UPS calculation....

[ired]

now i am wonder to know the calculation of UPS 500 VA, how it can get 500VA. please reply this soon...

 

[audioguru2]

Hi Ired,
What do you need to calculate?
Do you want the output to be square-wave or sine-wave?
Do you want to use a 12V car battery?

I gave a link to a discussion about a 500W square-wave inverter in your other post.