Which UPS to get for 2000va

uhm, not really.


UPS's provide SECONDARY surge protection.. (very minimal).

a UPS should never be considered a surge protection device.

It's primarily a battery backup with "some' surge protection thrown in at minimal cost.


surge protection devices are called "SPD's"
They provide ONLY surge protection.
big heavy units that "hum" when switched on (transformer noise)


a single lightning strike will any inline UPS's circuitry AND fry the equipment connected to the UPS in less time than the UPS has to react. (obvious with a constant-regulation UPS's)


UPS's (even APC) provide zero protection against lightning strikes or serious power surges.


I installed many a rack mount / standalone SPD that are in-turn connected to a UPS.


The SPD takes the first (max voltage surge) hit and only passes on voltage levels that the UPS can accommodate.
 
ThatOtherDude said:
I've had more UPS's over the years than I care to mention.
actually, coming to think of it, I have a 3000VA Mistake (Mustek) UPS for sale (just needs 6 x 12V 7.2AH batteries and she's good to go)
Click to expand...
May I take a dibz on that ....

Have an older TESCOM 3.4Kva which was working fine ( purchased used from online )
Batteries started getting tired and so I took in in to a Battery place to have the batteries replaced -- 8 EIGHT 12v x 9aH
However first power out after getting it back ( which was a week or two later ) it started throwing a fault indicating a problem with the battery switch over. No idea if this is just old age or if the battery "technicians" cocked something up ?
Phoned the local agent who told me the unit was too old with NO spares and needed to be thrown away and a new unit purchased.
Have taken it to only local electronics repair facility I could find -- unfortunately they did not have the skill to locate the problem and TESCOM were NOT forthcoming with any schematics or workshop manuals.
Where I am the power goes down regularly without ANY warning so I REALLY need a working UPS

Would ideally like to get a proper inverter system and one of those special surge protection units
Some day when all the various demands on the piggy bank have been sorted out.
 
ThatOtherDude said:
uhm, not really.


UPS's provide SECONDARY surge protection.. (very minimal).

a UPS should never be considered a surge protection device.

It's primarily a battery backup with "some' surge protection thrown in at minimal cost.


surge protection devices are called "SPD's"
They provide ONLY surge protection.
big heavy units that "hum" when switched on (transformer noise)


a single lightning strike will any inline UPS's circuitry AND fry the equipment connected to the UPS in less time than the UPS has to react. (obvious with a constant-regulation UPS's)


UPS's (even APC) provide zero protection against lightning strikes or serious power surges.


I installed many a rack mount / standalone SPD that are in-turn connected to a UPS.


The SPD takes the first (max voltage surge) hit and only passes on voltage levels that the UPS can accommodate.
Click to expand...
Man, what you are talking about? I didn't mention lightning strikes. I am talking about fluctuation of power well below SPD trigger levels. Undervoltage spikes are equally dangerous as overvoltage. Fluctuations of power can confuse any power regulators. Question is whether UPS will magnify turbulations instead ot filtering it out. When UPS (esp. online) blows everything it should protect and survive, there is something wrong with design. Unfortunately it is seen in many cases, it is why you should treat this APC with respect.

Give me that damn blown UPS and stop talking nonsense. :)
 
in my experience almost every data center, high site comm room, POP or remote location I've ever worked on/in have had (some or all):

a) lightning arrestors
b) voltage stabilizers
c) surge protectors
d) rectifiers/inverters/battery banks
e) generators


Once the electricity supply quality into the facility/room has been safeguard THEN and ONLY THEN do I even think of considering battery backup in the form of a UPS.

I only consider UPS if a "graceful shutdown" is required.

No graceful shutdown requirement = no UPS.



a small UPS in a home situation is in my opinion a complete & utter waste of time/money.

I list small home UPS's right up there with inkjet multi function printers that refuse to scan once you've run out of Cyan Ink.

AKA - it sounds like a good idea but over time it costs a fortune & is good only for the supplier's bottom line.


PS: you sound like you work for APC?

:-)
 
Hi. Do you still use a ups with this setup? Looking to run some retail pos pcs for afeaours. Thanks
 
Hi. Do you still use a ups with this setup? Looking to run some retail pos pcs for a few hours. Thanks
 
Thanks! Don't you rmachines go down when the power goes off or are you permanently running them off the batteries with the the inverter and batteries are alway on charge?
 
ThatOtherDude said:
So after bumping my head repeatedly against the "UPS wall" I decided to I invest in 2 x 150AH AGM deep cycle batteries and an inverter.
Click to expand...

Care to share where you got your batteries and Chinese inverter and how much you paid? Sounds like a good setup and I'm interested in a similar one...
 
ThatOtherDude said:
I've had more UPS's over the years than I care to mention.

currently sitting with an utterly useless 3000VA Mistake (Mustek) UPS that needs 6 x batteries AGAIN..

I tossed a 1500VA APC Smart USP (rack mount) that blew a fuse or cap or popsickle??

APC UPS's are like Bentley's.
Fantastic when they break inside of motor plan.
Large heavy paperweights when they break outside of motor plan.


a UPS is fantastic if you want to manage graceful shutdowns that stop your RAID5 array from corrupting after a power failure but they're UTTERLY USELESS if you actually want to get some work done. (hours behind a keyboard, scanning & printing documents, while connected to the web)

& forget running a laser printer off a small UPS.
They just beep and shut down.
too much current.


So after bumping my head repeatedly against the "UPS wall" I decided to I invest in 2 x 150AH AGM deep cycle batteries and an inverter.

(added another 120AH battery later with a 130W solar panel + charger)

my heavy as *&^% battery babies now live comfortably in the garage & run my PC's (3), monitors AND fridge AND freezer AND 42" TV AND ONT AND router AND laser AND inkejt MFP - for an entire day (sun up to sun down).


or, they last the fridge + freezer + TV + streaming PC + internet + another laptop for an entire weekend.


WITH a couple of garage door open/close and 3 x odd coffee machine sessions thrown in for good measure.


actually, coming to think of it, I have a 3000VA Mistake (Mustek) UPS for sale (just needs 6 x 12V 7.2AH batteries and she's good to go)
Click to expand...


Can u post a photo of your setup?
 
when the power fails everything in the house dies.

using a trusty flashlight I connect the inverter output to:
garage motor & light
1 x PC (gaming) + 2 x monitors
a TV (49?" LCD)
1 x streaming PC (win10 - ye 'ol gaming rig)
1 x ONT
1 x router
1 x coffee machine (a USA version running off a 110V transformer nogal)

I have some LED lights that run off a separate 12v 120AH battery. (planning on getting an inverter for this battery too)

Luckily the power in my area doesn't fail very often.
maybe once every 2 or 3 months?

it would be great having an automatic switchover but I'd rather spend money on additional batteries/solar panels/inverters before I spend money on an electrician to come hook it all into my home grid.
 
ebendl said:
Care to share where you got your batteries and Chinese inverter and how much you paid? Sounds like a good setup and I'm interested in a similar one...
Click to expand...



http://www.rsasolarandelec.co.za/
in Randburg.

I'm still not 100% certain that some of their AGM deep cycle batteries didn't fall off the back of a truck.
The ones I bought look A LOT light the ones installed in Telkom high sites.
Mine did appear to be brand new(ish) though.
maybe they fell off (the truck) en-route to a high site.

these guys do solar installations in the week and run a church on Sundays.
:-)

I think they're from Malawi?
 
ThatOtherDude said:
when the power fails everything in the house dies.

using a trusty flashlight I connect the inverter output to:
garage motor & light
1 x PC (gaming) + 2 x monitors
a TV (49?" LCD)
1 x streaming PC (win10 - ye 'ol gaming rig)
1 x ONT
1 x router
1 x coffee machine (a USA version running off a 110V transformer nogal)

I have some LED lights that run off a separate 12v 120AH battery. (planning on getting an inverter for this battery too)

Luckily the power in my area doesn't fail very often.
maybe once every 2 or 3 months?

it would be great having an automatic switchover but I'd rather spend money on additional batteries/solar panels/inverters before I spend money on an electrician to come hook it all into my home grid.
Click to expand...


So if i just wanted to jkeep a few pcs running I could hook this sytem up to a ups?
 
ThatOtherDude said:
So after bumping my head repeatedly against the "UPS wall" I decided to I invest in 2 x 150AH AGM deep cycle batteries and an inverter.
Click to expand...

I was thinking of doing almost exactly the same thing, but I am not 100% sure what inverter to get.

What inverter did you go for?

FFMG
 
ThatOtherDude said:
http://www.rsasolarandelec.co.za/
in Randburg.

I'm still not 100% certain that some of their AGM deep cycle batteries didn't fall off the back of a truck.
The ones I bought look A LOT light the ones installed in Telkom high sites.
Mine did appear to be brand new(ish) though.
maybe they fell off (the truck) en-route to a high site.

these guys do solar installations in the week and run a church on Sundays.
:)

I think they're from Malawi?
Click to expand...


..... definitely fell off a truck ;)

Sounds as if your set up is just right for a few of us :) I'm also waiting for pics.

Can the house alarm be connected? Ours has battery backup but it runs out in an hour or two.
 
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