Make my own UPS with my inverter ?

Hello,

I am having AC cycle drop apparently. My computer does not like it very much I think.

I was hoping to solve the issue by creating my own UPS with my inverter system permanently connected to the charger at the same time as the battery so everything wired in parallel.

I have a deep cycle AGM battery 100A/H with a 1500w pure sine wave inverter.

Would that work, is it safe ?
I have a very good intelligent charger AGM specific so hopefully that should be ok ?

Would it impact my electricity consumption ?

Sorry for all the questions, any help is appreciated.
Thank you,

Normally PSU has a holdup time of 1 cycle but depending on your load and nominal input voltage, and other factors, and your's may be oversensitive.

Can you test your UPS with a charger for transient line interference?
Can you scope Power OK signal?

My 2nd choice is to get a PSU with twice the capacity so it has a longer holdup time.
My 3rd choice is swap PSU. You may have a one with low margin.

SunnySkyguy said:

Normally PSU has a holdup time of 1 cycle but depending on your load and nominal input voltage, and other factors, and your's may be oversensitive.

Can you test your UPS with a charger for transient line interference?
Can you scope Power OK signal?

My 2nd choice is to get a PSU with twice the capacity so it has a longer holdup time.
My 3rd choice is swap PSU. You may have a one with low margin.

Click to expand...

Sorry but I do not have any UPS. I would like to make one using my inverter connected to both battery and charger at the same time so the battery takes over if any cycle drop appears at the charger end.
Is it possible ?

To your question; yes, you can make a homebrew UPS like this:

AC => charger => battery => inverter => computer.

But your electric consumption will increase significantly. Every additional energy conversion step (and that includes the battery) adds energy losses.
In critical computer applications, those losses are tolerated as a tradeoff for computer uptime.

schmitt trigger said:

To your question; yes, you can make a homebrew UPS like this:

AC => charger => battery => inverter => computer.

But your electric consumption will increase significantly. Every additional energy conversion step (and that includes the battery) adds energy losses.
In critical computer applications, those losses are tolerated as a tradeoff for computer uptime.

Click to expand...

Thank you very much

The extra consumption should be related to the efficiency of my inverter which is 80% or is there anything else ? The charger should be minimal ?

Battery charger will have some current and voltage regulation losses depending on type.