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<blockquote data-quote="hispls" data-source="post: 8662132" data-attributes="member: 614752">YesIf the size and weight doesn&#039;t bother you that&#039;s a decent deal for NorthStar AGM.  I&#039;d suggest two of them if you really wanted to keep your voltage solid.Just to get the slow/cheap shipping option.  There&#039;s like 100KG tier that they need to ship by sea.  On the up-side if you pay for &quot;express&quot; shipping they&#039;re delivered to your door in like a week (I waited nearly 6 weeks).Considering there&#039;s absolutely no way in Hell you&#039;re getting 370A real world and you still have to run the car, charge your actual batteries and continue to feed the amps assuming you&#039;re playing music I&#039;d say at least 10-15 seconds.   Caps deliver huge surge current really fast and charge really fast but they have rather low storage capacity (for our purposes anyway) and you&#039;re still limited by how quick you can really charge them.  Consider also you&#039;re probably not charging them up to 15.5V so you&#039;re leaving a bit on the table when comparing with a true full charge.One way to find out....Not really.  Conventional wisdom with AGM is you want one 55AH size battery per 1000W to hang really strong.   As far as various flavors of lithium it&#039;s very dependent on &quot;C Rating&quot; of the cells, and of course it comes down to your listening habits and other unique install dependent factors.  &nbsp; &nbsp; If you use dual alt there&#039;s no reason to not have them parallel to your battery/cap bank/system/vehicle unless you plan to run 18V to your amp.  I&#039;d say dual HO alts, a solid AGM under the hood, and cap bank would keep your voltage rock solid.  If you can easily find/build dual alt bracket this would probably be your best option for being able to draw as much current as that amp ever needs until you run out of gas to keep the alternators spinning and taking up the least amount of space.</blockquote>

[QUOTE="hispls, post: 8662132, member: 614752"] Yes If the size and weight doesn't bother you that's a decent deal for NorthStar AGM. I'd suggest two of them if you really wanted to keep your voltage solid. Just to get the slow/cheap shipping option. There's like 100KG tier that they need to ship by sea. On the up-side if you pay for "express" shipping they're delivered to your door in like a week (I waited nearly 6 weeks). Considering there's absolutely no way in Hell you're getting 370A real world and you still have to run the car, charge your actual batteries and continue to feed the amps assuming you're playing music I'd say at least 10-15 seconds. Caps deliver huge surge current really fast and charge really fast but they have rather low storage capacity (for our purposes anyway) and you're still limited by how quick you can really charge them. Consider also you're probably not charging them up to 15.5V so you're leaving a bit on the table when comparing with a true full charge. One way to find out.... Not really. Conventional wisdom with AGM is you want one 55AH size battery per 1000W to hang really strong. As far as various flavors of lithium it's very dependent on "C Rating" of the cells, and of course it comes down to your listening habits and other unique install dependent factors. If you use dual alt there's no reason to not have them parallel to your battery/cap bank/system/vehicle unless you plan to run 18V to your amp. I'd say dual HO alts, a solid AGM under the hood, and cap bank would keep your voltage rock solid. If you can easily find/build dual alt bracket this would probably be your best option for being able to draw as much current as that amp ever needs until you run out of gas to keep the alternators spinning and taking up the least amount of space. [/QUOTE]

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