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Jeep Wrangler YJ
YJ General Discussion
High Output Alternators
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<blockquote data-quote="dkoenitz" data-source="post: 429206" data-attributes="member: 19502"><p>A good pure sine wave inverter is close to 90% efficient. It's Watts_AC/Watts_DC (though it does vary with amount of load). It isn't quite as simple as that though. Your battery (or batteries!) are what really has the ability to handle high peak draw. Alternator mostly tops of the batteries. Massive inverters only draw what they are asked to, but if you try to draw more than the battery+alternator can supply, you start blowing fuses. Nothing I want to do requires high continuous current. I really would like to be able to power some of the tools I have that it would be impractical to buy battery-powered versions of. In most cases, it is more practical to just charge your tool battery bank and use cordless tools, but I don't want to buy a $700 battery miter saw, for insurance. I mean, I do, but I can't justify it. </p><p></p><p>At idle, a 250A alternator gives about ~125A of power. Converted at 90% efficiency and using a large enough inverter gives around 1500W continuous, but assuming the battery(ies) can handle it, the peak draw could be much much higher.</p></blockquote><p></p>
[QUOTE="dkoenitz, post: 429206, member: 19502"] A good pure sine wave inverter is close to 90% efficient. It's Watts_AC/Watts_DC (though it does vary with amount of load). It isn't quite as simple as that though. Your battery (or batteries!) are what really has the ability to handle high peak draw. Alternator mostly tops of the batteries. Massive inverters only draw what they are asked to, but if you try to draw more than the battery+alternator can supply, you start blowing fuses. Nothing I want to do requires high continuous current. I really would like to be able to power some of the tools I have that it would be impractical to buy battery-powered versions of. In most cases, it is more practical to just charge your tool battery bank and use cordless tools, but I don't want to buy a $700 battery miter saw, for insurance. I mean, I do, but I can't justify it. At idle, a 250A alternator gives about ~125A of power. Converted at 90% efficiency and using a large enough inverter gives around 1500W continuous, but assuming the battery(ies) can handle it, the peak draw could be much much higher. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
High Output Alternators
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