Thank you for your reply, and remembering the issue.
I checked and both my Elite 30s have BMS 1087.05 following the most recent update.
I have recalibrated E30(1) again (possibly 5th or 6th time, I can’t even remember now). This is the replacement E30 for the one I bought.
I have run the same kettle-boiling task with the 300w mini kettle. There is an improvement, but I think this still needs refining to get the E30 to the same state of reliability and consistency of other small Bluetti units, like my Handsfree 1.
I got about 10.5 boils of the kettle on the latest attempt. There were 2 higher than normal % used out of the 10.5 times the kettle was boiled. Here is a list, C is degrees centigrade: 1. 90C (a.m.) / 12% used 2. 90C / 8 % used 3. 85C / 8% used 4. 85C / 8% used 5. 90C (a.m.) / 9% used 6. 90C / 9% used 7. 85C / 8% used 8. 85C / 8% used 9. 90C / 9% used 10. 90C (am) /15% used. 11. 90C / 4% used - only partial boil of about 30C as E30 ran out / shut down. If the BMS hadn’t sped up its countdown on boil no.10 it would likely have reached 11 full boils (unless it sped up on no.11 instead).
This is similar to what was achieved with the update you sent me for the original E30. Where it says ‘a.m.’ on the list this means it was the first boil of the day when the kettle was cold. I would expect a slightly higher % here (HF1 might add 1-2%), but this is again not consistent with the E30, as you can see from numbers 1, 5, 6 and 10 in the list.
Another issue is that in my experience there is no guarantee that the next time the E30 runs the kettle it will give the same results. And testing it is really becoming a bit tedious to be honest. The % jumps do not happen at the same point of SOC during different tests, although somewhere near the start and 20-30% seems common.
The results always add up to 100%, but the jumps do affect the capacity of the E30, eg number of kettle boils. I have watched what happens during the % jumps. The battery counts down the % remaining in full, but counts too fast. In my experience recalibration will not solve the issue.
It almost seems like the E30 does not have the full capacity of a 288wh battery, and has a very confused BMS that is trying to count down watt hours that actually aren’t there.
I will recalibrate my other E30 and similarly test it at the weekend. I estimate it will have pretty much the same results.
I hope Bluetti appreciate that what a customer wants is something that just works how it should as soon as you buy / receive it. I have quite a few Bluetti products and most of my experience has been unbox - charge up - update - recalibrate - enjoy. Having to deal with issues, multiple recalibrations, partially successful updates, further recalibrations and so on just to try to get the expected everyday use of a product is very frustrating
You should include the temperature of the non-heated water in your column as a constant so the test results can reflect how much energy was required to heat up the water from WHAT to 85/90C. Where is your water source coming from? For example if you had a cooler morning or it got very cold the night before, the temperature of the water will be slightly less, so more energy required to heat up the water. For example, maybe in #1 the non-heated water was originally 18c but in the test at #5 it was 20c.
@Tezzabee If I were you, I would just get a $10 wattmeter and measure useful capacity for each firmware version with a resistive load, f.e, a 100W lightbulb or boil your 300W kettle 10 times in a row.
As for me, @BLUETTI_CARE , I haven’t received a BMS update yet. Will I get it tomorrow? Just want to make sure you pushed it before the weekend.
The water is kept at room temp in a bottle. Where it says a.m would be the coldest part of the morning, with the kettle also being cold. All the following boilings until the next a.m are during the same morning.
It’s not an exact scientific experiment. It’s how I use a battery to run the small kettle on a daily basis. I’ve been doing it for well over a year. I’ve used many different Bluettis and a River 2 for the same task over this time. I would expect some slight variations of a couple of %, but not the amount I have been getting from the Elite30. All the other batteries arrived and were recalibrated once, not the half a dozen times so far for the Elite30s. The AC output reading for the kettle stays consistent, but the the % SOC reading will just randomly run down much faster at times. The other batteries do not do this. They also do not have variations of more than a couple of %. I think that shows that Bluetti’s previous batteries work well and the readings they give are pretty accurate for estimating everyday use.
The E30 is supposed to be more efficient than the other, older batteries. It also has 288wh as opposed to 268wh, so it should give more run time / approx 1 more kettle boil. It doesn’t. With the other batteries the consistency is such that I can look at the SOC and know how many cups of tea / coffee I will be able to make. Not so with the Elite 30.
The most recent update has helped. Prior to this jumps of 20-30% were common, but pretty random, so it was impossible to estimate run time for the kettle. It is still not as good as the other batteries though so I am really hoping that by giving Bluetti as much detail of a real life use situation as possible, a further, more completely successful update will be able to be made.
Hi @VSM, Thank you for your suggestion—we find it very helpful.
We confirm that the new BMS v108309 has been pushed. Please upgrade and test it afterward.
Wish you a pleasant weekend!
@BLUETTI_CARE
Upgraded to v108309, fully discharged (922Wh output from 750W load, slightly less than original 945Wh), charged, and tested. Everything is still the same, maybe even slightly worse.
SOC is at 56% rn after 24hrs of AC discharge with no load, just like it was at the very beginning.
It was at 85% after 5 hours (3% per hour on average), then 90 minutes later it dropped to 79% (6% in 1.5hrs = 4% per hour). Then I went to sleep.
The 40-watt load is still displayed as 64 watts, and the 60-watt load as ~90 watts.
I can wait another ~60 hours till it dies to measure if idle consumption changed (it was 85 hours), but I see no point. This firmware renders this unit unusable for small loads/inexperienced users anyway.
Now what? Wait an indefinite period of time for another version?
Tell Bluetti headquarters that I wish them the same experience I’m having right now - dependence on their own products with bugged firmware during extreme (in my case, war) conditions, which takes months to fix.
It is late 2025, and this is your 3rd or 4th gen of products; you have no excuse.
I wish I could just return this unit and get ecoflow delta something instead, since they already fixed their bugs (it’s been a year after their release), but I despise ecoflow even more.
Hi @Tezzabee, Thank you for your feedback.
We would like to push the latest BMS v1087.06 to your new unit. After the upgrade, please recalibrate and test it—we believe the new firmware will perform better. Do you agree to this?
Please let us know the SN code of your new Elite 30 V2, and we will proceed with the application.
Meanwhile, we have also submitted the issue to the testing department for reproduction and testing, and we will contact you once we receive a response.
@BLUETTI_CARE 1st pic, electric blanket set to 60 watts, I marked 3 indicators. Which one is lying in your opinion? 2nd pic, my pc on idle, which is ryzen 5600G with 3 fans and no videocard + Samsung S24R350 20-watt monitor. 128 Watts is a 148% increase from the factual 51.6 Watts. 3rd pic, I increased the load to ~195 Watts, which shows as 280. “Only” 45% measurement error this time. 4th pic, PC + 750W heater, absolutely spot on, no problems.
Send this to R&D and ask them if this is considered normal and user-friendly operation, and why my other 2 Bluetties (AC180P and AC200PL) are not like that.
Hi @VSM, Thank you for providing such detailed test information.
After careful calculation and review, we believe that is normal.
The difference in discharge capacity across different state-of-charge (SOC) ranges results from the combined effect of the lithium iron phosphate (LiFePO₄) battery’s physical characteristics and the Battery Management System (BMS) operating mechanism.
1. Voltage platform characteristics of LiFePO₄ batteries
During charging and discharging, LiFePO₄ batteries exhibit a distinct voltage plateau — within the 60%–80% capacity range, the voltage changes very little (typically remaining around 3.2V ± 0.05V).
2. Cell consistency variations within the battery pack
Even if individual cells are of the same specification, multi-string or parallel-connected packs can still show small inconsistencies due to manufacturing or environmental factors:
Capacity dispersion: Some cells may have slightly lower capacity than others, causing early protection triggering in the low SOC range (e.g., below 40%), which forces the whole pack to stop discharging.
Internal resistance differences: Cells with higher internal resistance generate more heat during discharge, accelerating capacity degradation and amplifying SOC display deviation.
3. Limitations of BMS estimation logic
The BMS primarily estimates remaining capacity through a combination of voltage monitoring and coulomb counting. However, due to the inherent characteristics of LiFePO₄ chemistry, this method naturally includes some margin of error.
Hi @VSM, We consider this to be a normal situation.
The LED screen of the Premium 100 V2 displays apparent power, which includes active power and reactive power. The magnitude of reactive power is not fixed and is related to the load.
The power display logic of the AC180P is as follows: when the apparent power is greater than 200W, the LCD screen displays the apparent power; when the apparent power is less than 200W, the LCD screen will display the active power.
I consider this to be quite abnormal.
Do you know what “normal” looks like? Let me pull a quote:
Explain to me in plain English, please, why can’t you make it so that it displays active power on small loads just like any other portable Bluetti model I own and/or I’ve heard of?
Why is it okay to behold 100 Watts of load and see 14.2 hours remaining on a model with a 1000Wh battery?
As for this Wikipedia post, why is the BMS estimation logic on any other Bluetti unit more accurate than that on Elite/Premium 100 and, possibly, on Elite 30 models?
And if everything works fine, why did you release a new BMS firmware couple of days ago?
Hi @VSM, this difference is caused by the preset display logic, which varies between models. Our output power and remaining runtime are provided for reference only, and we do not guarantee that every model follows the same underlying logic.
Upgrading the BMS firmware can help optimize battery charging and discharging performance, making the SOC readings more accurate and ensuring a smoother user experience.
Name Bluetti models, which display apparent power only (even on outputs <200W).
Why can’t you make that so-called display logic more user-friendly? Why does average Joe need to know the apparent power of his PC or an electric blanket? Why should my 83-year-old grandma, for whom I bought this unit in the first place, know the difference between the apparent power and active power, and take into consideration your messed-up BMS software, which results in SOC discrepancies by dozens of percent?
That’s why you need to take customers’ feedback seriously and improve your firmware, because the current one is trash. SOC readings are totally inaccurate, I explained that in the original post and also here and here.
You should consider that a significant portion of your customers will use your products in various scenarios, including small loads for many hours, not just for boiling a kettle or making toast once a year during camping.
I thought you learned from your mistakes when you released the AC180P model in early 2024 with a faulty UPS, which shut down the AC outlets at random times after the switch from the grid, and improved your testing standards, but I couldn’t be more wrong. I should’ve expected smth like that when I learned that this model had startup issues with portable air conditioners and fridges on launch.
We do not guarantee that we will continue purchasing your products at full price within a year of their release (I will never make that mistake again). If I had known this unit behaved this way, I would never have bought it in the first place. I would rather spend an extra $100 on another AC180P unit. But now I’m stuck with it because it’s been over 14 days since the purchase, and I can’t return it due to local laws. And based on the tone of your replies, any further improvements are unlikely. Your R&D is a joke.
Hi @VSM, We have now received a response from the R&D department.
They have specially developed the new BMS1083.10 and pushed it to your device. Please upgrade it and then conduct the test.
We look forward to your feedback.
@BLUETTI_CARE tested the 1083.10, and I have some good news: almost everything is finally fixed!
Some details:
AC discharge with no load - SOC at 73% after 24 hours (55% before). The percentage drop is not rapid, like it was (3-4% per hour), and is very linear.
Discharge with small loads - see pic below. I did the same - electric blanket set to 40 watts for 8hrs 7mins. Output, SOC, time remaining — it’s a day and night difference!
Output reading: now, here’s the problem - it’s not quite there yet. I feel like loads under 50W are displayed as active power, but beyond that is still apparent power, because 60W becomes 75W on the display (it was 97W before, tho), and a 130W fridge is ~200W.
Nevertheless, the SOC reading is not the ravings of a madman now, and pretty accurate, time remaining too, and the unit is more or less usable now.
I’m planning to send it to my relative in the next 10 days, so the burden of further feedback now must fall to someone else.
Also, people from my country are buying these en masse and have started noticing all of that too. You better release this BMS version in bulk, or you’ll face massive returns/negative feedback pretty soon (at least in my country, looks like no one cares in the US lmao).
Now, the billion dollar question: was it really that hard to do all of this before the release? Do I look like someone who loves to do your job for free?
Hi @lavash_bluetti, thank you for contacting us.
I have now applied to our IT department to upgrade your system. They will push the latest version of the firmware to your unit within 24 hours.
Please upgrade the firmware tomorrow. Do not connect any devices during the upgrade process.
Hi @VSM, Thank you for sharing the test data—this information is extremely valuable. We have also passed along this good news to the technical department.
Regarding your suggestion, we believe only a small number of users have encountered this issue, so we currently have no plans for a mass release. However, we will conduct further analysis and confirm our future plans.
We did conduct extensive testing before the product launch. That said, this particular issue did not arise during our tests, and we believe its occurrence is accidental. I appreciate your kind understanding.
