Elite 10 discharge too quickly

Product Discussion BLUETTI Elite & EB Series
1

Greetings.
Last time our new Bluetti Elite 10 started to discharge to quickly in my opinion.
We bought 2 months ago. We bought it because have power outages a 3-4 time in a day (living in Ukraine, you should understand why). Using to power the router and PoE ONU terminal. Router Asus RT-AX53U (2-channel Wi-Fi, 2.4GHz and 5GHz) consumes up to 12V 1.5A max. ONU terminal - 12V 0.5A. These params are from charger blocks so the average consumption should be lower.
Average shedule of using: 4 hours using to power the router with ONU terming and 2 hours with simultaneous charging and power supply.
At the beginning of operation it could hold more than 5 hours (I didn’t check more).
I observed how fast Elite 10 discharges and that’s I got. With average power consumption of 6-7W (as shown on the Elite 10 display during the entire observation period) it discharge in 4:25:00. But I think it should give power a twice long. If simpify calculation, with 6-7W power and 128Wh Elite’s 10 capacity it should work 128/7=18 hours. Even if concidering voltage trasformation from battery voltage to output voltage 12V, for expample 20%, so it still should be more: (128-20%)/7=102.4/7≈14.6 hours. So it look’s like Elite 10 lost a half of capacity.

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Also tested Elite 10 while charging my notebook. During the entire test I watched 1 stream at browser and didn’t do anything else, so a load on the power station should not have fluctuated.
Calculations. With average power of 80-90W from notebook (this Elite 10 showed) the power station with 128 Wh capacity yould work a little more of 1 hour, 128Wh/85W≈1:30:00. Even if substract 20%: 128-20%/85=102.4/85≈1:15:00. But our Elite 10 discharged a twice faster, in 30 mins. Here a discharge observation graph with station’s load:

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Also I tried to calibrate BMS as it described at manual: full charge without load, full discharge to 0, repeate 2-3 times. It didn’t help.

What happend with our Elite 10? Is it have bugs or just become broken? How to fix it?

P.S. Sorry for my bad English.

2

Kerion, I feel for your power issues, we see what is happening in your country re power issues. I’m in Australia.

Your power usage is very low for these devices, I think you will find that your Elite 10’s, "Self Consumption is equal to, or possibly higher than your actual loads. So this needs to be considered with overall consumption.

First there is around a 10% efficiency loss when using the inverter, all power stations suffer this loss, but Bluetti are among the most efficient. Then you need to add the power from the Elite 10’s battery, to power it’s display, Bluetooth, WiFi, BMS and other electronics.

I know there are extreme limits to what you can source in Ukraine, but what I do here is use 12VDC adaptors for low load AC appliances. i.e. I use a cigarette plug adaptor for my laptop and power from DC. My mobile phones all charge via USB-C as does my Tablet. My Starlink Mini is powered from USB-C 100W. Even my LED lighting is run from 12VDC. Although my Router is powered from a charging block from 240VAC, I could run it from 12VDC using the correct plugs. This means you avoid the inverter loss by leaving it switched off.

This may not help given your situation, but hopefully explains the Elite 10’s discrepencies. Mike :slight_smile: