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Old 11-07-2012, 06:00 PM   #11
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Originally Posted by herk7769 View Post
Thats definitely crazy expensive...but not $5,800 crazy expensive.

Like I said, I expect this to sort of follow along the lines of what LED lighting technology did and be unaffordable expensive for a while and maybe settle into a more affordable range in the future when its more widespread.
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Old 11-07-2012, 06:04 PM   #12
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I did not make up this $5800 price tag. I got it from one of their distributors.

Large Scale Deep Cycle Batteries

Never said you did. Simply stated that the one you chose to post the price of likely wasn't what we would typically use on our TTs. They have several smaller, less expensive options (more similar to what we use in the Lead acid department for our TTs) . You picked out the largest 12 volt battery they make.

I think the link Herk posted is more along the lines of what we would use.
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Old 11-07-2012, 07:01 PM   #13
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Originally Posted by herk7769 View Post
That's an interesting one with the AC/DC outlets and 300 watt inverter.

Let's assume that the price is fairly standard for these things. Doing a quick and dirty comparison, it supplies 100Ah for $1,580. In comparison two Trojan T-105s provide 225Ah at ~$280 for the pair.

But, if its true that these lithium can be safely drawn down 80%, than that battery is equivalent to 160Ah in a regular flooded deep cycle battery (using only 50% capacity).

True, the lithium should last longer over the years but I'm not calculating for that now because we really don't know how many more cycles it has.

If I am doing my math correctly comparing just $/Ah, that lithium is roughly 8 times the cost ($1,580/($280/225)*160) of two 6-volt Trojans. Ouch!

That would make this a very expensive proposition. Of course the lithium in this example provides extra features like the outlets, inverter, maintenance-free, longevity, etc. But still. That's a big price hole to dig out of.

I would need to really think this through (and make sure the "quick & dirty" calculation is correct and include the other benefits of lithium), but it appears to me that the cost of those lithiums currently outweigh their benefits (by a lot) compared to a standard flooded.

(I apologize for the rough price comparison and everyone should feel free to rip it apart )
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Old 11-07-2012, 07:03 PM   #14
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All that said; I love the technology. I can't wait for the prices to become "reasonable" as Lithium Ion has a LONG shelf life. Might be one or several in my future if I live long enough.
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Old 11-07-2012, 07:05 PM   #15
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True that!! That part of the industry just needs scale and then the prices will drop.
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