Battery good! car doesn't start, no electric power inside, only brakes light,why

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while I was driving at night, I turned and all the power went off, everything!! no light inside, nor panel, does not want to start, Ihave to push the car to move it, but battery is good!! and have brake lights but not even when I open the door no lights at all!! we check the fuses,, all good,, we don't know what is wrong....