question about FLOW of electricity....

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
It depends on the UPS. If its a 'real' online "double Conversion" UPS, where the utility power only charges batteries, the UPS always runs on batteries and doesn't 'switch' (with a manual override for emergency operation without the internal inverter) quickly to utility power when it senses a utility fault.
View attachment 335324

Then maybe (the online UPS runs OK with modified sine wave input power).

It's unlikely you will ever save money on electrical energy with Solar panels but you might gain reliability for those critical loads.
very well said but since the power brick has 180 watts written on it.. am i right to assume that i only need 200 watts of solar power for JUST the laptop ? so unless math just goes completely alien in this circumstance.. ups plugged into dc to ac inverter... laptop plugged into ups.... no warp core reactor here... no need for scotty the engineer or a blind black dude with a French name... wow that actually sounded racist :p Levar Burton played him on star trek with the British captain... sir Patrick..... something :l .. you all know i will google this after i press post....

PS.. just to mention there is 2 ethernet ports in the back of this ups... dont know if this makes it interactive or i dont know
and it did come withg a printer to usb cable but im not certain what to do with i
 

nsaspook

Joined Aug 27, 2009
16,359
very well said but since the power brick has 180 watts written on it.. am i right to assume that i only need 200 watts of solar power for JUST the laptop ? so unless math just goes completely alien in this circumstance.. ups plugged into dc to ac inverter... laptop plugged into ups.... no warp core reactor here... no need for scotty the engineer or a blind black dude with a French name... wow that actually sounded racist :p Levar Burton played him on star trek with the British captain... sir Patrick..... something :l .. you all know i will google this after i press post....

PS.. just to mention there is 2 ethernet ports in the back of this ups... dont know if this makes it interactive or i dont know
and it did come withg a printer to usb cable but im not certain what to do with i
What model UPS is it? Instead of guessing, we could know for sure.
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
so good purchase ? thank you, i needed that reasurance....

is interactive bad ? i just wanna make sure that it can filter the nasties that come through the wall... i wanna plug in and have zero stress while i play hard, i deserve as much...
 

nsaspook

Joined Aug 27, 2009
16,359
so good purchase ? thank you, i needed that reasurance....

is interactive bad ? i just wanna make sure that it can filter the nasties that come through the wall... i wanna plug in and have zero stress while i play hard, i deserve as much...
No, line interactive is not bad, it's just not the best at near total isolation from the utility like double conversion would be. I have both types in the house.
1731270750611.png

MGE: double conversion, industrial quality UPS for critical server and networking loads.
Amazon Commercial: Line interactive, for importland loads.
CyperPower: Line interactive, Standby UPS, in case of UPS failure.
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
not double ? does it mean i dont get pure sine when plugged in and on built in battery ???
from what little i know if power is cut off to the ups theres a relay that makes it jump to battery as power source...
is that what you are referring to ???
 

nsaspook

Joined Aug 27, 2009
16,359
not double ? does it mean i dont get pure sine when plugged in and on built in battery ???
from what little i know if power is cut off to the ups theres a relay that makes it jump to battery as power source...
is that what you are referring to ???
Most of the line-interactive UPS will also act as a AVR so it may modify (cleanup) the input power to some extent but yes,
It means, if the power input is a modified sine to the line-interactive inverter, it won't have a pure-sine output until you lose power and it switches to full battery backup mode.
 
Last edited:

nsaspook

Joined Aug 27, 2009
16,359
I want to add that traditionally, the current direction is determined from the positive to the negative pole, which historically stems from the assumption of the movement of positively charged carriers. However, in fact, in metals, the main charge carriers are electrons, which move in the opposite direction - from the negative to the positive pole.
OK ...
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
I want to add that traditionally, the current direction is determined from the positive to the negative pole, which historically stems from the assumption of the movement of positively charged carriers. However, in fact, in metals, the main charge carriers are electrons, which move in the opposite direction - from the negative to the positive pole.
thank you, i remember that there are other theories that in DC some people believe that power flows from negative to positive but im not one of those :)
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
Most of the line-interactive UPS will also act as a AVR so it may modify (cleanup) the input power to some extent but yes,
It means, if the power input is a modified sine to the line-interactive inverter, it won't have a pure-sine output until you lose power and it switches to full battery backup mode.
thats great but id like to know for those momements when im on "battery mode" is that power also pure sine wave ?
 

nsaspook

Joined Aug 27, 2009
16,359
thats great but id like to know for those momements when im on "battery mode" is that power also pure sine wave ?
Yes, battery mode is when the battery is delivering power, so if the UPS is a pure sine, that's you get it. A double conversion UPS (like my MGE) is always on battery.

https://www.kesintisizservis.com/pdf/MGE/MGE_UPS_PULSAR_EX30_manual.pdf

Linux NUT ups manager

upsc mge_SMA2
Init SSL without certificate database
battery.charge: 100.0
battery.charge.low: 20
battery.runtime: 04644
battery.voltage: 109.5
battery.voltage.nominal: 096.0
device.mfr: MGE UPS SYSTEMS
device.model: Pulsar EX 30
device.type: ups
driver.debug: 0
driver.flag.allow_killpower: 0
driver.name: mge-utalk
driver.parameter.pollinterval: 20
driver.parameter.port: /dev/ttyS0
driver.parameter.synchronous: auto
driver.state: quiet
driver.version: 2.8.1
driver.version.internal: 0.95
input.frequency: 60.00
input.voltage: 122.5
output.current: 002.8
output.voltage: 121.0
ups.delay.shutdown: 120
ups.delay.start: 000
ups.firmware: 5
ups.id: Pulsar EX30 5
ups.load: 013.0
ups.mfr: MGE UPS SYSTEMS
ups.model: Pulsar EX 30
ups.status: OL CHRG
ups.test.interval: 10080
 
Last edited:

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
No, line interactive is not bad, it's just not the best at near total isolation from the utility like double conversion would be. I have both types in the house.
View attachment 335518

MGE: double conversion, industrial quality UPS for critical server and networking loads.
Amazon Commercial: Line interactive, for importland loads.
CyperPower: Line interactive, Standby UPS, in case of UPS failure.
looking at this photo, do you have only 1 electric input for all those 3 ups ? i mean i still have the intex ups.. it puts out 390 watts max of modified sine wave... from wall to 30$ ups from that to 200$ ups... then to kickass laptop ? does that really do anything ???? other than extra time if the electrical grid shuts down.. which isnt as frequent as i imagined....
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
Yes, battery mode is when the battery is delivering power, so if the UPS is a pure sine, that's you get it. A double conversion UPS (like my MGE) is always on battery.

https://www.kesintisizservis.com/pdf/MGE/MGE_UPS_PULSAR_EX30_manual.pdf

Linux NUT ups manager

upsc mge_SMA2
Init SSL without certificate database
battery.charge: 100.0
battery.charge.low: 20
battery.runtime: 04644
battery.voltage: 109.5
battery.voltage.nominal: 096.0
device.mfr: MGE UPS SYSTEMS
device.model: Pulsar EX 30
device.type: ups
driver.debug: 0
driver.flag.allow_killpower: 0
driver.name: mge-utalk
driver.parameter.pollinterval: 20
driver.parameter.port: /dev/ttyS0
driver.parameter.synchronous: auto
driver.state: quiet
driver.version: 2.8.1
driver.version.internal: 0.95
input.frequency: 60.00
input.voltage: 122.5
output.current: 002.8
output.voltage: 121.0
ups.delay.shutdown: 120
ups.delay.start: 000
ups.firmware: 5
ups.id: Pulsar EX30 5
ups.load: 013.0
ups.mfr: MGE UPS SYSTEMS
ups.model: Pulsar EX 30
ups.status: OL CHRG
ups.test.interval: 10080
yes sorry, what im trying to ask from the ups model that i provided.. WHEN it is on battery.. is the power output pure sine wave as well ???
 

nsaspook

Joined Aug 27, 2009
16,359
looking at this photo, do you have only 1 electric input for all those 3 ups ? i mean i still have the intex ups.. it puts out 390 watts max of modified sine wave... from wall to 30$ ups from that to 200$ ups... then to kickass laptop ? does that really do anything ???? other than extra time if the electrical grid shuts down.. which isnt as frequent as i imagined....
I have power from the utility and from solar for the house networking and processing rack that uses a bit of power. In the winter we get nasty snow and ice storms that glitch (I've had the line-interactive UPS completely lockup and die) power like mad. Most of the servers and vital network switches have redundant power supplies, with one directly on the utility or solar and the other on the UPS. The means there is plenty of time for the system to detect a blackout and do a orderly shutdown.
1731425114747.png
1731424882055.png
 

WBahn

Joined Mar 31, 2012
32,942
I want to add that traditionally, the current direction is determined from the positive to the negative pole, which historically stems from the assumption of the movement of positively charged carriers. However, in fact, in metals, the main charge carriers are electrons, which move in the opposite direction - from the negative to the positive pole.
Irrelevant. Current is about the flow of charge, not charge carriers. People that confuse the two and use "electron flow" have to embed magical-mystery-minus signs throughout their work to get things to work out. They do this subconsciously without even realizing it.
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
okay simply to give you a visual.. I have electricity going from the wall to an intex ups, which can provide 390 watts of modified sine.... The new ups is plugged into the back of the intex ups.. the new ups supposedly give pure sine, is this good??? I had another ups very Chinese in the last apt, but I stopped using it when I noticed the ups battery stayed at 3.9v, which is exactly why I told myself to not open them anymore..... triple ups-ception, there's a joke in there somewhere.....
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
WHEN it is on battery, the output power type depends on the type of inverter. If it's a pure sine wave inverter, that's what you get.
my apologies i was under the impression its a separate inverter because its switching from ac input to dc input(batteries are typically dc, thank you mr Tesla)
 

Thread Starter

corporal_Canada

Joined Oct 17, 2024
138
I have power from the utility and from solar for the house networking and processing rack that uses a bit of power. In the winter we get nasty snow and ice storms that glitch (I've had the line-interactive UPS completely lockup and die) power like mad. Most of the servers and vital network switches have redundant power supplies, with one directly on the utility or solar and the other on the UPS. The means there is plenty of time for the system to detect a blackout and do a orderly shutdown.
View attachment 335626
View attachment 335623
Jesus, i thought the only 2 places that got butthurt during winter was Alaska and Wisconsin (yes i did the funny accent)
in Canada you really need to harden the F up if you wanna go outside to buy your smokes and get a dbl dbl from timmies if its -20C outside
 
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