Premium 100 V2 SOC reading problem, calibration didn't help

[George2050]

Привет!
BLUETTI Elite 100 V2:
EL100V22527008961344
IOT2531500930424
IOT v8024.11
ARM v2186.15
DSP v2200.14
BMS v1083.08
После обновления до BMS v1083.08 отображение потребляемой мощности очень сильно отличается от того что показывает ваттметр и умная розетка! Единственная потребляемая мощность, соответствующая исходящей мощности на дисплее Elite 100 V2 – это 96 ватт от лампочки накаливания в 100 ватт (96 на Elite 100 V2 и 97.2 на ваттметре).
Все остальное и по DC и по AC показывается неправильно! Разница с ваттметр и умной розеткой реально большая, как минимум в десятки ватт для небольших нагрузок. Подключал вентилятор! По паспорту вентилятор потребляет 60 ватт, имеет 4 скорости. Elite 100 V2 для любой из четырех скоростей отобразил потребление в 68 ватт (хоть на первой, хоть на четвертой скорости).

Телевизор по показаниям ваттметра и умной розетки в режиме SDR (Standard Dynamic Range) потребляет ~ 40 ватт (+/-1 ватт), на дисплее Elite 100 V2 потребление ~ 75 ватт (+/-1 ватт) и это почти двукратное увеличение мощности, которое усложняет оценку ситуации.

После выключения телевизора пультом потребление на ваттметре падает до 3.5 ватт, а на дисплее Elite 100 V2 возрастает до 82 ватт! Это нонсенс! Если это подсчет и реактивной и активной энергии, то такая арифметика никому не нужна!

Это очень огорчает, так как не дает понимания того сколько ещё станция проработает до отключения. У нас блэкауты…

We have notified our Technical Department to remove the upgrade prompt to prevent further inconvenience, and this will be completed by tomorrow.

Версия прошивки с обновлением до BMS v1083.99 не установилась! Я снова написал все данные по станции и очень прошу, чтобы технический отдел собрал исправленную прошивку для моего экземпляра Elite 100 V2.

Спасибо за поддержку!

[mr.stone]

Hello everyone,

I see there is quite some confusion about the power values shown by the power station. However, this is not a measurement error — this behavior is normal and expected.

The confusion comes from comparing measurements taken on two different sides (DC internal and AC-output) of the system:

• On the AC-output, you usually measure only the active power (W) consumed by the connected device.

• The power station / BMS measures the DC power drawn from the battery, including all conversion losses.

Example: let’s borrow the tea kettle from @Tezzabee

The kettle consumes about 300 W on the AC-output.

• The device does not have a perfect power factor (for example PF = 0.8).

• The apparent power is therefore about 375 VA (300 W divided by 0.8).

The inverter has to supply this full apparent power, not just the 300 W of active load. As a result, the BMS sees more power and more current than what you measure on the AC-output.

Why does the AC-output measurement appear lower?

Many simple AC power meters:

• Do not measure True RMS

• Do not take the power factor into account

• Average out peak currents

With non-linear loads, current is drawn in short pulses. This extra effective current does load the inverter and the battery, but it is not always shown correctly by basic AC power meter.

Conclusion

Seeing a higher power draw on the power station than on your AC power meter is normal and expected behavior.

Main causes:

• Power factor lower than 1

• Inrush currents and harmonics

In short: the BMS measures everything, the AC power meter does not.

Hopefully, this helps everyone understand why you can see two different measurements that are both true.

[VSM]

Hello, impressive wall of text, however:

@mr.stone

this behavior is normal and expected

It’s not normal since I haven’t heard about any other power station in the history of power stations that displays VA (including other Bluetti models), and that is expected by literally no one, except the Bluetti R&D department and you. Give me at least one reason why I should know the VA of my PC.

[mr.stone]

Hi @VSM,

I think there is still a misunderstanding about what is being displayed and why.

The power station is not “displaying VA instead of W” for the AC output.

What it displays is the DC power drawn from the battery. This is the value that is actually relevant for:

• Inverter loading
• Runtime estimation

By definition, this value cannot be equal to the AC active power measured at the output, because between the battery and the load there are:

• Power-factor effects
• Inverter losses
• Harmonic and peak currents

“Give me one reason why I should know the VA of my PC”

You don’t need to know the VA of your PC.

The power station does need this information, because the inverter and the battery must supply the apparent and distorted current, not just the active watts shown by a simple AC power meter. This value is derived internally from voltage, current, and power factor.

That is why:

• Inverters are rated in VA
• Current limits are based on RMS current
• The BMS monitors DC input power, not AC output power

Many other power stations hide this reality by displaying only estimated AC watts. That presentation is more intuitive, but technically incomplete. In this case, you are instead seeing the actual battery-side load.

So:

• The AC meter reading can be correct
• The BMS reading can also be correct
• They are measuring different sides of the same system

This does not make the behavior “abnormal”; it makes it more transparent — even if it is less familiar.

As a consumer, I agree that this VA-like displayed value is not always intuitive, especially with loads that have a power factor far from 1 (for example, a desktop computer power supply). Personally, I ignore the values because I understand what is being shown. Ultimately, what matters is that the power station can reliably deliver power to the connected devices.

As for other Bluetti models or other brands, I can’t speak for their design choices. Displaying only estimated AC watts is certainly more user-friendly and avoids confusion, even if it conceals some of the underlying electrical realities.

[VSM]

@mr.stone

As a consumer, I agree that this VA-like displayed value is not always intuitive, especially with loads that have a power factor far from 1 (for example, a desktop computer power supply).

Exactly

@mr.stone

Personally, I ignore the values because I understand what is being shown.

I don’t. If I’m using small continuous loads, I want to eyeball the exact remaining running time, taking idle consumption into consideration, because the time remaining on the display gives a very rough estimate (I’m pointing at you, AC200PL+B300K, which I also own). If you know active power consumption, this is the most precise method.

@mr.stone

As for other Bluetti models or other brands, I can’t speak for their design choices.

I can, because I’m the customer, and this is a highly competitive niche. Verdict: displaying the information, which 99,9% of the people don’t need, instead of the info, which 100% of the people need - it’s not how you increase your market share and get 5-star reviews.

[mr.stone]

Hi @Tezzabee,

I have also recently become the owner of an Elite 30 V2 and have tested it extensively. You can check out my results here: Follow-up — Bluetti Elite 30 V2 with High Standby Power Consumption (Final Results). Maybe you can compare them with your Elite 30 units.

---

@Tezzabee

People come to this forum for help and advice. In my opinion, telling customers their issue does not exist, when it patently does, and has been shown to over and over during tests, and without full knowledge of the issue and steps taken to try to rectify it, is not very helpful.

I have never said that the issue does not exist. I only want to emphasize that both power measurements are correct, but we need to be realistic and honest: they are two different measurements. One measures the DC current internally via the BMS, while the other measures the current externally using a cheap meter that does not account for all factors.

Moreover, the sensors both on the BMS board and in an AC wattmeter are not extremely accurate. There has been a lot of fuss about this, judging by the length of this forum post, even though the deviations are technically within normal tolerances. If Bluetti were to equip the Elite 30 V2 with the very best sensors, it would increase the cost by approximately $40–60, making the product less competitive in the market.

If having the most accurate power station is really important to you, you would probably have to build one yourself. I haven’t seen one available on the market for $200 or less.

Another issue is that custom firmware is continuously being developed for anyone who requests it. This does not really help the situation. People who truly have a problem with their BMS board should return the product via RMA so Bluetti can investigate the issue. Additionally, whether the station is a 110V or a 230/240V model also matters, as there can be significant performance differences.

[mr.stone]

Hi @VSM,

@VSM

I don’t. If I’m using small continuous loads, I want to eyeball the exact remaining running time, taking idle consumption into consideration, because the time remaining on the display gives a very rough estimate (I’m pointing at you, AC200PL+B300K, which I also own). If you know active power consumption, this is the most precise method.

I completely understand you, but the larger the inverter, the less accurate the value shown by the power station becomes under low loads. In your case, it might have been better to build your own power station or home battery. Than, you could have chosen the inverter that perfectly fits your needs and avoided this problem. I also fell into the same trap myself with a small load on a 600-watt inverter (Elite 30 V2).

@VSM

I can, because I’m the customer, and this is a highly competitive niche.

A power station a niche? If even Lidl is entering the market (The Netherlands) with its own power station, I would say it’s no longer really a niche.

@VSM

Verdict: displaying the information, which 99,9% of the people don’t need, instead of the info, which 100% of the people need

I don’t entirely agree. As long as the load is between 0–20 W or above 35 W (on my Elite 30 V2), the value is displayed reasonably accurately. Of course, there will always be circumstances where it deviates slightly, but we have to remember that this is a power station. We shouldn’t go overboard in the pursuit of perfection.

[VSM]

@mr.stone

but the larger the inverter, the less accurate the value shown by the power station becomes under low loads

@mr.stone

As long as the load is between 0–20 W or above 35 W (on my Elite 30 V2), the value is displayed reasonably accurately

I’m talking about constant loads from 100 to 350W, with short-term heavy loads over 1kW (microwave, espresso machine, kettle). I’m pretty glad with the readings from my other 2 bluettis in the ranges I mentioned above. Except for the third one (Premium 100).

@mr.stone

In your case, it might have been better to build your own power station or home battery.

Yeah, I’m not doing that, and I don’t need it because that’s not my case. See above.

@mr.stone

I would say it’s no longer really a niche.

Ok. INDUSTRY. Are you happy now?

@mr.stone

We shouldn’t go overboard in the pursuit of perfection.

I don’t demand perfection. I need a basic functionality, which all of the existing power stations DO have in this INDUSTRY, instead of the useless one.
What point are you even trying to make here? You’re just wasting my time arguing over nothing.

[lavash_bluetti]

Hi everyone!
It’s much simpler. Bluetti and other station manufacturers display a unit called WATTS on the screen. WATTS measure active power. This is clearly stated on the screen.
Best regards!

[mr.stone]

Hi @VSM,

@VSM

Ok. INDUSTRY. Are you happy now?

Our discussion ends here. I do not appreciate the way you speak to me.

@VSM

I don’t demand perfection. I need a basic functionality, which all of the existing power stations DO have in this INDUSTRY, instead of the useless one.

You are indeed asking for perfection. You need to come to the conclusion that sensors in power stations typically have an accuracy of around 1–2%. What you are asking for is 0.1%, which is no longer basic functionality. In addition, you do not understand how the composition of the current values affects what is shown on the display; this is about the Power Factor. Furthermore, you keep referring exclusively to other brands; that is comparing apples to apples and, in my opinion, not particularly meaningful.

@VSM

What point are you even trying to make here? You’re just wasting my time arguing over nothing.

Put very simply: a cheap AC power meter does not show everything, such as:

• Voltage
• Current
• Frequency
• Power Factor
• Active Power
• Reactive Power
• Apparent Power
• Active Energy
• Reactive Energy

It usually only shows:

• Voltage
• Current
• Active Power

And some AC power meters also display frequency. The BMS uses all of these values, and that is what is shown on the power station’s screen. So my point is that both readings are correct: those from the BMS (measured internally and displayed) and those from the external AC power meter.

But this is where our conversation ends. I wish you happy holidays and a happy new year.

[mr.stone]

@lavash_bluetti

Hi everyone!
It’s much simpler. Bluetti and other station manufacturers display a unit called WATTS on the screen. WATTS measure active power. This is clearly stated on the screen.
Best regards!

Hi @Lavash_bluetti,

Yes, the device does show watts. However, some people have questions about how these values are derived, calculated, and displayed on the power station’s screen.

They measure externally using an AC power meter and rely on data from that device, while the BMS measures internally and displays those values on the screen. The issue is that, in some cases, the values do not match because the power factor is not perfect, which can cause the power station to display higher wattage values.

People performing these external measurements often use inexpensive AC power meters that do not account for the power factor or other factors in the final displayed values. They then compare their externally measured values with the internally measured BMS values, and these do not always match. That is what this entire thread is about.

[mr.stone]

Hi @Tezzabee,

Sorry, I think we’re not on the same page, and I don’t fully understand your issue. Do you happen to have your own thread about this problem on the forum?

If so, could you please send me the link to the forum thread, so I can read your posts and better understand your situation.

[VSM]

@mr.stone

Our discussion ends here.

Finally. I stopped reading here btw

[Scholar]

Hi guys! What was the actual full (from 100% to 0%) capacity of your Elite 100 v2 measured by power meter at AC output?

[VSM]

@Scholar with 750W load from the heater, I got:

• 945Wh on BMS v1083.07
• 922WH on v1083.09
• haven’t tested it on v1083.10

[tempal]

Hi @BLUETTI_CARE
Have a similar issue with incorrect values on display

Can it be fixed?
EL100V22526000353216
IOT v8024.12
ARM v2186.16
DSP v2200.14
BMS v1083.08
Thank you!

[tempal]

@BLUETTI_CARE and in current state it starting to charge even when it’s connected to grid and AC load connected to station, so again - no passthru mode even for AC load? For DC, as I understand, there is no passthru mode, ok, but for AC - it was there, but now - after some time station starting to charge from 99%
Please give me confirmation that this behaviour is expected
Thank you!

[VSM]

@tempal

after some time station starting to charge from 99%

That’s normal. The station still uses some power for its own needs (~12 Watts for this model) even in passthrough mode, draining the battery, then recharges to 100%.
I have AC180P and AC200PL, and they do the same. I don’t think you can make it so that all internal electronics shift self-consumption from the battery directly to the grid (well, that’s my guess; I never owned an Ecoflow/Anker, etc.).

[100v2]

@BLUETTI_CARE received my elite100v2 5days ago. have been testing.

dc & ac idling loss is actually perfect. (wifi/bt/screen all off) DC losses 0.5% an hour, AC losses 1% an hour. very linear drop. In line with official words from bluetti, 5-6watt idling for DC 10-1 watts idling for AC.

display Active power is wayyy off. starting from 40w and on. Some examples
wattmeter - 41 watt → bluetti shows 75 watt
154 195
355 462
561. 776
795 953
897 1039
1741 1958

which module controls display wattage? ARM or DSP or BMS? need this updated

[Pletenets]

Аналогичная проблема с корректным отображением мощности есть и в модели premium 200v2

Но меня ещё интересует вопрос потребления энергии из сети,когда стоит режим ups custom и стоим по времени розряд АКБ,то станция из сети потребляет от 20 до 120Вт и при этом на дисплее 0
Нагрузка на станции около 100-200Вт
Что это за паразитные потери?зачем

Вот на фото пример,идёт розряд АКБ,но и из сети 44 Вт потребление
Почему так
Когда UPS standard,заряд 100% то потребление из сети 3Вт
Это в принципе допустимо