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Thank you very much, Mike. It's nice to have an explaination and a work-around (be nice if it came from the vendor and was in the manual) and yes, it's quite worrying that it allowed things to get almost 25 degrees C above the threshold w/o tripping the safety features. I did note also that the...

I think all of the temperature settings are a BMS specific (or battery overall specific, depending which temp sensor is being read) setting. In other words, it isn't a cell-level setting. In this case the discharge over-temperature of the BMS temperatures sensor (not the battery temp sensor) is...

Any thoughts on why? So far, I've seen nothing in the Overkill manual that says this. Seems quite dangerous to allow a setting to effectively disable a safety parameter without notice and/or good reason.

I've contacted Steve from Overkill several times on this and haven't heard back. Perhaps others here can shed some light on what's going on. The discussion thus far: "Hi Steve - I have two of the JBD Overkill BMS's for two separate 4S 280AH battery packs. One I've used throughout the year in a...

I just received a refund using PayPal for a purchase of "goods or services" on Facebook Marketplace after the item arrived not working. It was also misrepresented as being "new" when it was not. I paid as a business and specifically for "goods", which I made sure were specified exactly what I...

No problem - we all learn from the experiences, good and bad, that we post here. If (a very big IF) I ever decide to do this again, I'll seperate the battery into individual cells (as was done when I did the original terminals that turned out OK) and use a drill press with a solid depth-stop on...

Thanks for bringing this up. It was promptly cleaned, with the inverter and other electrical components exposed blown out with high pressure air. It does look to be a good idea to go back and use elctrical contact cleaner on the components as well.

For sure. The less robust terminals on the earlier, less expensive cells were problematic enough. Quite thankful to be getting away with as little damage and down-time as I have. It could have been a more immediate 'volcano' of gassified electrolyte which likely would have hit me in the face as...

This thread has become a treatise on projection, not battery protection. Most members here don't do this - thankfully.

Indeed. Even with a drill press and/or physical stop I'll not be drilling cells again. Getting the right depth to drill was already basically a hazardous guess, and with the inconsistency of these lower priced cells even having accurate information for doing so may be wrong given the poorer...

UPDATE: The trailer has been completely washed and the smell is almost unnoticeable. The paint on the ceiling area was not damaged in any way, just discolored with small bits of debris that washed off almost completely. There was no sign of heat damage anywhere aside from the battery cells and...

No indication that the terminal spun. There are no visible traces of liquid electrolite - it appears to have all out-gassed and turned to white smoke during the eruption. Remarkable: the inside of the trailer is a lot less affected by the smoke and smell than I'd feared. I'm still removing items...

Yes - I should have used a solid depth-stop - however: I used the same depth gauge (tape with a small part left hanging to brush the metal particles aside as it neared the desired depth) ) as I used on the other cells, and although it grabbed a bit at the last, it never seemed to go farther...

An update on my helicoil adventures: I got in on a Michael B. Caro battery group buy a while back, and the 4 - 280AH cells arrived dented, etc. To his credit, at that time Michael was prompt in contacting the supplier and ultimately giving me a full refund. At that time the cells were tapped for...

Anyone have recent prices for the Fortress Power eVault Max 18.5kWh LFP Battery ®?

Thanks - I'd no idea Generac did anything but backup generators, etc but they do! Tesla is out simply of quality control issues and questionable market presence re: longevity.

Hello - looking for anyone with experience with either an all-in-one (panels, batteries, etc) or install-only solar installation company in the western US (Northern California, Southern Oregon, or western Nevada, most likely).

Any updates on this, re: return policy for the DOA, and performance of the good EB240? Thanks!

Please read "The Deficit Myth" by economist Stephanie Kelton - we've all been lied to about the US debt. That's one lie that is disabused in the book mentioned above - all viable currencies must have an economy based on something other than the hope that more people "buy into" it. Physical...

Fiat currency (US dollar, et al) is backed (guaranteed) by the US (or others) governments physical and human resources. Crypto is basically a pyramid scheme because it is backed by nothing other than the hope that people will keep buying before the inevitable bursting bubble.

My conclusions so far is that these cells/batteries won't freeze (or develop cold-spots within them at all) quickly due to their mass. My trailer is unheated, partially shaded (~50% of the day) and parked outside nearby. The JBD/Overkill has a low temp charging cut-off set for 0 degrees...

Very nice setup! The toilet flange utilization is top notch. ;-)

Looks like it is leaking? Any leaking cells (or those dinged up to this extent even if not leaking) I'd not mess with at all.

Probably due to the ground temperature below the frost line (which varies by region and time of year) being higher than that at or above ground level when it gets near freezing temperatures outside. Depending on your location it can be above freezing a few feet (or more) below the surface all...

I've only assembled two, 280AH 12V batteries for my camp trailer, but with each I've used large cables with lugs on each end. It's more time consuming than solid busbars, of course, but because I had the materials and a hammer-powered crimper it worket out well. Are there any suppliers you know...

Yes - mine is much on an old, slightly beat-up 13' camp trailer and is much smaller scale but the concept is the same. PV wires from panels (red/black) come from roof and enter the bottom of the box, are combined, then exit to a wall gland into the battery compartment. So far it's been...

Probably, but I'm not sure how long it would take with the panels you have. A stand alone charger is not very expensive and likely faster. Either way, I wouldn't do anything else until the battery is fullly charged to 14.6V in order to rule out the battery. Let us know after you get it fully...

The specs on your inverter show that it has 3000W surge capacity. The fact that you can run the battery for a few minutes before the inverter shuts down at ~12.7 volts means that it's not a low voltage issue on the inverter, which specs show should do a low-voltage shut down at 10.5V, not 12.7V...

Are you charging the battery with just with a solar charge controller or are you using a stand-alone battery charger at first to get it topped off (around 14.6V)?

As short as you can make them and still reach. Have you fully charged the battery yet? If so, what resting voltage (disconnected for an hour or so) was it when it was done charging?

This is a confusing thread and I may have missed something, but: Did you fully charge your battery? What resting voltage (disconnected for an hour or so) was it when it was done charging? What I've read says that you're using the battery at 12.9V which is only about 30% charge. With the...

The picture I posted is SolarKimmy's batteries (I think)?

It looks like the tops of a few of the battery boxes may be ajar a bit on a few of them. Is this from being serviced and not yet re-secured?

Update: I was going to wait until I built a compete battery box w/compression to place the battery cells into a series configuration with a BMS in order to finish charging, but decided to go ahead with just the cells clamped temporarily. After parallel charging @ 3.65V for 82 hours and resting...

Seems so. Per powerstream.com: "The typical charging voltage [for a lead acid battery] is between 2.15 volts per cell (12.9 volts for a 12V 6 cell battery) and 2.35 volts per cell (14.1 volts for a 12V 6 cell battery)."