Can you help me for my car audio?

I am having the following car audio products:- 1. Pioneer Subwoofer (TS-W306C) 2. Pioneer speakers 460W 3.Alpine V12 4channel Amp 5400W(MRV-F806) Right now i m running them on my inverter battery in my home. But the sound of speakers with woofer are not as good as they were in car. And when woofer is a... show more I am having the following car audio products:-
1. Pioneer Subwoofer (TS-W306C)
2. Pioneer speakers 460W
3.Alpine V12 4channel Amp 5400W(MRV-F806)

Right now i m running them on my inverter battery in my home.
But the sound of speakers with woofer are not as good as they were in car. And when woofer is a little louder, the light on amp dims out with beats. And also the speakers produce fizz volume

Is there some better way to supply power to amp?
Update: in my country the power supply is 240V 50hz
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