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Hi Output Alt or Extra Batteries?
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<blockquote data-quote="LetMyBeatPound" data-source="post: 8596497" data-attributes="member: 673630"><p>How is the proper way to calculate amperage draw?</p><p></p><p>RMS x Efficiency / Voltage</p><p></p><p>Or</p><p></p><p>Peak Power x Efficiency / Voltage</p><p></p><p>And if my combined RMS of my subs is 1500w should I go by that?</p><p></p><p>I also found another formula that says this is the correct way:</p><p></p><p>RMS x 1.335 x Efficiency x Voltage</p><p></p><p>Because I believe I calculated wrong, 180amp draw seems high.</p><p></p><p>I was using 65% to 70% for my Efficiency but idk if that is correct either. Any help in this area would be appreciated. Also I didn't find any alternator for my ride @ mechman, excessive, us alternator, or the singer sites. Only things I found was that EBAY junker( all neg feedback was about alternators for that seller ) and I call this auto part warehouse seller/distributor and he qouted me $125+$20 for a 200 amp/ 100@ idle... But the price makes me a bit skeptical.</p></blockquote><p></p>
[QUOTE="LetMyBeatPound, post: 8596497, member: 673630"] How is the proper way to calculate amperage draw? RMS x Efficiency / Voltage Or Peak Power x Efficiency / Voltage And if my combined RMS of my subs is 1500w should I go by that? I also found another formula that says this is the correct way: RMS x 1.335 x Efficiency x Voltage Because I believe I calculated wrong, 180amp draw seems high. I was using 65% to 70% for my Efficiency but idk if that is correct either. Any help in this area would be appreciated. Also I didn't find any alternator for my ride @ mechman, excessive, us alternator, or the singer sites. Only things I found was that EBAY junker( all neg feedback was about alternators for that seller ) and I call this auto part warehouse seller/distributor and he qouted me $125+$20 for a 200 amp/ 100@ idle... But the price makes me a bit skeptical. [/QUOTE]
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