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Old 02-19-2013, 08:49 PM   #15
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Can it be used with Lithium? Or is the jury still out on that.
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Old 02-19-2013, 08:50 PM   #16
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Could I use a step down 12v to 24v 40 amp converter
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Old 02-19-2013, 08:51 PM   #17
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I mean 24v to 12v
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Old 02-19-2013, 09:48 PM   #18
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Can it be used with Lithium? Or is the jury still out on that.
As far as I know the jury is still out, till the price for lithium gets below $500 each for at least a 100AH battery.
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Old 02-20-2013, 05:56 AM   #19
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As far as I know the jury is still out, till the price for lithium gets below $500 each for at least a 100AH battery.
To my current knowledge, there are no inverter/chargers that have adequate firmware to properly charge a lithium ion battery. This is due to the constant voltage characteristics of the Li-ion output. The charging sections can not 'read this and by the time they 'see the voltage depletion, the battery is essentially 'dead' and the charger section will not charge it.

AFAIK, Magnum Energy is currently working on a special setting in their control software to deal with this situation, but it is far from ready.
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Old 02-22-2013, 04:03 PM   #20
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Thanks, I wonder if they will make an EPROM update as well for the old trace
Stuff
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Old 02-22-2013, 06:54 PM   #21
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Given the problems with larger Lithium Ion batteries catching on fire, I think it will be a while before they are either safe or cost effective for airstream use. They are still working on issues with vibration, temperature sensitivity and chemistry. What works ok for your cell phone or laptop can be dangerous if you scale it up and it combusts.

Tesla seems to have figured it out - but Fiskar and Boeing seem to really be struggling...
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Old 02-23-2013, 01:16 AM   #22
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I noticed that Lithionics sells 12volt lithium batts for RV's. Are these not dependable ?
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Old 02-23-2013, 08:14 PM   #23
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I noticed that Lithionics sells 12volt lithium batts for RV's. Are these not dependable ?
I was involved with Lithionics last year. AM Solar did an extensive test on their batteries with the hope that they would be applicable for RV solar use. There were major problems with their hardware and electronics and as I previously mentioned, there currently are no RV charging systems that will recognize the unique characteristics of the Li-ion battery discharge.

They simply aren't there yet! AT least not in this field...........
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Old 02-23-2013, 09:24 PM   #24
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My 4024 was bought in 1999, hardly used. Tied with 8 L16 Rolls Surrettes 350 amp hour batts for residential backup. The batts are long gone,
Are the components in that inverter better quality
Than the Xantrex version?
I have it mounted with the battery disconnect
Inside a waterproof military shipping container
Water sealed 4/0 cables with Anderson 350 amp
Disconnects. I hate to let it go to waste.
Since it is 24volt, all I would is a step down converter from the batteries to the 12volt mains in the AS correct?
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Old 02-23-2013, 09:24 PM   #25
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Th charge controller is a C-40
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Old 02-23-2013, 10:07 PM   #26
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Even Xantrex made decent stuff then..unlike the Chinese crap that they try to pawn off as good, reliable equipment now.

A 24 to 12 Volt converter might work, but I would worry about the charge voltages being too high and the amperage too low as they would be in 24 VDC usage.

I would certainly test the step-down unit with the inverter on a cheap battery and see how it processes the 3-stage charging cycles before heading to prime time.
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Old 02-23-2013, 10:20 PM   #27
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Thanks for the info
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Old 11-10-2013, 08:16 PM   #28
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We had a similar problem with our inverter. It was overheating, because the fan was not operating, with little or no load on the unit. The manufacturer recommended we replace it. We didn't do that ! One day we smelled smoke ! Guess what was causing the smoke ! Who knows what would have happened if we weren't home ! Yikes ! If you have an inverter that's acting up, get rid of it !
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