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Micro-Air easy start

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AlaskaAviator View Drop Down
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Post Options Post Options   Quote AlaskaAviator Quote  Post ReplyReply Direct Link To This Post Topic: Micro-Air easy start
    Posted: 13 Sep 2019 at 10:47am
Installed a Micro air easy start on my AC unit yesterday. 2200 Honda starts it right up now. 195 model.
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Olddawgsrule View Drop Down
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Post Options Post Options   Quote Olddawgsrule Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 2019 at 12:52pm
Originally posted by AlaskaAviator

Installed a Micro air easy start on my AC unit yesterday. 2200 Honda starts it right up now. 195 model.

It should if done right and happy to hear it works for you. All they are is a capacitor bank allows the current to get stored first, then releasing to remove the surge from you generator. 


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Post Options Post Options   Quote StephenH Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 2:38pm
Correction: A Micro-Air Easy Start is more than "a capacitor bank." 

From the Micro-Air site:

"EasyStartâ„¢ - The most advanced & effective soft starter for all A/C applications
EasyStartâ„¢ is a one-of-a-kind, custom-developed soft starter for single-phase motors. It employs a 4-part start ramp sequence that is self-optimizing, resulting in the lowest possible start-up current. EasyStart can deliver 65-75% start current reduction as compared to a compressor's LRA (locked-rotor amperage). EasyStart is the perfect solution that allows an air conditioner or refrigeration compressor to operate on a generator, inverter, or limited utility power when it would otherwise not have functioned. It can also be applied to air compressor and fluid pump motors"

So, it is a soft starter, which is a far cry from a hard start capacitor. It has a learning capability to recognize the power source and adapt the start sequence. The Relearning EasyStart-364 instructions have a good picture of at least part of the inside of the unit. While there is a capacitor in there, there is also a circuit board to control the soft-start process.

See also the FAQ on the MicroAir site.
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offgrid View Drop Down
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Post Options Post Options   Quote offgrid Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 3:10pm
+1. The Easy Start also monitors the voltage to the compressor while running and shuts it down if the voltage sags too low (either because the genny is overloaded or there is a sag in grid line voltage) . It will attempt a restart after 5 minutes. So, its doing a lot of fairly complex tasks. 

OTOH, it is switching in start capacitors (I think in several stages) in order to achieve as soft a start as possible. So, in a way, both of you are right. Thumbs Up
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Post Options Post Options   Quote Olddawgsrule Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 4:47pm
Okay guys, the hype is obvious. Marketing is very good and product is selling. 

Enough said..



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Post Options Post Options   Quote Olddawgsrule Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 4:54pm
Originally posted by offgrid


OTOH, it is switching in start capacitors 

You're on the right path.. It's all abut the right capacitors. The rest is marketing..

Going back to being silent..

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Post Options Post Options   Quote GlueGuy Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 6:27pm
If the capacitor(s) is/are storing charge, they would only be useful for 1/2 of a 60 Hz cycle, or a little over 8 milliseconds. That is probably not how the easy start works. 

OTOH, the right capacitor would delay the voltage curve relative to current curve (making an inductive load more resistive, or less reactive if you prefer). This would have the effect of making the voltage and current more in-phase with each other and thusly increasing the actual power to the compressor motor (which is a mostly inductive load).

I don't know which; someone with an easy start might be able to tell if it's more than just a capacitor in there.
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Post Options Post Options   Quote StephenH Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 2019 at 9:09pm
Originally posted by GlueGuy

If the capacitor(s) is/are storing charge, they would only be useful for 1/2 of a 60 Hz cycle, or a little over 8 milliseconds. That is probably not how the easy start works. 

OTOH, the right capacitor would delay the voltage curve relative to current curve (making an inductive load more resistive, or less reactive if you prefer). This would have the effect of making the voltage and current more in-phase with each other and thusly increasing the actual power to the compressor motor (which is a mostly inductive load).

I don't know which; someone with an easy start might be able to tell if it's more than just a capacitor in there.

The picture to which I referred in my post shows that there is a large capacitor and below that, a circuit board. How it works, I don't know. While it does decrease the starting surge current needed to start the compressor, it will not allow the AC to run if the generator is overloaded. IOW, I can run the AC and the converter IF the batteries are charged and all that is needed is  a float current. I can't run any of the other high-power-draw items at the same time either. My iX2000 will run the AC, and it does not bog down like it did before I installed the EasyStart. It does throttle up, but more gently than before. I'm not sure how else to describe it. I will say that the Micro-Air EasyStart is much more than marketing hype. The other alternative would have been to ditch the iX2000 and go for a Predator 3500 or equivalent.
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Post Options Post Options   Quote offgrid Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2019 at 3:55am
Originally posted by Olddawgsrule


You're on the right path.. It's all abut the right capacitors. The rest is marketing..

Going back to being silent..


If you can accomplish what MicroAir has done with just a start cap you should mount that in a black box and go into business (adding some marketing hype of your own of course. LOL)

I didn't want to spend $300 hard earned dollars on what $10 worth of caps could do either, but in the research I did I didn't find any other product or DIY option that would consistently and reliably allow a 2kW genny to start a 13.5 kbtu/h a/c. And I didn't want to fool around on the roof of my trailer doing a bunch of trials in hopes of maybe finding a cheaper solution.The EasyStart does the startup job very well, plus a couple of other useful functions.  

Is it worth the $300? Sure, for those who need it. Its priced based on the functions it performs, not on the cost of its components. It addresses a small market segment which hasn't yet attracted cheap asian competition. I'm sure that will change given time. 

Of course, it doesn't create energy, so it won't allow you to run a 3kW load on a 2KW generator. You have to leave pretty much all your other AC loads off while the a/c is on. 

Overall, I would recommend the product, if you expect to boondock in places where you need a/c, don't want to lug a large generator, and (importantly) are allowed to run a genny during the hours you are trying to stay cool. This last one was the gotcha for me, the warm country campgrounds we go to all have quiet hours rules, so I've made only limited use of the genny running the a/c.   

 


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StephenH View Drop Down
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Post Options Post Options   Quote StephenH Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2019 at 6:10pm
In my case, we tend to stop at free places (e.g. Walmart parking lots) while we are traveling between destinations. Since there are no hook-ups available, I have used the generator to cool off when the weather was just too hot to do without AC. Some of the parks we have stayed at also have the restriction on what hours a generator may be operated. It is quite annoying when someone is operating a non-inverter generator outside those hours. Restrictions don't apply when at a truck stop or Walmart though. Still, my Generac iX2000 is a lot quieter than some of the generators I have heard.
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