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Exactly. I’m not sure how many times we can tell the OP that the air movement isn’t waste energy. The heat is, and if that could be captured you might have something to gain. A better analogy for the air movement would be installing a turbine on your bicycle or the roof of your car to capture...

Shouldn’t be a problem. Unlike Lead-Acid, LFP batteries tend to get along just fine with each other, even if they aren’t identical manufacturer, age, capacity, etc. You’ll want to make sure they’re at very close the same voltage when you first connect them, otherwise you could get a LOT of...

You might consider moving one of the BMS negative connections to the other cell. It would help a little with the four-high stack there.

You should consider the electrolyte toxic and use lots of caution if it leaked... But is it possible that what's under that plastic covering is just water and it got there from outside of the cell instead of the inside? You said there was moisture on the outside of the cell also, was that water...

It looks like you might just be asking too much of this battery. Look at the voltage slump a few seconds into the video... It goes from 12.9V to 12.3V to 11.9V very quickly. I'm assuming a load gets turned on somewhere around the 5 second mark? If it's 1800W, that's over 150A at 11.9V, which...

This question is phrased a little strangely... Solar power from the SCC can power the inverter and if there's more power available than the inverter requires, that excess will charge the battery. Also, if solar is producing less power than the inverter requires, the inverter will discharge the...

I wish I could help with this part, and I hope you find what you need. But what I can say is that 2 months of operating like this might be a way to wreck an LFP battery:

That is a very well balanced set of cells.

One of your cells has to be the worst cell. If the 101.8 Ah cycle capacity lines up with a full charge-full discharge, then that’s not so bad; your weakest cell has a capacity of about 102 Ah. That’s 97% of the advertised capacity.

Ha, I had not thought of it this way. Yes, on a per cell basis LFP prismatic BMS's cost a fortune! On a per-energy-stored basis, not so much.

I’m going to assume you’re talking LFP cells. It shouldn’t be a problem for the most part, you’ll have to do a little extra work, and your battery will only be able to provide the Ah of the weakest cell. In reality, we all mix capacities in our batteries since the cells aren’t all identical...

They won't do anything useful. What you're probably thinking you want them to do is stop one shaded string from pulling current from the others, but that's not what happens. A shaded string (or panel) still produces lots enough voltage to stop current from flowing backwards, it just won't...

Given those options for the current PWM, I would change to the GEL profile. The 14.1 absorption is a pretty good balance of SOC usage and easy on the cells. The 14.4 is on the high side, but not entirely unreasonable. I don’t think I’d bother ‘upgrading’ to a different PWM. Save your money and...

I couldn't say with any certainty. Just because the material looks the same doesn't mean it is the same; a hardened steel or stainless steel bolt could be electroplated or otherwise coated for corrosion resistance and it would still be a lousy conductor. But even if the material was the same...

If you set the voltage with an open circuit (leads attached to nothing) and then don't move the voltage dial, the unit won't exceed that voltage regardless of what you do with current dial. Think of those two dials as setting Voltage to not exceed, and current to not exceed.

No. No, that would be a function of voltage only. Your charger will charge to a particular pack voltage, and your BMS will allow that charging to occur as long as no individual cell exceeds the maximum cell voltage. Good! You could let the BMS do this instead of disassembling and doing a top...

In the worst case, destroying the battery fairly quickly by continuously overcharging it. They will likely charge the battery, yes. BUT, you will really need to know what you're doing with them to make them charge the batteries safely. It's not clear from the limited documentation I could find...

You should top balance before you use it as a battery, but think of this as more like a part of the assembly process. No, the BMS will disconnect when one cell reaches over-voltage protection. Because this won't balance the cells. You need each individual cell to be charged to 100% for them...

No. The manufacturer either doesn’t know how their batteries work, or they’re lying to you. That will get them to the same voltage, but it won’t balance them.

On the hot end, your panels may get hotter than 50C on a hot, sunny, calm day. Plan for more like 70C, and check that your Vmpp is still above the minimum for the SCC. I would try to get something like 10-20% above the minimum for the SCC, and in your case you should be fine. I get: Vmpp at...

Yeah, it would take some time to cause damage. But if the inverter is constantly pushing power at this high voltage, it will eventually cause problems:

Oh man, talk about beating me at my own metaphor game! You’re absolutely right that isolation has its place for maintenance. In my professional life I work in Heavy Industrial facilities and I’ve been through enough safety training that working on my own system without the ability to ‘lock...

No. It will have produced 100W for 1 hour, which would be 100 Wh (Watt*hours) of energy. 400 Wh 1.2 kWh per day Common unit error that happens all the time on this site, unfortunately. Power (usually measured in W or kW) is already a 'rate'. Energy (which is what batteries store) is power...

Some more details would be helpful for us to give you a better answer, like specifications for the solar charge controller, and more the specifications for the panels (Voc, Isc, Imp, Vmp). But generally speaking, there will be some small losses in efficiency because Imp will be slightly...

If your cells are top-balanced, you might be able to get by without active balancing for some time. Having all the cells at similar voltage under no load is good, doesn’t say much at all about whether they’re balanced. If they’re not, when you charge you’ll find that one (maybe more) cell...

I'm wondering what was in the log earlier than these entries? I'm guessing a cell over discharge protection, and then an automatic power off. I'm assuming this would be logged, but I've never done it on my BMS, so can't say for sure. The reason I ask is that it might help point to what sort of...

I'm not sure exactly what you mean here... Cause it to be out of balance? Maybe. Probably not helpful in keeping a top balance. Cause it to be bottom balanced? No, that won't happen. Any more than charging them well above 3.65 volts would cause them to be top-balanced. In either case you...