Bluetti AC300 Solar Power Station DIED

Bluetti AC300 Solar Power Station DIED - Can I Fix It?

Рет қаралды 8,442

Күн бұрын

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@ProjectsWithDave 5 ай бұрын

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@DavidSmith-fb4vh 4 ай бұрын

Thanks! I used a Bluetti 500w charger and it worked.

@ProjectsWithDave 4 ай бұрын

Thanks! I appreciate the support!

@DavidSmith-fb4vh 4 ай бұрын

I bought the Bluetti 500w charger and PV yellow plug adapter and used it instead of the EG4 chargeverter. $150 vs $500. Worked great. Thanks for the info.

@ProjectsWithDave 4 ай бұрын

I used the EG4 charger because I had it available. I should have mentioned any 48V charger will work. I'm glad it solved your problem!

@MatthewYBarbo 4 ай бұрын

Talk about being handy! I found it very interesting to see what the inside of that unit looked like. Hopefully you didn't have too much trouble putting it back together. Very educational, and I'm sure that will certainly holp someone out who's past their warranty. Great job!

@SamLivingLife 5 ай бұрын

Why did the BMS not keep it from over discharging? Seems like a design flaw.

@simon359 5 ай бұрын

I believe you have to change the settings parameter?

@kuhrd 5 ай бұрын

It went low and the BMS shut it off. Then as the unit sat not getting any power from the input during extended cloudy weather the BMS and the self discharge of the cells slowly pulled the battery down even further to a point where the cells were too low and the BMS shut down to protect the cells. When that happens, it often requires charging the battery directly, bypassing the BMS in order to bring it up enough to wake the system back up. This can happen to pretty much any lithium battery with a BMS. This happens a lot on smaller batteries used for power tools and other multi cell devices where the whole pack or possibly one cell gets to low and the BMS shuts down and the charger won't wake it up because the BMS has to be running for the battery to take a charge.

@mondotv4216 5 ай бұрын

@@kuhrdThat should never happen with a quality BMS. It will shut down the battery with 10-15% still in the cells and they should be able to sit like that for well over a month. The self-discharge rate for LiFe is between 1 - 3% a month - quality cells at lower temps less than 1%. The inverter should also ensure the cells are maintained.

@kuhrd 4 ай бұрын

@@mondotv4216 Many BMS units have a setpoint where they will shutdown the entire BMS in order to protect the battery. In this state some will not power back up even if you apply power until the batteries are above a certain trigger voltage where you can get the BMS to power back up. Most BMS units that are part of a prebuilt battery or power bank are programed to discharge to 0% SOC which for LiFePO4 is around 2.5-2.8V and then they will shut the BMS down if the charge on the lowest cell goes much below 2.0-2.4V (varies by manufacturer) but when the battery is this low on the charge curve the voltage is dropping like a rock so 1-2% below where the BMS shut down is all that it might take to bring the voltage below 2V. Very rarely will we see any manufactured units that will shut down with 10-15% still in the battery since then they can't market the biggest numbers. Some BMS units will have a recovery circuit where they detect charge coming in and trickle charge the battery through a diode and a resistor until the battery reaches a safe level to start back up and take a regular charge because the BMS needs to be running to engage the charge MOSFETs.

@FuncleChuck 4 ай бұрын

Very much seems like a flaw, yeah

@jw3843 5 ай бұрын

This is not the first time I have heard of the bms shutting off on the external batteries for bluetti products. Usually you can wake it up by providing voltage to the bms, I have seen people recommend leaving it on the ac charger for a day and see if it comes back, but you cannot use the charger through the main unit, sometimes people recommend using a battery of the same voltage to do it. But in this case it is probably best to charge the battery directly since it was that low. Very nice to see how it is done. I do not have any of those units, I do have the ac180 and no problems so far. I have other brands of units and I am sure all of them will do this eventually.

@ProjectsWithDave 5 ай бұрын

I think you will have no issue if you keep the unit from reaching the "over-discharged" state.

@lua-nya 4 ай бұрын

@@ProjectsWithDave only problem I see with that is that such a thing is not user's work but BMS' work.

@laloajuria4678 5 ай бұрын

serious incredible work. will definitely help someone out there.

@chuckw302 22 күн бұрын

Sir!! you’re a genius!

@SolarMinerPH 5 күн бұрын

Happened to my unit too and its been doing it multiple times that I added an xt60 connector at the back so I can wake it up without disassembling the back part 😁 I think this is a flaw because it shouldn't discharge as fast as it should even when the unit is not turned on.

@ProjectsWithDave 4 күн бұрын

I haven't had any further issues with mine. Have you updated to the latest firmware?

@stevenfrazier8939 5 ай бұрын

Why does the Bluetti BMS allow the system to discharge so low that it can't recover on it's own? We have two of the 2nd generation JK-Non-Inverter-BMS (B2A24S20P) and four of the 3rd generations JK-Inverter-BMS (PB2A16S20P). They are 200 amp with 2 amp active balancing and Bluetooth and they will prevent each of the 15 kilowatt DIY batteries from discharging below a safety set point.

@kuhrd 5 ай бұрын

I am guessing that it sat discharged and the BMS along with the self discharge of the cells caused the BMS to shutdown. If it would have been recharged right away it may have recovered on it's own. If they would have marketed it with a lower capacity they could have left a larger reserve at the bottom to keep the BMS alive during an extended low voltage scenario. It very likely was a marketing choice that they made because line must go up. On my home system I have 48KWh of storage and I keep the main system bus at a voltage near ~20% capacity with an inverter transfer setting for this very reason since during the winter I can get days in a row with snow covered panels and grey skies so I have to keep the system lifted at the bottom so the BMS's don't kick out when a large load kicks on when the batteries are low. If I did not have this the BMS units are set to kick out at 0% SOC and if I had a week or 2 where I was not home with no sun the BMS units and the self discharge of the battery cells could leave the system in a position where it won't recover without manually bypassing each BMS for a few minutes to get every pack back up to a point where the BMS can take over.

@ProjectsWithDave 5 ай бұрын

Right, I left it too long fully discharged and there was no line or PV source to charge back up or it would have recovered on it's own.

@lenwhatever4187 4 ай бұрын

There is no reason it could not be designed to recover but it would require extra circuitry. Extra circuitry that most users would not notice in the life of the product.... It appears that the power supply for the control electronics is only from the batteries. There is no reason the AC (or even solar) charging system could not also be used as control power and at the very least offer diagnostics (battery too low). Of course once the control circuitry knows the battery is too low and by how much... even on a cell by cell basis, it could take remedial action all on its own. I suppose the warranty doesn't cover letting the battery go that low anyway. Still, It would not be _that_ much added circuitry. Honestly, it is just one more reason for me not to buy an all in one.

@ProjectsWithDave 4 ай бұрын

I agree, I think it could be programed to recover from this condition. Hopefully manufactures take notice of these kinds of issues and continue to mature the products to prevent even these unusual situations.

@WiSeNhEiMeR-1369 4 ай бұрын

THANKS COOP ...

@ProjectsWithDave 4 ай бұрын

Thanks for watching!

@Electronzap 4 ай бұрын

They don't want people fixing it, and they don't want people sending it back to be fixed.

@HotMannaMinute 5 ай бұрын

This same thing happened to my ac200, alsoMy bluetti ep500 fried and the screen doesn't work. This is why I go with ecoflow now.

@hardtruth2039 5 ай бұрын

EcoFlow has the same problem. I own several and they require battery maintenance like all of these power stations do.

@HotMannaMinute 5 ай бұрын

@@hardtruth2039 ok, thanks

@ProjectsWithDave 5 ай бұрын

I think you will find any power station will have this issues if left fully discharged too long.

@terryrodbourn2793 4 ай бұрын

just train yourself not to let go under 20% and then change it again! If you have multiple cloudy days use the grid to charge t in some until nd sunny days comes long to charge it fully!

@jamesl6365 18 күн бұрын

Not sure what fried means exactly, but I may have a solution for the EP500: Check on the DSP & ARM firmware. If you have bluetooth enabled, and it's got any signs of life, I had this problem (screen not working, but could control via phone/computer (and technically the touchpad was working, just no display so good luck on anything more than AC or DC on/off) and contacted Bluetti, and they said update the firmware... and for once it did work. (Doing IT stuff for decades, that was a literal Holy Shit moment, because it never works.) AC300 just checked now, and ARM is 4032.11 and DSP is 4031.3 (That was updated later as that version enables the adaptive charging if you have a slightly noisy input, like charging off a car inverter.) Hope that helps if you try it.

@andymonteros1331 2 ай бұрын

Would it be a similar process for a ep800 battery? To get it repaired. I recently purchased the bluetti ep800 with two batteries. One battery came over discharged. Bluetti said to send it back and they will replace it, but I'm outside the US and shipping it back will be a pain. Any idea on how to repair?

@ProjectsWithDave 2 ай бұрын

The EP800 is a much higher voltage battery. It would be much more dangerous and you would need a higher voltage charger.

@andymonteros1331 2 ай бұрын

@@ProjectsWithDave Just how much voltage would be needed? To get it charged.

@TheCornucopiaProject-bd5jk 4 ай бұрын

I have a 4 year old EF Delta 1300. I know the cycle life is down down fast, being NMC chemistry. Would love to replace the battery with LFP Cells. Any suggestion for such project ?

@unusedusername-o7f 4 ай бұрын

Did the solar controller built in to the battery not work for low-voltage recovery? You should be able to connect an external DC power supply between 12-60v to the solar input that is located on the side of the battery itself to recover the battery as long as the voltage in the pack does not become low enough that the lights on the front of the unit do not turn on at all.

@ProjectsWithDave 4 ай бұрын

The BMS disconnected from the battery so no charging input could deliver power to the cells.

@suklee1400 4 ай бұрын

As always, great and useful content Dave. It seems like your over-discharge problem would have been a good excuse to buy a new B300. Do you agree that that would have also solved your problem? Would you then have been able to recharge the over-discharged B300 without dissassembly? Finally, if you had sent the "dead" B300 back to Bluetti under warranty, wouldn't they rightfully be able to charge you for two-way shipping because the problem was mostly user error? I believe Bluetti may have "fixed" your problem and simply sent your newly recharged B300 back to you gratis. They have been pretty generous in the past. I have an AC300 and 4x B300's, charge from solar only, and have been running house loads for nearly 2 years without any problems, except for ones I've caused myself.

@ProjectsWithDave 4 ай бұрын

Generally speaking I think Bluetti has the best software control options for this size system and I like the way it operates a lot. An additional B300 would not have fixed the problem, the B300 batteries themselves would not allow a charge. They offered to ship them back and fix them, but then I would not have known for sure what the problem was. I felt like I owed it to my viewers to do the full investigation myself. Turns out it was nothing earthshattering, just an over discharge condition.

@hardtruth2039 5 ай бұрын

This is a typical issue with all of these “solar” power stations. People don’t read the manuals and don’t follow the instructions. These are not dummy proof. The sad thing is that they could be. Be very careful with what you are buying and do plenty of research.

@RichardClarke-l1i 4 ай бұрын

Hi I have a small unit zerokor my Ac outlet not working have any idea on fixing it

@ProjectsWithDave 4 ай бұрын

If the AC outlet isn't working it could be a fuse or the inverter is bad.

@lasersbee 5 ай бұрын

How did the battery voltage get so low ??

@ProjectsWithDave 5 ай бұрын

I forgot the AC input was disconnected for an experiment and the solar panels were covered in snow for a couple of weeks. Also temperatures were only just above freezing.

@timtrampenau3050 Ай бұрын

So you had the AC300 plugged in to solar and A/C and it still over discharged, is this because you set the user parameter battery threshold too low at 10%, why would Bluetti allow a set point that would cause this to happen, the load should automatically disconnect if the battery is about to shut down. With all this fancy programming this thing should be just about bulletproof from over discharge if it’s plugged in to A/C. These power stations are pretty convenient all packaged up but the more I read about the complaints the more I think one would be better off building your own from off the shelf components. Lastly when you had the unit all apart why not add an XT60 plug sticking out the back that directly tied to the battery. Cheers and good luck.

@jasonbroom7147 4 ай бұрын

I have to do something quite similar with a 70 Mai Terra 1000 power station, if I let the SOC get to zero.

@ProjectsWithDave 4 ай бұрын

It seems like there should be a way to have the BMS recognize the over-discharged situation and pull out of it.

@Ekanselter 4 ай бұрын

This issue is going to disappoint a lot of people that are planning to depend on these units in a grid-down scenario. Does Bluetti warn of this specific issue in the user manual?

@ProjectsWithDave 4 ай бұрын

Yes, all the manufactures of these systems warn against leaving the system fully discharged for any length of time. They all recommend storage at 50-80% SOC.

@latymz 4 ай бұрын

Same thing happened to my ac200p. That was it for me. I have the eb240 and 150. Both have worked without issues. They are actually work horses. But I don’t trust anything beyond those 2.

@ProjectsWithDave 4 ай бұрын

What did you do with the AC200P?

@latymz 4 ай бұрын

@@ProjectsWithDave I recorded the event and sent the video to customer support. They replaced the unit.

@ProjectsWithDave 4 ай бұрын

That's good. They offered to replace mine as well, I just wanted to figure it out myself.

@latymz 4 ай бұрын

@@ProjectsWithDave i totally understand the curiosity.

@simon359 5 ай бұрын

Can you charge these batteries using a 12 V charger? Something like a Victron charger.

@kuhrd 5 ай бұрын

You would need a higher voltage supply/charger and the ability to adjust voltage and current since the pack voltage appears to be 48V

@simon359 5 ай бұрын

@@kuhrd How about just to wake it up? Then plug it into the wall or use solar panels.

@ProjectsWithDave 5 ай бұрын

The problem is the system voltage has dropped too low to initialize the BMS so It won't turn on to charge. You have to directly charge the batteries with an external charger.

@JayWye52 4 ай бұрын

@@ProjectsWithDave if this could happen again,perhaps you should just install a direct-to-battery terminal set to hook u[p your external charger. (modification) instead of taking it apart every time. I suspect an inexpensive 48v 2A e-bike smart charger would do the job,for those not having that big charger you have.

@iohann.bab.7042 5 ай бұрын

It's better to build your own system,these hi frequency power banks won't last for every day use all brands have the same problems.

@markeh1971 4 ай бұрын

Hi, if you make it yourself and it’s modular then it’s easier to diagnose. For an all in one, like this you need to accurately diagnose the issue and then rectify it. DC inputs not going directly to battery made it harder and not waking the BMS is an issue. Take care, nice video M.

@thomasbezak1090 4 ай бұрын

So you just need to have a $500 48 volt chargeverter on hand becasue the BMS cant reboot itself off shore power? Yikes.

@ProjectsWithDave 4 ай бұрын

Ideally you don't let it sit for weeks in the cold fully discharged and you you won't have this problem. Also, there are some cheaper 48V chargers that are sufficient to do the trick.