backup. We don’t install or automate gates anymore. We are only designing, building and delivering gates. I wrote this a few years ago when we were handling electric and solar gates as well. Thanks for reading it.