possible electric setup, what you guys think?

[RollinOn23z 1]

The alt is mechman 250amp adjustable voltage and the battery is xspower d1400 14v. I know that there is no definite answer but do you guys think that this would be sufficient to power 3 amps? (saz 3000d a jl 500/5 and a jl e4300) Maybe make it two batteries? Better alt?(recommendation for 1)

[johnecon2001 82]

To charge that 14v battery, you need to have your voltage above 15v... You can't use it as your one and only battery for the vehicle.