Background: I have a wireless router ASUS DSL_N12U. Input voltage and current is 12V , 1.5A respectively. I also have an Inverter (works on three modes: Solar, Battery, Mains) at my home.
Problem: What happens is whenever my Inverter switches its power source (From Battery to Mains or Main to Battery), electricity of my home turns off and on for a very short time (although this switching is visible as lights goes off and on). Earlier when the router was directly connected to the inverter, it used to hang up because of this switching and I had to restart in order to connect to it again. So in order to save my router from this voltage switching, I connected the router to a standby UPS (with transfer time approx: 4ms). But the problem is still there as router still hangs up when power switching happens and I have to restart it.
I searched this problem on internet and found that the wireless router's circuit may be very sensitive and connecting it to an Online UPS can work.
My requirement is to have a small online UPS that can power to the router. However I am not able to find such a small online UPS for this purpose.
So Is there any small online UPS available in the market for this purpose? or can I make one? or Is there any device which can be placed in between the router and current standby UPS in order to solve the problem? Any other suggestions/comments are welcome.