Yellow Measure

Hello and welcome. What country are you posting from? What is the make and model # of the batteries, and the inverter? How do you know that the DIP switches are incorrect? Is there no switch on the batteries? Even a soft switch? Can you share a photograph? How do you know that the comms between battery and inverter are working or not working? In a setup where there is BMS --> Inverter communications, the inverter obeys the commands of the battery BMS, not the other way around. If the battery SOC drops too low, then the inverter is either not following the directive from the BMS to cease discharge, or the BMS has not issued it. The BMS can also issue a charge directive to the inverter, demanding that it charge the battery if it gets too low. Please provide the make and model # of the batteries, and the inverter, so that people have the information that they need to assist you?

Ja, those JA Soar panels are well-behaved, under the 13A limit so no clipping / inefficiency. Agreed that, if you had the North-facing space, you would want to place them there, it's by far the most efficient. Then again, if you have an east facing roof, you may want to consider some on the East as well as the West side, because it then also extends your generation time every day by 2 hours instead of only one.

Kynee is a huge company in China, they even white-label their batteries to other manufacturers. I recently purchased the Hina ESS PowerGem Max, at the time I new nothing about Kynee and I assumed that they were new entrants with no track record, that's what steered me towards the Hina. Imagine my surprise last week when I discovered that the Hina ESS is basically a white-labelled Kynee! The Hina ESS (Kynee) has excellent build quality, packaged very well, and the documentation that comes with it is glossy and superb. The Hina app is not as good as the Kynee one though, there is far more information and settings available on the Kynee app, so the Hina app in comparison looks a bit "dumbed down". I guess that it's OK if you don't want to be in control of everything. Had I known what I know now, my purchase decision would have been different, and I would have benefitted from saving a few thousands of rands buying the Kynee.

I think we need to stop here, before the Mods nail us for making them spill their hot chocolate...

The Coulomb Counting is a separate field of study entirely, reserved for the PHD Program at Buttery University 😆

LOL. That's reserved for those that have a Masters Degree in Cycle Count. 😆

I think that you are onto something, and I like your approach, but words matter. Raw material value would be the input materials at the Pylontech factory, before they assemble it, test and put it on the market as a brand spanking new battery. Salvage value would be the value of the battery after someone has used abused it by applying "a few high voltage charges", and it swells up like a marshmallow in a microwave. I asked Grok, who gave a detailed, interesting response: So it turns out that chemistry, condition, location and volume are relevant (no extra dollars for the marshmallow ones!). Hubble AM2s are NMC, Pylontechs are normal LFP. And remember: this is in the US, where they have recycling industries that can leach the chemicals and re-use them, not South Africa. So I asked Grok again, this time specifically Pylontech US3000s, and the response was that in SA, one would basically have to pay the recycler to take it away 😄

The batteries were abused, all 3 of them.

🫨 Don't try this at home, folks.

What an inane question. Nope. The Pylontech warranty on my own US 3000s is very clear, see attached (Section 3. Warranty Conditions and Section 5. Warranty exclusions). Here is an excerpt: You remind me of Mr. Jaco van der Merwe, who towed a two-ton heavy-duty all-terrain off-road trailer with his Isuzu KB280 4x4 double-cab bakkie. The bakkie was also fully loaded with equipment, and carrying multiple passengers, and to top it all, had a roof rack heavily loaded with gear. Expert testimony in the Supreme Court revealed that the trailer had exerted a mass in excess of 1,650 kg on the towball, resulting in the chassis bending like a pool noodle. The permissible maximum towball mass specified by Isuzu was 90 kg, so they (quite rightly) rejected his warranty claim. In protest, he drove around Pretoria for years with a bakkie shaped like a caret, with a huge sticker on the rear claiming "Worst 4x4 by far", and the same on a massive hotdog vendor banner on the vehicle's roof. This caused much mirth and laughter for the people of Pretoria, who all stopped, pointed and laughed at him, including myself. Van der Merwe seemed quite oblivious to all of this, and the cringeworthy position that he had put himself into. But the worst was my wife at the time: she developed uncontrollable and unstoppable giggling every time she saw or thought of van der Merwe and his famous bakkie. Even days after, when she saw the name "van der Merwe" on some correspondence at work, she had to take the rest of the day off because she was unable to stop laughing. Pylontech warranty.pdf

Show the Ipv for the same day?

Careful now boet, I have a rural acquaintance with 5x US3000Cs that he has "hardly used" for 4 years, kept at 100% SoC @ 35-55 degrees C. After introducing him to the wisdom of Powerforum and Battery University, he said "So my batterye het blykbaar grondpad gery". 😆

I have given this matter a good think-over, and have realised that people tend to value their solar kit at far more than what it is worth. There are many factors contributing to this, like pricing fluctuations, and also possibly the perceived value and pleasure that they derive from using them. Some may even value their installations for the snob / social status that it provides them, along with the size and brand of their battery bank, their inverter/s, the quantity and kWp of their solar panels. Then there is the actual condition of the battery, determined by experts who consult the data which is logged by the battery, and as @Boerseun has pointed out, this will reveal quite a lot. For example, an owner who cycled the battery on a daily basis (per warranty Ts & Cs) would have a healthy battery that is in far better condition than one who charged it to 100%, and kept topping it up for 2 years, and then cries "But it's hardly used!". Whatever the case, it is clear that the intrinsic value of alternative energy kit is often outweighed by the owners' perceived value. A similar situation exists with homes, cars, and other possessions, where sentiment, emotion, political and economic ideologies tend to sway the value that people attach to their possessions (and that of others). I think that the parallel drawn by @Boerseun is spot on, and can actually be applied far broader, to all possessions / assets. Any classical libertarian / free-market economist worth his salt will tell you that the value of an item is worth something between the price that the individual owner is prepared to accept to part with it, and the price that another individual person is prepared to pay for it. Willing buyer, willing seller. The opposite is true for Marxian / socialist economy, where individual ownership is discouraged in favour of "the collective", and the price of something is determined by a number of theories, ideas and philosophies. In a free market, price is a critical "sensor", because it informs the broader market what the value of an asset / commodity is. This is why ownership of property is such an important thing to defend, because only a person who truly owns something, can determine that they 1) wish to part with it; and 2) the price that they will be prepared to accept for it. With the old Pylontech battery trade-in offer, no-one is forcing anyone at gunpoint to part with their batteries. It is after all, an offer, which is subject to a technical evaluation, and which requires acceptance. If the owners' batteries are in such great condition, then they should keep them. After all, they are the owners, and no-one should deprive them of their right to own such fine batteries. The same applies to a car: trade-in value is substantially lower than retail, and if the owner does not like what he / she is being offered, then they can elect to either keep it, or to sell it to a random tyre kicker. Simple as that. So why are people crying on a public forum then, attempting to appeal to "the collective" ? I blame Karl Marx.

So did your friend accept the trade-in offer?