![]() So far there hasn't been a "right sized bear" shore charger in terms of charge settings, so he just bought a Victron portable 15 amp smart charger (he doesn't need a shore charger much) for now, figuring newer chargers would come out in time. So he just wanted a straight shore charger (plus a modified sine wave 1500 watt stand-alone inverter for occasional use). ![]() (They may tend to have more adjustability?). One of the issues for him is that although he had a big Magnum charger/inverter in his last setup (he changed RV's), he found that he's using much less in the way of inverter or big Peukert loads, so didn't really have a need for one. It was a bit easier with solar controllers to find ones that would work well. And some "lithium" settings either aren't, or seem to reflect older thinking. One thing we found is that a number of chargers (especially shore chargers) don't let you lower the absorb time to basically nothing, even in custom settings. Obviously this means that easily adjustable chargers are key. That apparently makes sure all the cells have time to balance (again, lots of IIRC here). Then, once a month or so, he would let them absorb for a longer time (one or two hours, IIRC). it basically gets to that point and stops). bulk stopping point) to (IIRC), 14.1 or 14.2, and the absorb time for one minute. Also, it has become known that they are rather sensitive to heat (that's older news though).īetween consulting with Victron, and reading what I could find elsewhere, we came up with the plan that he would set his absorb point (i.e. Thus, he's getting up to 100% fairly often and not discharging very deeply.Īnother thing I seemed to notice in my reading is that charging recommendations for this type of lithium bank keep going down (lower bulk ending point, less absorption time, lower voltage float). My buddy still has a bit of "lead-acid brain," so he bought a larger bank than he probably needed. And also, like you say, that the charging is basically bulk right up until it's done (no more sitting in absorb for hours!). OTOH as usual their kit is spiffy and nice to work with.Īnyway, my understanding, like yours, is that they don't necessarily "want" to get up to 100% all the time like lead acid batteries prefer. I imagine what is "known" is changing, and that must be part of it, but it was still annoying. but it was different in every place you found it! I helped a friend put in a lithium system over the winter and even though he bought a premium brand (Victron), I was a bit frustrated about the charging guidance (I'm spoiled by the Lifeline Battery Manual which tells you everything, in great detail, complete with graphs and charts - that way if you want to treat your batteries well, all you have to do is follow the guidelines). OTOH, it's a kind of natural thread morph. Just a warning that this isn't about separators clicking.
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