Beeping UPS on Genset power?

Mortymoose

Mortymoose

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Greetings ......

First time generator user here,

Power been off for four hours, I fired up my new 5.5ka generator....
Turned on the two UPS in lounge...
My printer,phone and router all run from same plug but not through UPS..
Pc came on , no problem, so did router,printer..
Three min later UPS starts beeping, the odd click....

The other UPS on a different plug circuit doing the same...

What gives?
Do i just bypass my UPS and mess my pc's up?
Do I hang tight, use my PC's and entertain the beeping?
Who else has this!

Whats the point of buying a genset if you cannae run your network?

I thank you...
 
Some more expensive ups have a generator setting, this makes the voltage/ frequent range it accepts as ok wider
 
thehuman said:
Some more expensive ups have a generator setting, this makes the voltage/ frequent range it accepts as ok wider
Click to expand...

Thanks for that!

I left the one non ssd pc on the beeping ups.... For an hour...then beeping went crazy, i felt the Ups, could have fried an egg on it.... Needless to say I turned it off....
 
But don't modern Generators have AVR, so it shouldn't be a problem?

For the record I have the same problem, hence why don't use my generator when the power goes out, since my UPSs also go haywire.
 
A cheap power generator gives very unstable output (amplitude and frequency variation). UPS can pickup a noise and start constant switching between backup and a normal mode.

Good for powering your fridge, not a sensitive electronic devices.
 
Last edited:
I found a similar problem when the load on the generator was very low (like 1kw or below). Turning on some aircons resolves the issue.
 
So there is no after market AVR that can retrofitted to solve this problem?
 
Grubscrew said:
So there is no after market AVR that can retrofitted to solve this problem?
Click to expand...
My generator has avr.

My theory is that at low loads, sometimes the engine goes a little above 3000rpm, so the frequency goes a little high which triggers the UPS.
I have not proven this - I need to find a cable to plug into the UPS sometime and see.
 
Sinbad said:
My generator has avr.

My theory is that at low loads, sometimes the engine goes a little above 3000rpm, so the frequency goes a little high which triggers the UPS.
I have not proven this - I need to find a cable to plug into the UPS sometime and see.
Click to expand...
Thanks will see if I can get the load a bit high perhaps and see what will happen. I think it is a 2.5kw. So I probably closer upto 2.0kw up here will. Only have a pc, TV, fridge running and a few lights, UPS goes totally wild when I run the generator.
 
I doubt your 2.5 has avr though... not sure what you can retrofit?
 
Sinbad said:
I doubt your 2.5 has avr though... not sure what you can retrofit?
Click to expand...
It said that on the box it came with and has a volt meter on the panel and measuring it with a multimeter it is putting out 230v.
 
Your UPS is most probably set to output 230Volts.

Your generator is maybe? outputting between 220V and 230V (variable)


Call it 5V - 10V AC difference.

The UPS is supplementing that difference from its own battery.

Once it (the UPS) reaches it's battery limit (supplementing that X voltage for Y minutes) it starts beeping.




either:

a) change the output voltage of your genset (increase it to 230V or 240V)

d) decrease the output voltage of your UPS to 220V


voltage into the UPS should be ever so slightly higher than the UPS output voltage, (if you don't want to run down the battery in the process)
 
ThatOtherDude said:
Call it 5V - 10V AC difference.

The UPS is supplementing that difference from its own battery.
Click to expand...
Nope. I doesn't work that way. There is no supplementing of power. It is either standby (power comes from mains outlet) or a backup mode (full power delivered from the battery).
 
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