work2much wrote:
Can you give me an example of a unit that can charge at 100Ah and is programable for specific bulk, absorption and float voltages for my LFP? , Serious question I am interested. Also looking at a voltage drop calculator I would need 4/0 cable to stay under 3% line loss with such low voltage and high amperage. That is heavy and expensive. Weight isn't my friend..
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Edit: Sorry Greg, I didn’t realize until after I posted this that the CTEK charger referenced below does NOT support lithium batteries. Kinda surprising considering it’s price.
I’ll leave the info in case someone finds it useful.
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Have you looked at CTEK DC-DC chargers? Specifically, this bundle?
CTEK 140A Off Grid BundleI remember looking at the CTEK brand when I was looking for a DC-DC charger for my TC. You and I are at opposite ends of the spectrum in terms of charging capacity needs. I very quickly ruled this bundle out because I don’t need 140 amps of charging for one group 31 AGM battery, and the price was way out of my budget anyway (to say the least).
CTEK is also pretty much across the board more expensive than every other brand. I got the impression they are considered top notch, though. The Redarc 25 amp charger was a little cheaper than the CTEK 20 amp, and they seem to have a very good reputation as well, so I went with the Redarc.
I took a quick look through the manual for this CTEK bundle, specifically looking for the recommended wire sizes. There are several wires associated with these two units, and depending on which one your talking about and how long it is determines the wire size. Worst case though, at lengths out to 30’ I see no recommendation for wire any bigger than 1AWG.
Just thought I’d make sure you knew about this. I totally forgot about the potential to combine these two units and get 140 amps output.
:):)
