Charging time on Bluetti Premium 30 v2

Product Discussion BLUETTI Elite & EB Series
1

I’m experiencing what looks like incorrect BMS behavior on a BLUETTI Premium 30 V2 and wanted to check if others have seen similar issues.

1. Charging time always shows 99.9h (on device screen)

No matter the input power (100W, 200W, 300W), the station display always shows 99.9 hours to full charge.

However, the mobile app shows correct charging time.

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IMG_20260318_233452_5994096×3072 2.17 MB

2. Incorrect power draw and runtime at low loads

At low loads (8–30W, e.g. laptop via AC), the station significantly underreports power usage and overestimates runtime.

Example:

  • Device shows ~16W load
  • Estimated runtime ~9 hours→ This equals ~158Wh, while the unit is rated ~320Wh

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IMG_20260318_1949204096×3072 3.28 MB

IMG_20260318_195628
IMG_20260318_1956284096×3072 1.85 MB

Both the device and the app show the same incorrect values.

At higher loads (130–150W, e.g. TV), runtime estimation (~2.5h) matches expected capacity.

Cross-check:

The same laptop connected to another power station shows ~34W consumption.

IMG_20260318_195028
IMG_20260318_1950284096×3072 5.18 MB

If we use that value, 9h runtime matches ~320Wh — meaning the issue is likely incorrect load measurement, not battery capacity.

3. Troubleshooting already done

  • Firmware updated to latest version
  • BMS calibration performed twice (full charge → full discharge → full charge, no load)

Screenshot_2026-03-18-23-33-12-490_net.poweroak.bluetticloud
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Screenshot_2026-03-18-23-33-18-263_net.poweroak.bluetticloud1220×2712 132 KB

Issue persists.

This strongly suggests incorrect power measurement by BMS at low loads.

Has anyone encountered similar behavior on BLUETTI devices?

2

@AndreyTavrel , Have a read on this thread.
https://community.bluettipower.com/t/elite-10-discharge-too-quickly/42300
The power station’s self consumption when using low loads can often be higher than the actual load. (This is not displayed). The display you see on the App or Unit is the power being provided to the device and is slightly more than what it draws, this is a part of the efficiency factor. This is also affected by turning on both DC and AC load buttons, even without anything plugged in. Here both DC and AC loads will display zero, but there are background loads just for the power station to be switched on, i.e. bluetooth, wifi, inverter and the display itself.