no.. just your stock electrical uses about 90 amps
check your voltage after you have upgraded your electrical. you might need a 170a or 200a alt
now i really much doubt that unless he drives with the ac on full blast, headlights on, brake lights lit (like when braking), rear defrosters on, heated seats on, side mirror defrost, and front and rear windshield wiper going full blast
stock alternators was made for the cars electrical anymore and it strains it. adding more batteries only puts more strain on it, it could take 2 years for it to burn out or it can take a week.
2k watts draw around 86a to 100a it only gives you 10a to 25a to run your car.