Most reacted threads

First off, I am very happy with my purchase, thus far. The transaction went smoothly, and Miss Wan was quite nice to deal with. A detailed timeline included below. I have thus far built just one pack out of four, but I have found all voltages to be either exactly or within thousandths of a volt...

I just built my first 12v 4s LiFePo4 prismatic pack, and it went smoothly, but:P The 16 280ah LF280Ks cells that I got from Amy Wan were very well matched. I am off-grid, and entirely 12v at the moment, so it made the most sense to build a 12v pack with bms, and bulk up the charge with my solar...

Diy battery warmer-Seedling Warmer I'm in East-Central Texas. I recently acquired a pre-built battery pack of 4 LiFePo4 prismatic cells @ 12v, 100ah, with a Daly 100a smart BMS. I had been considering buying a warmer, but we rarely(until this week) see sub-freezing temps where I am. If it does...

I'm connecting 2 to 4 PCs LiFePo4@280ah/12v. Each BMS has max output of 100 amps, and max draw will be from a 12v 2000 watt inverter (166 amps). I am planning to connect each battery pack separately to 5 lug buss bars. I was going to use 2/0 cable for the full 166 amps, but I got to thinking...

I'm reconfiguring my system. It needs to be portable. I've built a 1180ah 12v battery in a road case. I'm building a cabinet for the inverter (straight 2kw inverter, psw) and the charge controller. It will be connected to the battery by cable umbilical. Question is this: option #1-for most...

I have a LiFePo4 bank with 4s4p. I have four 12v packs, each with it's own BMS. The packs are keeping good balance, individually. Each pack is wired to a Victron Lynx PowerIn busbar, with each pack having it's own megafuse. The problem is that the packs are drifting out of balance from...

My solar flashlight quit working, and I have determined that the driver is bad. The power source is dual 18650 batteries at 7.2v nom. The bulb is cree xm-l (C1). Bulb powers up on 4v from the bench top supply, but power applied to the driver does nothing. Can someone advise me on how to buy a...

I have a simple question, I think. I just need to ask it. I am preparing to wire two separate 12v 280ah LiFePo4 packs together for 12v service. Of course, the recommended method is parallel, with POS on one pack and NEG on the other, and leads going to pos and neg load buss bars. My question...

Newly built 280ah pack. Due to bad solar weather, this is only the second time I've hit full capacity. Yesterday, I had a 'pack over voltage' cutoff. This was expected, due to difficulty programming the Ampinvt charge controller, since corrected(I think). The cc is reporting 100-ish watts off an...

I have a Victron Smart solar 150/100, a bmv-700, and a LiFePo4 bank @12v, 560ah. Each device gets different battery voltage readings with the cc getting the most innacurate readings of the system. For example, I am currently charging, and here are some readings: 13.61 voltmeter(Klein Tools...

My bms has a connector that was poorly mounted. See pics. The 'hot melt' or adhesive that they used was obviously not allowed to set before the connector was released. Resulting in a non-effective stress relief. This is a temperature probe connector. Is this intended as stress relief or simply...

Can I build a 4s battery with BMS, then charge the whole series with 30 amps from my mppt solar charge controller until I get one cell to about 3.55, then go to top balancing with the bench top PS? I want to do it this way, because I currently operate off a 100ah LiFePo4, and I cannot simply...

From "Freightwaves"- Stranger Than Fiction https://www.freightwaves.com/news/container-shippings-stranger-than-fiction-first-half-of-2021/amp

So, I just got a roadie case(road case) in a sweet deal, and I want to put my batteries in it. I have 4 packs at 12v and 280ah LiFePo4. I've measured, and if I reconfigure the wooden dividers, I can wedge all four packs along the back (hinge) side, with their long sides together. It is just...

Micro inverter/charger for bike packing? I am planning a bike packing trip overseas. I want to buy a battery when I get there, so that I don't risk having it denied at the airport. I will already be carrying drone batteries and other gadget batteries, so I can't really bring another battery. I...

I am setting up the fuel gauge in jbd BMS. I have the percentages from the manufacturer, but the chart doesn't feature 80%, or 60%, so I've had to extrapolate. It seems pretty straightforward, but let me know what you think. First image is spec, second image are my notes.

Can I boost a single[or 2] LiFePo4 cell up to 48v? I'd like to try to run my ebike on LiFePo4 cells. A single EVE lf280k would theoretically provide 17+ah @48v. This would be pretty compact and simple to manage. Would I suffer tragic losses in the conversion? Would a converter of sufficient...

Folks, I was a Renogy fan until very recently. I always got good support, until this year. I recently wrote to them regarding an issue with two of my panels. Initially, it was just some suspect back sheeting on this panel, but they replied to my request for assistance by claiming this damage was...

Hello. I have been off-gridding for years. I’ve been using AGMs, but my current 2pc bank is slowly dying and 250ah nameplate is really only producing about 60-80 ah. I’m considering going with 4x 180 prismatic, since (pre-covid) I travel to up to 5 different locations per year, and weight and...

One of my LiFePo4 packs just got below freezing for the first time. It's set to under temp disconnect at 2°C, but it is currently registering as -0.9°C, but still indicates charging in "on" position, with no faults. This battery is not currently connected to anything. These are EVE lf280k cell...

I have a friend setting up a VoltEdge® M24-700ST battery, and we cannot find a user manual with charge parameters anywhere! Anyone got any advice?