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Can my poor alt handle it?
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<blockquote data-quote="HardofWhoring" data-source="post: 8866710" data-attributes="member: 674149"><p>I won't look at your amps in particular, but here's the theory. </p><p></p><p>So let's say 1500watts and 800watts. (=2300watts).</p><p></p><p>2300watts / amp efficiency, which we will use 80%, although you should look for yourself. </p><p>2300 / .8 = 2875watt draw for your amps to produce 2300watts.</p><p></p><p>Divide by operating voltage, 12v off, standard used to be 14.4v running, but it's not all that standard anymore, so maybe your vehicle is different. </p><p>2300 / 14.4 = 199 amps. </p><p></p><p>So when your music is maxed out, and the bass is hitting, it's drawing 199amps. That's on top of what your vehicle is using, (which is generally 40-100 amps depending on if you are using your AC, electric fans, headlights, taillights, radio, cigarette lighters, horns, fuel injection, computers. With AC and electric fans being about 1/3rd each). At absolute max, you would be close to 300 amps draw, but that's overkill, because your amps aren't playing test tones to where there is a constant max draw. </p><p></p><p>The type of music you play matters. Between bass hits, your amp is doing next to nothing, and your alt is charging more than you are using. Generated bass tracks and rap, have less time between. Rock and country has more time between. </p><p></p><p>Now you can do this power from a good single battery (but you're getting close to needing something better). You're not going to get away with it on a stock 130 alt. A battery stores energy, and an alt produces it. If you start playing yours on max, your alt wouldn't keep up, and you're going to slowly start draining battery. You can then turn the volume down, or off, and it will charge back up again. My guess is somewhere in the 15-45 minutes to kill depending on the music. </p><p> You WILL need an upgraded alt for that so that isn't your weak point. Again depending on the music, and assume you are setting those amps at RMS power, then you're probably wanting a 200-250 amp alt. If there is a small difference in price to upgrade, and there's even a whiff you might want something more, than buy that one the first time. An alt is also going to produce that amperage you need. If you listen to your music with the engine off, you need more battery. If you need more power while it's running, you need a larger alternator.</p><p></p><p>For what you want, I wouldn't spend the money on an AGM battery, spend that money on an upgraded alt.</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8866710, member: 674149"] I won't look at your amps in particular, but here's the theory. So let's say 1500watts and 800watts. (=2300watts). 2300watts / amp efficiency, which we will use 80%, although you should look for yourself. 2300 / .8 = 2875watt draw for your amps to produce 2300watts. Divide by operating voltage, 12v off, standard used to be 14.4v running, but it's not all that standard anymore, so maybe your vehicle is different. 2300 / 14.4 = 199 amps. So when your music is maxed out, and the bass is hitting, it's drawing 199amps. That's on top of what your vehicle is using, (which is generally 40-100 amps depending on if you are using your AC, electric fans, headlights, taillights, radio, cigarette lighters, horns, fuel injection, computers. With AC and electric fans being about 1/3rd each). At absolute max, you would be close to 300 amps draw, but that's overkill, because your amps aren't playing test tones to where there is a constant max draw. The type of music you play matters. Between bass hits, your amp is doing next to nothing, and your alt is charging more than you are using. Generated bass tracks and rap, have less time between. Rock and country has more time between. Now you can do this power from a good single battery (but you're getting close to needing something better). You're not going to get away with it on a stock 130 alt. A battery stores energy, and an alt produces it. If you start playing yours on max, your alt wouldn't keep up, and you're going to slowly start draining battery. You can then turn the volume down, or off, and it will charge back up again. My guess is somewhere in the 15-45 minutes to kill depending on the music. You WILL need an upgraded alt for that so that isn't your weak point. Again depending on the music, and assume you are setting those amps at RMS power, then you're probably wanting a 200-250 amp alt. If there is a small difference in price to upgrade, and there's even a whiff you might want something more, than buy that one the first time. An alt is also going to produce that amperage you need. If you listen to your music with the engine off, you need more battery. If you need more power while it's running, you need a larger alternator. For what you want, I wouldn't spend the money on an AGM battery, spend that money on an upgraded alt. [/QUOTE]
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Can my poor alt handle it?
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