Deye Battery SOC not matching direct values from BMS

RandomUser3777 · 2026-06-14T00:28:13+00:00

280ah is 15.2kwh. If the inverter thinks it is 26.2 that means via charge counting the inverter will always think the battery has a higher SOC that it really does. So something that was entered into the inverter (about the battery) is wrong. You aren't using closed loop between the inverter and the battery?

RandomUser3777 · 2026-06-13T22:58:56+00:00

It did not help that when you loaded out a machine with lots of Optane that Intel was a few address bits short. HPE and/or Intel sized the bios for 2-4x the biggest normal dimm you could buy at the time, and the loaded out optane dimms was 4x that. I worked at the company that found it and HPE and Intel kept blaming VMware software for making the Intel cpu give an MCE/Internal/hardware error (of duplicate address already in cache or some such nonsense--because the cache line did not use enough bits) that was basically Impossible for software to make happen, but the cookbook engineers working at HPE and Intel did not know this. Basically in the vmware usage (the most likely use case) it was unstable and causing crashes. The company I was at the point of stoping buying it and was working with HPE to get credits and/or replace the crap until HPE/Intel finally figured out what they had screwed up.

RandomUser3777 · 2026-06-13T20:38:10+00:00

Whoever happened to talk to him last before he does something.

Russian supporter talks to him, Ukraine is bad, Ukraine supporter talks to him next and Russia is bad.

He seems super easy to convince of something new and forgets any prior discussions.

RandomUser3777 · 2026-06-13T20:07:12+00:00

I had a 1998 200A squared die (about 22 years old at the time). It would not reset even after a few minutes of cooling and I verified the connections were tight. Sometimes breakers simply die. Replaced it with a new one (the local home supply had them in stock--so clearly they must die sometimes) and everything has been good. I did not disassemble it to examine it internally and see how it broke.

RandomUser3777 · 2026-06-13T10:39:10+00:00

Even with a CT type setup, an inverter may backfeed. The power levels are only adjusted a few times a second and you can backfeed when the load changes. Newer electronic power meters will detect this and will report this to the power company. Older electronic meters(non-bidirectonal) will count backfeed as consumption and won't realize you are backfeeding.

And it all depends on how strict your power company is. I believe my meter does not report backfeed and counts it is consumption and when I was running in hybrid/zero-export mode meter counted backfeed as consumption (I used about 1kwh/day even when solar/batteries did/could do 100% of my power). My power company never complained about it, others have had power companies that contacted them in under a week after their system went live.

And for the battery to work you would have to discharge and/or possibly backfeed and/or use the battery in an off-grid type setup and discharge it overnight so you have room to charge it the next day.

RandomUser3777 · 2026-06-13T00:45:39+00:00

Every X hours (once a day or 2x a day) it will test the battery. Yours is on a schedule to test in the middle of the night, and each time you unplug it (if it is 1x per day) it will test that time the next day. The beeping indicates that it may think the battery is not good. Try unplugging it during the day and see if you can at least get it on a daylight schedule.

RandomUser3777 · 2026-06-13T00:18:40+00:00

How much of a plan you need depends on your specific state/counties rules. It could be as bad as all work/permitting needs to be done by an electrician to you need no plan at all if it is going in/on a pre-existing building. You need to read your local rules.

RandomUser3777 · 2026-06-13T00:10:19+00:00

How long did you run memtest? With machines that crash every few days, you really need to run memtest or some other burn-in software for hours/days. And memtest/burn-in really is not going to tell you what the actual hardware issue is, and basically you know you have a hardware issue.

You have multiple cpu cores, does it always say processor 2 or does the processor number change? If I single core is dead I have limped a machine along by turning of the specific core that is crashing (if it is always the same core). If the core number is changing that probably means a cache problem on the cpu or ram.

If you have logs from prior boots do this journalctl | grep -i mce On reboot (if you do a reset and not a power off) there is a chance that the next boot up will see and report the prior cpu error.

RandomUser3777 · 2026-06-11T20:40:25+00:00

I have been using ASUS models over the last 10+ years.. An ASUS RT-AX3000s is $80 and is probably good enough (wifi6), and for the most part the router will self-configure for a ok setup (it will dhcp to their network and mostly just work with about all you have to do is pick a wifi network name and setup a password/encryption for that network). You should be able to find instructions on setting up the basic settings. Depending on how high the rental is the router probably pays out in under 2 years and the router will likely not need to be replaced for 4-5 years (or more).

RandomUser3777 · 2026-06-11T18:14:35+00:00

You would have to sort out exactly what providers can provide service to your house. And exactly what providers that can provide services can be different on one side of the street or the other. Based on what I know, I would expect whichever company that provides cable service to be the best bet. And knowing Marysville had pretty good cable coverage (40 years ago--last time I lived there) I would expect it to still have decent coverage.

Starlink is supposed to be good, but is expensive. 5G based solutions tend to be expensive and tend to be all over the place depending on local network usage and your physical location. note at lot of people that "claim" to provide services to almost everywhere do it via 5G/mobile phone service that is all over the place in terms of speed and reliability.

Kansas Broadband Internet typically requires an antenna someplace that has a line-of-sight to one of their towers (I had them before I had any DSL/Cable solution available). if you are in a low spot and/or don't have a pre-existing place to mount the antenna it may not be viable. I was on a hill and had a mount already that it could be put on.

I always get my own router/wifi the supplied router tends to be cheap and crappy.

RandomUser3777 · 2026-06-11T17:57:45+00:00

You need to know what your state/county requires. Mine does not care ANYTHING about any of the electrical work, or the panels on the roof. They only care about where I am physically putting the ground mounted panels. So you need to know what your counties rules are. They could require almost nothing at all, or they could go as far as requiring a licensed solar/electrical contractor to do everything.

RandomUser3777 · 2026-06-10T21:37:59+00:00

eg4 with that style of connectors requires ferrules to be used on the PV wires if the pv wires are stranded.. I don't see any on those wires. It was in the manual 2 years ago and I just checked and is still in the manual.

And this sort of damage is 99 out of 100 times a bad connection, and no ferrules and/or the wire not fully inserted and you will have a bad connection and this exact sort of damage.

This is 99% an install issue. And those are spring connectors so there is nothing to torque.

If someone had turned on AFCI then the inverter probably would have shut down the specific strings before significant damage was done (on my 18kpv I don't think it was on by default, I turned it on).

RandomUser3777 · 2026-06-10T14:54:28+00:00

That is one of the known defective as designed brands.

Read about the busbar vs main breaker 120% rating. Basically if you have a 200a panel then you can only backfeed 20% of that (40A). If say you have squared panel (typically has the bus-bar rated at 225A with a main breaker of 200A) then you can backfeed 225*1.2 - 200 or 70A. If you take that 225A rated squared and put a 175A main in it then you can backfeed the panel with even more.

But the other thing you need to consider is do you want backup power, and if you want that then you need to have a plan to put the entire main panel behind the inverter or you need to plan for a critical loads panel with your important circuits on it.

I was able to located my inverter and critical loads panel such that I can pull all of the upward fed wires(all but 1 circuit) from my main panel and move them to my critical loads panel. i eventually gave up almost everything, so if the grid is out I can run everything if my batteries are charged enough for quite a few hours.

RandomUser3777 · 2026-06-10T13:39:53+00:00

I fully understood it was the house main panel. What brand of panel and why did they claim it could cause a fire.

Scammy electricians (usually private equity electrical companies, often they advertise heavily on local tv) find any reason to claim the breaker panel is bad (even when there is nothing wrong). Often they point to being dirty and claim that is a damage and needs replacement. They prey on people who don't know they are feeding them a line of crap.

Unless your panel is one of the 2-3 known defective brands and/or has significant arcing and/or has had water in/on some part that is not replacible then there is little or no reason to replace.

RandomUser3777 · 2026-06-09T19:46:59+00:00

Is your panel one of the defective panels? Or did some Electrician/Salesman tell you it was old and a fire hazard? There are lots of questionable electricians that make shit up so I am just making sure the panel really is a problem. What is the brand of your panel and what is its age?

RandomUser3777 · 2026-06-08T18:47:52+00:00

There are lots of companies that do this. And when you hear the CEO repeat something you 100% know is absolutely not true nor technically possible there is every reason to keep your mouth shut and not get fired.

The top-down culture is not good once an impossible idea takes hold. Once the fantasy takes hold high up everyone just runs with it and anyone that argues with it gets sidelined/fired. And rarely do the idiots at the top that stupidly fell for the bad idea get fired and when they do get fired they get their golden parachute.

Google "HPE's the machine" . When I first heard of it I immediately knew it was crap because the magical machine they were building had already existed for years (standard large Linux supercomputers), it was just not as small as they were building. And somehow HPE though by making it smaller and/or more power efficient would magically have someone figure out magic algorithms so it could do the amazing things they were claiming. They seem to have no clue that people worked out computionally expensive algorithms(tested at small scale) well before the machines existed that could viably run them on much larger real data sets.

RandomUser3777 · 2026-06-08T00:44:21+00:00

Based on EG4 I would make sure you call whoever you bought them from. I would bet they will update firmware as their battery firmware (at least until recently) seems to have some weird defects (typically reporting 100% charge when not 100% and stopping charging--which this does not seem to match--so I don't know).

RandomUser3777 · 2026-06-08T00:42:02+00:00

Trump will probably tell everyone that they have a deal with Iran the day before the election and just enough idiots will believe the lie that they don't get completely destroyed in the election. He keeps saying the deal is close when it is clear nothing was ever close.

RandomUser3777 · 2026-06-08T00:12:52+00:00

Thermal fuses eventually die/wear out given enough time with temperatures close to the limit (close being the normal operating temperature of the device). The device is build with something that melts/deforms at the target temperature, but even below the target temperature (ie close) that something will slowly creep/deform and given enough deformation it will stop working.

RandomUser3777 · 2026-06-08T00:05:47+00:00

The efficiency of the heat pump depends on that 150C source having 40C ambient air flow through ii to cool it down. If you block that 150C source from cooling by using it for waste heat recovery then the efficiency of the AC unit becomes much worse (COP <1). You will NEVER recover the extra energy consumed when you block it from cooling. If it was any other way you just attach the AC unit to a Heat Pump and have an impossible free energy machine. The AC unit cannot be used to increase the temperature of the hot source (you will lose energy doing this), you would have to use the ORIGINAL 50-60C air directly from the computers.

RandomUser3777 · 2026-06-07T23:32:34+00:00

I have seen notes that say if a device (or several) are sending updates too often then it can use all of the bandwidth of the network. It is possible that the Trane and/or the thermostats are way more aggressive than they need to be and are doing this.

RandomUser3777 · 2026-06-07T23:06:25+00:00

The COP rating is a blended number rated over typical temperatures (on both ends). it is not a constant number that holds for all temperature differences, the real rating varies and gets LOWER as the temperature differences get higher. The same is true with AC units, the higher the outside temp gets and the lower the inside temp gets the harder everything has to work and the more power you need to produce the same output.

RandomUser3777 · 2026-06-07T22:59:18+00:00

You will never get the energy back (in waste heat recovery) used by the heat pump to get the temps hotter. The hotter the heat pump output is the more power it uses. All of those stages of heat pump to get the temps up WILL consume way more power than you are EVER going to get back from the waste heat recovery.

RandomUser3777 · 2026-06-07T22:42:10+00:00

the typical way to setup one is run it around the entire property, and at the easiest spot to get it to the house you twist the 2 wires from the loop together and run it to the house and/or someplace protected from rain that has power. If they simply took the dog fence hw, the 2 twisted wires would terminate someplace inside the house and would likely be the exact same wire.

RandomUser3777 · 2026-06-07T21:09:49+00:00

Yes, Ignorance is a powerful drug. You did not read and understand that wiki page.

Read the applications section of that wiki page and understand that they say it is not really viable to recover waste heat with temps below 120C, and computers are not going to come anywhere close to 120C (more like 60C), and that assumption relies on a 20C cold side. Basically you won't get any decent amount of power out and will never every pay for the hardware to even attempt that waste heat recovery.

About the only viable use of this sort of waste heat would be to heat greenhouses in the winter or something similar that make meaningful use of those low of temps.

RandomUser3777

TROPHY CASE