UPS power switching problem

[small2cats]

Alright I need some help deciding which inverter to get. Now I've narrowed it down to 2. Since my battery is 12V 48A, a 600W inverter would be appropriate, so I picked out these two

http://www.cpsww.com.pk/products/accessories/eps/cps1000ei.htm

http://www.cpsww.com.pk/products/accessories/eps/cps1000e.htm

And I need advice on which one is better. The first one is good but the switching time is 20ms and that seems a tad high. Will it switch in time to support a PC that's drawing 300W?

The second one has better switching time but the on battery output voltage is a trapezoidal sine wave at a load more than 40%. Will that cause any issues with power factor correction in my PSU?

 

Help me decide!

[W-L]

Alright I need some help deciding which inverter to get. Now I've narrowed it down to 2. Since my battery is 12V 48A, a 600W inverter would be appropriate, so I picked out these two

http://www.cpsww.com.pk/products/accessories/eps/cps1000ei.htm

http://www.cpsww.com.pk/products/accessories/eps/cps1000e.htm

And I need advice on which one is better. The first one is good but the switching time is 20ms and that seems a tad high. Will it switch in time to support a PC that's drawing 300W?

The second one has better switching time but the on battery output voltage is a trapezoidal sine wave at a load more than 40%. Will that cause any issues with power factor correction in my PSU?

 

Help me decide!

 

I'm not super familiar with inverter units but for that second one I wouldn't choose that one since it has this note at the bottom, you want pure sinewave ideally or simulated/stepped sinewave atleast:

 

*0~40% LOAD Pure Sinewave; 40~100% LOAD Trapezoidal Wave