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I don't know what "before" or "after" means, but option 1 is best. Current will be the same anywhere in the circuit, so the shunt will work fine in either location.

Sorry to hear about your experience. I might have use a different calculation-perhaps less technically accurate but easier for PayPal to understand. Cells are at EOL at 80%. The cells you received are at 85% They are very near EOL, and thus you should get a full refund.

Bob, ChatGTP is responding the way the vast majority of the modern world would, having learned from the thoughts and writings of the majority of the world on the Internet. It does nothing more, nothing less. ChatGPT isn't "woke" and the concepts of multiple genders isn't "woke" either...

Yeah, a lot of the compression theories and complex techniques went completely off the rails, that is for sure! Fancy and complex doesn't make a difference, just that you prevent the cells from bulging. I respect Andy a lot, but he hasn't run those tests to 20 years, nor has he x-rayed or...

2100Wh per day seems reasonable, and is almost exactly my daily use on my boat. That is about 160Ah per day at 12V. I would stick with 12V unless you step up to a 3000W inverter. I would suggest 300Ah battery at 12V to get you through a day of rain. 200Ah is just barely one days worth of power...

The lead carbon are basically an AGM with the benefit of not loosing capacity from sulfation. However, in order to achieve this, they need to be charged at a relatively high rate (0.4C) from a low state of charge weekly, with an occasional "refresh" charge similar to an equalization charge...

The same way as you measure any current. If you get something other than zero, double check the connections, and the open.

The overkill solar manual has an excellent guide to top balancing. I suggest following it exactly, as a mistake here can ruin your cells. A 2 amp supply may take a VERY long time. 4x150Ah cells is 600Ah. Assuming they are ~60 charged, that is 360Ah. At 2amps, that is 180 hours to top balance...

I am shocked that anyone that was caught up in this hasn't enlisted an attorney. Or maybe they have, and have just been advised not to publicize that fact here? There are even enough claimants for a class action suit. And a court could put a lien on his house or other assets-something a credit...

Balmar regulators cut field to 50% at 225F/107C. Since they manufacture alternators, that is probably the closest you will find for a manufacturer recommendation. If you have a 160A alternator, a 40A DCDC is very conservative. I would expect you could run at 160A for a few minutes, then cut in...

Likely your batteries are out of balance. They may "total" 40%, but in reality some cells might be higher than 40%, while others are near zero. As you add more batteries in either series or parallel, it becomes more difficult to keep them in balance. I am not familiar with that brand. You...

Sure you can use a 3000W inverter. Just use a smaller fuse. I have a 150A fuse on my 3000W inverter. I only need 1200W, but was gifted a 3000W.

LPF can be in pouch cells. Renogy did or does build them that way. It might be worth noting that Lithium Polymer refers to using a polymer for the electrolyte, not the makeup of the cathode, which is what LiFePO4 refers to. A cell can be Lithium Polymer AND LiFePO4 at the same time, and would...

Almost. The issue you will run into is absorption time. With a CCCV charger, once the battery reaches 14.4V the charger will stay at 14.4V, and will overcharge the battery. It is important the charging stop, either by turning off, or by reducing voltage to less then 13.6V, which if the battery...

No, it won't provide isolation. But it is still useful if you sail to other countries. It's much easier to have a universal battery charger that accepts 90-250V AC at 50-60Hz and just plug it in wherever you are and not worry about voltage or frequency at the marina. The ideal imho would be an...

The alternator should not be directly connected to the Orion. The Alternator connects to a battery (like a small lead-acid) and the Orion charges the LFP from that. The common setup is the alternator charges a lead-acid start battery and a DCDC to the house battery. If you want to eliminate...

Those are as probably the most significant factors. In my case, my Victron and the BMS report exactly the same voltage and current, at least over .5 amps or so. But, are a small fraction off at very low currents. My only charging source is solar, and my loads are light, so fractions of an amp...

Measuring voltage as received is useless for determining balance. The voltage will be very close until the cells are >95% charged and at 3.4V or more. There is nothing wrong with connecting them to the BMS without top balancing first. You can even charge them to test that the BMS functions, and...

I have seen successful installations without a BMS or balancers. It can be done. Just because it can be done doesn't mean it should be be. To be successful without a BMS requires a Thorough understanding of the issues, and taking precautions elsewhere in the design. Just slapping cells together...

For Lead Acid typical would be around 2%-5% of the battery capacity. So a 100Ah battery would be between 2A and 5A. If varies slightly by battery manufacturer, and will increase with battery age. Larger % is more conservative, ending the Absorb stage earlier, and finishing charging with float...

Well, yes they have solar controllers that do that, but they by definition are not MPPT. The most basic solar controllers are just a relay or FET that connects the panels directly to the battery, then disconnects them when the battery voltage reaches a charged level...

And explaination of ps (which is a new unit to me) https://www.uk-car-discount.co.uk/news/clearing-up-the-confusion-of-power-outputs-bhp-ps-and-kw "Next is PS or Pferdestärke (Horse strength in German) this was replaced as the EU’s legal measurement of engine power by KW in 1992. The difference...

Something that is encouraging, at least for now. OpenAI, although well funded by large corporations, one of the core missions of OpenAI is research into the ethics of AI, how to detect and prevent bias, and exploring how and where AI should, and should not, be used. Much of the current work...

Your batteries are 2 years old. I would guess that if you have gone 2 years without complaints, there is zero reason for an active balancer. Have you had Cell Level high or low voltage disconnects? If not, then do not add an active balancer. If you add an active balancer, you will hide the...

I would rather be able to have a smaller array, and not have to buy batteries, or dispose of them and replace when they were out. The key is to not need to rely on a utility company and have the fault tolerance of non-centralized power generation. I am perfectly happy for everyone that wants...

Fully charged Lifepo4 is 3.4V per cell, resting. That is, letting it sit disconnected overnight, then checking voltage. After charging to 3.65V, the voltage should settle to 3.4V overnight. If it doesn't, you probably overcharged it. With that in mind, if you charge to 3.5V per cell, then you...

Not necessarily the best solution, but I installed an mrbf fuse on the shunt, mostly because I had several on hand. https://www.bluesea.com/products/5191/MRBF_Terminal_Fuse_Block_-_30_to_300A

The order needs to be, battery terminal, buss bar, sense lead, nut. You absolutely DO NOT want anything between the buss bar and the battery terminal. It sounds like the battery terminal needs cleaned and was making poor contact with the buss bar. This would cause a voltage drop on the output...

It has been several weeks since I hit full charge. My battery has ranged between 45% and 65% according to my Victron during this time. So neither the Victron or the BMS has had a chance to re-sync. As I write this, the Victron reads 56%, and the BMS 74%. That is a really big difference. I...

I don't think foam is a good idea. The problem is that if you compress foam to 25%, the cells can still expand and bulge, and the whole point of compression is to prevent that. Consider, the 11psi figure is given at a specific state of charge. As the cell charges and attempts to expand, that...