So I have been told that if you dont have the Ratio?

A mismatched pulley ratio and alternator will be no good at idle speeds the alternator RPM is not necessarily the same as engine RPM the ratio between the two pulleys diameters. I was going to get the alternator today and they asked me what ratio.
Is this true??

I have a 235 and I want to generat at lest 24 Amps. I will be runing 24 Amps of Commercial refrigeration so I was going to go with a 200 Amp alternator and 5000W Power Inverter With Battery Charger that will give me 30 Amps.
Is this the best way to go??

all of your replies and feed back will be of help
Thanks
Maxx


52 GMC Grumman Olson Kurb Side stepvan T3-8(Comet)69 GMC 1/2-ton