Recent content by DeeK

Active, continuous balancers for 3.2V Lithium Iron Phosphate cells. I purchased from Electric Car Parts Company and used for a year before moving to a different system. They have LED lights that indicate when they are charging or discharging a cell. They are the same as ECPC is currently...

I don't know enough to comment on how the different formulations would affect charge curves but I have watched intently through an embarrassing number of charge events for different LFP batteries and I have found these curves to be very accurate and representative. I have unfortunately not found...

Sorry, I reread and you clearly said it protects battery positive, my mistake

But, if it "protects from over amping" that's exactly what I'd be putting an in-line fuse to do, right? Maybe it's simply a reverse polarity protect? Plus, John frum indicated earlier that this fuse interrupts the solar side. Oh well, I ordered yesterday and guess I'll need to do some testing...

So, this fuse doesn't negate the need for a separate fuse on both the solar feed and the battery connection?

Thanks, I hope you're correct because that will provide a handy disconnect for the solar in case I need to do anything. Maybe Ben will clarify as well.

Alrighty then, can you tell me what circuit the small blade fuse that inserts into the bottom edge of the controller protects? Is it the battery or solar or load? My larger Victron controllers don't have a fuse there.

I wish I could provide credit for this work but I cannot remember who generated these curves. I believe it was someone on this forum though...Apologies to that person because these are extremely useful. These only cover the range typical in domestic solar charging from 0.2C to 0.05C but the...

No, the slopes of the charge curves vary dramatically toward the bottom and top depending on charge rate. Charging at 1C has much more gradual slope towards the top which allows you to push 14.6 (in a 4 cell battery) without issue. At 1C though, 13.6v would only be about 70% charged. I'll try...

I agree with time2 roll about limiting the V to less than recommended. The issue is that at low charge rates, the V to SOC curve gets very steep as you approach full charge. As you approach 14V at slow charge rate, it takes very small increments of power to cause the V to rise. Your battery has...

I am new to this discussion and controversy. Was shopping a small Victron charge controller for a portable set up I am putting together for a van and stumbled upon Signature Solar who has a great price on the unit ($20 less, a little over 20% cheaper than Amazon). Googled looking for others'...

I agree that you've solved it. The battery manufacturers are in a difficult spot because of the wide range of charge rates that are used, especially in RVs. When they spec 14.4 or 14.6V it's totally reasonable for a high charge rate but using that at low (typical solar) charge rates will...

I am glad you posted this because I was on the verge of springing for their $1K 200Ah LFP battery. I understand that it needs to shut off charging to protect a cell but, you're right, it should not shut down for more time than needed to rebalance the cells. That's concerning.

not true, most batteries claim 1,500-3000 cycles but there is variability in what's reported because life cycles depend on depth of discharge and they're not standardized. i believe renogy's 2000 is based on 80% DOD which is way deeper than most of us typically go and you'd likely get many more...

for those of us in solar world, charging at 0.07C or less, 13.8V absorb is awfully close to 100% anyway. It doesn't surprise me that the balancer could not keep up when charging above 13.8V at low charge rate because one or more of the cells are in the near-vertical part of their charge curve.