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Damn. Looks like this thing will maintain a 20 amp charge for maybe 10 minutes, then it drops to around 5 amps for some reason. Lame.

Well, since I just installed this amazing little diesel heater, I'm not concerned about things getting too cold in the van ? Although it has also increased my power consumption, contributing to the need for extra charging (in addition to the weather).

How about something like this?

Just now saw this comment. A lot of what you said is Greek to me, but I just hooked up the battery tender one I posted the picture of above and it has a lithium settings so I'm guessing it's probably fine. I'm also curious about ones like this one on Amazon ( picture below)... Seems they are...

At 20 amps, plugging it in for 10 hours should juice it up to about 200 amp hours, right? Since the battery is already partially charged, I'm hoping that plugging it in now means topping it off by morning.

Turns out she was telling me about a jump starter, not a charger.

OK, so if I use something like this, do these numbers mean that 20 amps is what I can expect on a consistent overnight charge?

Yeah, that's kind of what I figured.

That's great to know. What do you think the maximum safe amperage is to charge one of these? I just called the auto parts store and they said they have a 12-volt charger with an 800 Peak amperage, which sounds insane to me but maybe that's safe?

Just as I posted this, I realized that since the isolator I have running from under the hood of my van back to my solar battery is clearly safe to run, with everything still connected to the battery and even on long road trips when the battery is already fully charged, that hooking up any other...

Hi everyone. This might be a bit of a noob question to ask, but you guys are generally pretty supportive for people on the learning curve, so here goes. I've been operating for the last year on the battery I built, which is a 280ah 4s 12v with a BMS from Current Connected (just like the...

Yeah, apparently they're all JBDs. So I guess we'll both be happy!

Oh, damn... That's less than half of what I just paid for one from HighTech. Well... at least the one I'm getting is 150A. But thank you, I'll definitely keep this in mind for the future!

Not sure if you saw my exchange with rhino^^^ but apparently the Hightech guys sell the exact same product, but with higher amperage. I just ordered one! And I won't have to wait a month for it...

Awesome, thank you for these clarifications. I sent a message to the high tech guy's profile, so hopefully he'll respond soon!

Whaaaat? Wow, I had no idea, lol... are there any other differences? The overkill ones are sold with 8 gauge cables on them, but I thought I saw another post saying the jbd ones don't come with cables...

That sounds good. Are the JBD ones good? As good as Overkill? And do they have the features I'm looking for?

Aaaand, which one might that be?

Thank you for this reply. I was looking at the other linked Forum thread from the Hightech Labs recommendation. It looks like most of the stuff on that thread is about jbd products, and I couldn't tell from the pictures posted by the high-tech person whether they were selling stuff they produce...

I've seen some other forum threads on the matter, but the ones I've come across have been rather specific for other setups different from mine (8s, 16s, 24v, etc) - and, since there are different BMS models for each different type of setup, it seemed prudent to ask about mine.

Why have I only gotten one reply to this post so far? I'm feeling puzzled about this ?

Hey, so I have a 4s lifepo4 280ah (EVE) setup that currently doesn't have a working BMS. I originally got a Daly 200a Smart BMS with the whole package (from Alibaba), but a few months ago it was screwing up so I retired it and got a refund. I've been running my system without a BMS, but with my...

Um... no dying swans for me, thank you. I just connected ring terminals instead of the clips and I'm actually reading some amperage now. I think I'll let it do its thing for a while and see what happens. But thanks!

OK, what does it mean?

I wish I knew what that meant, but I have no idea.

But as far as the tiny reading I've been getting, the reading honestly bounces around that much - or more - all by itself without the clamp even being around anything.

The voltage I'm reading at the clips is 3.31 or 3.32, while it's all connected. As far as measuring current, I have access to a clamp meter but I've never used one and after watching a couple of YouTube videos I don't think I'm doing this right, because all I'm getting when I put the clamp...

Sorry for the lack of clarity. My main concern here is the fact that the amperage on the power supply still has never dropped to zero, which means it has still been taking a charge even after 10 days. It should have gone from zero to full after about four and a half days. And yes, I disconnected...

I think you're meaning to say 10a, not 10w. But how is the calculation of wattage necessary to figure out what I'm doing here? Charging at the voltage of the cells - and at 10 amps, when they have a 280 amp-hour capacity - should charge completely discharged cells all the way to full in 28...

These cells have now been connected to this 10 amp charger for over a week. 10 days, actually. In that 10-day period, there were either two or three nights during which the power supply was turned off, but the rest of the time it's been on and connected day and night. That means they've had...

I have had my 4 280ah EVE lifepo4 cells hooked up to a 10 amp bench power supply for over a week now, and the amperage still has not dropped. They've been connected for about 10 days. On two (or possibly three) different nights, the power supply was turned off- but it has been on day and night...

Hey, thanks for all the sidebar engagement in this thread, but I have another quick question. I'm feeling a little concerned because, after having to scoot the whole setup over a foot or so, several minutes later I walked by and saw the voltage was at 0.28. I immediately wondered why, then...

The terminals individually, both while connected and when disconnected from each other (I just checked), all read 3.31. The power supply says it is sending 3.66, but with everything connected I checked the terminals and they read 3.31, oscillating to 3.32.

OK, I'm still puzzled because this thing has been connected for well over four days and the amperage still has not dropped. And, oddly enough, the voltage has risen to 3.66 instead of 3.65 where it's been for days. That's not bad, is it? How long should I let this thing sit on this charger...