Recent content by elpulpo

I think one of my cells is a runner. Video of my testing setup here, but it keeps shutting down the BMS due to over-voltage. If anyone has any other tests I can try please let me know. I tried draining the problem cell with a car battery, down to 3.3v but it just shot back up again after...

Yes, I tested the voltage and just got them top balancing now. Here are the voltages I measured from each cell: 3.226 3.224 3.224 3.226 3.222 3.224 3.223 3.222 Not bad, they were all pretty close. I've also attached the spec sheet that came with them and some photos of the...

I got my cells! Well, 6 of them anyway. Fedex says 2 are coming separately. This is what they look like. Does anyone know what I should do to test these to ensure they are in good working order?

Did you order these off of Amazon?

I always prefer to think of the battery packs in terms of Wh, because it's a measure of power and because I don't have to figure out if it's a 12V or 24V or 48V battery to know how much energy it stores.

Regarding the induction cooktop, I looked into that and decided it would eat up all my power budget, I'm working on a 600W Panel and 280A 24V 8 cell battery pack for a van conversion. I ended up deciding on using propane for the cooktop, as I figured I'd need another 4 cells to power the thing...

Update to this diagram in case anyone else is building a similar system. I adjusted all of my gauges and fuses, I think I've got it just about right.

Ordered 8 cells on Alibaba and am waiting for them now. Anyone use this supplier before? The customer service rep name is Shelly Feng. I went with them because at the time seemed like they were the only ones with stock and could deliver before June.

Interesting. I'm getting 8 cells for a 24v battery and was gonna hook up an overkill 24v 8 cell 100amp BMS. Any advice on just using two of these cases and making two 12v batteries and then hooking them up in serial? I'd have to get two 12v BMS.

Interesting. My van is a toyota Hiace and I'm going with a low profile fan mounted behind the panels. Hopefully it won't make too much noise. Also the fingerprints can't be helping your efficiency. I suppose it's insignificant, but it would bug me.

Nice looking install. Hope mine is as clean. Those fingerprints though! Guess I'll need to get gloves.

The ones in the sheet are the 280AH 3.2V Eve / Lishen cells that are popular. Most people seem to get them off Alibaba or Aliexpress, though they can be had on Amazon as well. Saw them first on https://www.mobile-solarpower.com/lithium-batteries.html. I bought mine but they haven't shipped yet...

A great reason to buy things locally manufactured is that it is more efficient and avoids a bunch of unnecessary carbon from global transport.

Does High Frequency Switching have anything to do with Modified Sine Wave Inverters?

That's a great start. I did my estimate with a Kill-O-Watt at each device, and it really helped me size my system. Sounds like you have a lot going on in your food trailer so getting better numbers on power consumption would be critical. I used this sheet to figure out how many LiFePO4 banks I...