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Just installed one of these new DC-DC chargers on my camper 300Ah lifepo4 tongue battery. Great specs, seems really solid and IP67 weather protected so it's fine outside. I'm very happy with it. Software app via Bluetooth access on my phone is appreciated. I was very pleased to find I can...

Still got it for sale?

I almost built one but had no time for that project. Since you mentioned EG4, I've got one of each: Lifepower and the EG4-LL. Both are 24v and run great but the Lifepower had some trouble with rapid high amperage discharge and would shut down only in one situation, when cranking up my camper's...

Look at Morningstar. Great controller.

For what it is worth, the firmware upgrade did prevent the total shutdown of my EG4 Lifepower4 battery when starting the air conditioner. But it still would not start it on that Lifepower4 battery. I swapped in my EG4-LL, which is practically the same battery with a different BMS, and starts...

I understand you think I haven't thought a move beyond the immediate, and that a superior chess player (which I'm obviously not) could look ahead and see what is faulty with my system. But while it seems to be obvious to you, I'm not aware, technically, what is wrong? Instead of educating about...

Appreciate what you're saying regarding capacity and space to store batteries. In my case, I already had the lead in my cabin's garage and some space for a bit of Lifepo4 was not hard to come by. I suppose if I were trying to increase capacity all within the same space it would not fit, adding...

Now that is a reasonable statement that you don't see any advantages and you perceive some disadvantages, namely a loss of high capacity, continued weight of lead, watering and maintenance of lead, and Puekert effect concerns. In my experience, first, as I perhaps did not explain well enough...

Here is an interesting 2016 academic article modeling the hybrid LFP and LA battery in a remote medical clinic: https://juser.fz-juelich.de/record/829025/files/PE_070_Christiane.pdf Here is a commercial product combining chemistries...

So, I think we all know what the Puekert effect is, and I'm going to assume you meant that in a joking manner. But your statement simply begs the question. I'm waiting for your explanation as to how this manifests as problematic in a mixed system. Can you please enlighten us?

What about the Peukert effect and what about active balancers? Not understanding what you mean with those references.

So, I updated the firmware on my 24v EG4 Lifepower4 and tried to power my 12,000 btu portable air conditioner in my camper. When the compressor started, the EG4 battery voltage apparently dropped, resetting my 3,000 watt Giandel inverter via it's LVD. The battery came back up then instead of...

Gotcha.

I'm told the Micro Air, and similar products, will also lessen the wear and tear on the compressor. Still not clear - is my weak link the inverter or the EG4?

Ha! Well, I may end up with a Micro Air! Others?

Well, this was a particularly spirited string of problem solving I enjoyed very much. Any predictions on whether mine will work without a Micro Air.

So for clarity's sake, and because tomorrow I'm going to try to run my portable 12k btu air conditioner on a single EG4 Lifepower4 (updated firmware) using a 3,000 watt Giandel inverter at 24v, when it fails should I blame the inverter or battery?

What specific air conditioner is it? Portable? Did you measure max amps when the compressor starts after the 3-5 min?

Same. I had the wrong cable and am waiting for the correct one to arrive.

Boondocked with my 24 v EG4 LifePower4 pulling 100 amps continuously, no problem, via a waffle iron, hot plate, fans and lights and such this morning, using a 3,000 watt Giandel inverter. It all ran beautifully, including my Keurig which draws 58 amps. Cells well balanced. Still want to do...

Curious of your results after getting them to the same SOC? Any news since mid-July?

On the video it appears they have that error once on the screen, if I'm not mistaken. Then it reads the boot info. In comments to the video one person writes about changing the order of wires to connect. Not sure whether that was with the other cable? Looking forward to information from your...

I just ordered the cable tonight myself. I must have missed the need for a different cable than what I normally use to read my battery on my laptop. When I tried to update I got an error unable to read the boot file. So I'll wait. Wish I knew the particulars. For example, did it change the...

Have you done the update?

I think of a BMS as a device designed to shut everything down if certain dangerous events happen to a cell or cells. The BBMS shuts off charging too, but not necessarily only on those same dangerous events, and with more control and an eye on optimal charging of the bank. I've read many...

Also, there is a rain cap you can get for the chimney exhaust on top. It keeps rain out and importantly stops wind from blowing it out. Great option to add.

Nice system. Thanks for sharing. In the midst of a similar project. Yours looks like a very economical use of space. Did you have any concerns about space around components and adequate air flow for heat dissipation? Ever get warm under the benches?

Nice.

Nice! I've done that too. My manual system doesn't qualify as "intelligent" so I'm using Clark's engineered Bank Manager BBMS.

Good points. In my case I already had the LA I wanted to keep to preserve my investment in it, increase overall capacity and performance by adding lithium, and as mentioned I have an alternator attached (wind turbine) that I want it to stay connected all of the time to a load (like any...

Yeah, the BBMS takes advantage of the benefits of both chemistries. It's not an extra layer of protection so much as a primary manager of the combo chemistries The BMS is still there as the last line of protection. And once set up there is nothing manual about it, it just works. I'd highly...

My lead is 315Ah at 24v, and only two years old, so I expect it will last a long time this way. Didn't want to dump it, but wanted lithium. Very glad how it turned out.

The BBMS doesn't primarily use voltage to disconnect (although it has a max voltage to disconnect for safety). Instead, it runs a counter as part of the BBMS using current, time, voltage, etc. to know what's in the battery. I have it set to disconnect when my lithium is at 95%. My lithium...