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Now that you mentioned it, I recall having an alarm and the output cut once or twice, shortly after installing. At first I had 2 - 24v batteries in series with separate BMSs and I think I had problem with one of the BMS kicking off due to a out of balance high cell. I can't recall it ever...

Interesting and price seems good. Will carry 300 amps continuous, but I wonder if it has any current interrupting capability, incase you need to switch it off with a load.

Was about to report this post, you probably should change the title. I had a similar situation and could not find anyone that does laser welding who would be willing to weld on my Lifepo4 cells. All were afraid. I ended up drilling into the top, first with a small drill. Only an 1/8" deep at...

I purchased this 9 months ago on Amazon and it has performed flawlessly. Unfortunately I lost one of my 260AH Winston cells and had to change my system to 36 volts, so I bought the same one in 36 volts and no longer have a use for this 48v one...

I thought about that, may give it a shot and see what they say. Thanks.

Probably, because I see the cap was missing, but some cells already had caps missing, when I bought them from battery hookup

Yes, and I have 48 volt fan that exhausts air to the outside, but we did have some hot days, I bet the trailer was close to 100f.

Had a 48 volt 16 cell system in my enclosed cargo trailer and after being away for 5 days, found 1 cell melted. System has been functioning fine for about 6 months. Not sure why the Heltec BMS did not disconnect the batteries from the MPPT. The BMS kicked off a few times when I first installed...

Where did you find 200AH battleborns on sale for $899? That is a good price!

Thanks, Good point, I'll see if I can find a higher power converter.

The DC DC converter I am looking at is 760 watts and I figure 24v output is fine, since the current 100 watt panels are only 21.5 volts. My goal is to keep batteries for the engine and existing house bank charged by the same solar panels that charge the new 48 volt system. The reason for wanting...

Jim, You make good points, especially for a trailer and there is no way the DC DC converter has enough power to start a generator. I my class A Diesel pusher the engine battery will start the generator. My main question is, can I use a 48vDC to 24vDC converter to supply input to the existing...

Anyone see a problem with this? My motorhome has 2 100watt solar panels and a solar controller that has a maximum input of 30v. I am replacing the 2 100 watt panels with 4 435 watt panels, 3500watt 48V MPPT/inverter/charger and 270AH of prismatic batteries at 48 volts. My plan is to keep the...

Yikes, I was wondering if you could remove it without making things worse. You just used 2 of your 9 lives. ;>) I envisioned it welding itself to the studs as you lifted it off, then get so hot it meted like a fuse, or one of the other jumpers in the pack melted.

I vote for #2, - Easier to add to my current setup because I am just piggy backing another battery off the current ones - Potentially would help keep everything in sync as the batteries of slightly different age would be paralleled together

If he wires batteries in series (would require a 24v inverter) then he can get about 1500 watts out of the system. So, either a second MPPT or a new inverter, which ever costs less. Personally I would go for the 24v solution. Or parallel up to 3 more MPPTs and get the up to the full capacity of...

You could leave on the inverter, but the batteries would charge slower. From Google " While it is true that many AGM batteries are able to deliver a higher percentage of rated capacity at lower temperature, Gel batteries are quite capable at lower temperature and many are rated to operate at...

Couple of interesting items regarding the readings on the charge controller: The battery voltage is 11.9v. Since a gel cell at (11.8v =0% state of charge) and a 25% state of charge is12.0v, (50% will be at 12.3), so I am guessing you might have 10% charge at this point. Which is about what you...

Should you decide to charge with a 12 volt charger connected to your Yamaha generator, you should attach the + (positive) to any of the red dots and - (minus) to any of the black dots. You can pick the ones most convenient.

I agree with Hedges, you have a the batteries arranged for a 12 volt system, so a car battery charger can get you going, but the panels might also do it, if you keep the inverter off until the batteries charge up. Could take quite a while, either way (days maybe). Good luck. If you put a...

You first need to verify how the batteries are wired. Best to take a picture and post here, if you do not understand series and parallel connections. Then we can tell you what voltage the charger has to be. Your yamaha generator should be able to do the job. If the batteries went dead and then...

Heltec's website, Echo Zhao was quick to answer my questions (evenings, pacific time, probably morning for him?) Company Name: ChengDu Heltec Automation Technolohy Ltd,Co., Contact Person: Echo Zhao Email: echo@heltec.cn Skype: echodongmei Tel-Number: +8618123313360

It appears my problem was a programming error. In the battery advanced settings, I had programmed my desired settings into the MPPT via blu-tooth and saved to the controller. Then read them to verify they were correct. Then when to standard setting page and noticed that the battery type was not...

Quick shipping from China to Southern California Heltec 16c BMS and active capacitor balancer, ordered on 16th received via Fedex on the 23rd. Also great communication and help.

Thanks for your reply. I will try backing off the charge voltage on the MPPT to eliminate or prove the high cell volt possibility. Note: My inverter only inverts, does not charge and the batteries voltage meter never dropped in voltage, (but it might have a slow response). The other thing, is...

The alligator clips are a temporary hook up for a small 48v 5" cooling fan and have a small fuse in line. No load was cycling on and off, there was about 10 amps charging the battery.

The extra terminals are most likely for convivence of making parallel connections. More than likely they are already paralleled internally. On the other hand it could be that each battery may consist of 2 cells that can be arranged in series for 4v or parallel as you have them for 2v. To confirm...

Lots of helpful info on this forum, so maybe someone has an answer for me. My cargo trailer system has been running fine for about 2 months, but yesterday I noticed the inverter trips off for high voltage for a second, once the batteries reach 54.5 volts (.5v above my charging limit voltage...

I am looking for the same thing, the link you supplied do not disconnect until 42v. My batteries should not go much below 48v, so I would like to turn off the inverter at 48 volts. Currently the BMS shuts off at 48 volts (non-programmable :>(( ) then the batteries can't charge up again when the...