We have 2 "Guardian 16KW generators:
The one for my Fish Building has 2 Apex units on it. We have a one-hour plus power failure about once every 2 months. i.e. 6 failures so far this year. So far the 2 Apex Systems have NOT had any problems.
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The second generator is for our house. Currently I have 2 Apex units in my office for testing. (One for testing, the other is ready to be moved to the Fish Building when I have time.) Anyway, no problems with the 2 Apex units in my house.
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BUT, I do have a problem with the Generator for our house. The last 2 or three power failures, my UPS system has had problems. When the generator comes ON, the UPS should use generator power. Well, the generator is surging some and the UPS jumps between generator power and UPS battery power. So after about an hour, the battery is used up and it shuts down my computer. == We need to have the Generator serviced to adjust the engine and stop the surging
I mention this; because, the generator surging might effect an Apex. The voltage is jumping 2 times per second with the surges. This messes up our UPS. It might mess up your Apex. So check to see if your Generator is tuned and you are getting a steady voltage.
Hope this helps.
Now to remember to schedule someone to come out and tune our Generators. I plan on watching them do it to learn where they make the adjustment. Next time I would like to do it myself. If only I had more time. Right now getting the Fish Farm ready for winter is the number one priority that is taking up all my time.
Jim