Excessive AC200L Power Consumption During Test

Product Discussion BLUETTI AC Series
21

Correct. The power consumption of the AC200L itself is very modest with just the unit turn on with the AC switch also on but without a load. It’s with the load that the power consumption increases dramatically.

22

Hi @electricadventure, Please note that,
1/ The total capacity of the AC200L+B230 combination is 4096Wh. To protect the battery and avoid over-discharge, the battery is not drained 100%. The discharge formula is: capacity * DOD * n ÷ (load + self-consumption). DOD is calculated at 95%, and n is 93%.
The self-consumption when AC is on is 18W. Your load power is too low, so the effect of self-consumption is quite noticeable. We recommend using a load of 1000W-2000W to test.

2/ What is the ambient temperature where the machine is placed? Extremely high or low temperatures can have an impact.

3/ You mentioned that the self-consumption is higher with a load than without, and this is normal. When the load is applied, the internal temperature rises, causing the fan to activate, which naturally increases power consumption.

Thanks to @Snips1 for the helpful troubleshooting and insights, these have been very useful.

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23

Hi,

  1. I understand. I brought them down to 0% shutdown four times to calibrate and then once to measure the consumption with a load. I’m not surprised that a load of 1000-2000W would use dramatically less consumption of power by the AC200L, however, the use I was planning was to run a room of computer equipment with solar but the batteries ideally would hold enough Wh to run the equipment for at least a day or two without strong solar - that won’t be possible.

  2. Air conditioned room with temperature of about 75°.

  3. Yes, it makes sense. I needed to understand better the consumption of the AC200L for one particular use case of mine.

Thanks to all that have provided insights on this topic.

24

I have measured similar thing with AC200PL+B300.
So, ~5380 KW*h in total. x 95% x 93% = 4750.

Drained for 14.75 hours with median drain of 300W (fridge+PC), no more than 700. Ambient temp is ~25C.
12W is self-consumption, fan was working 1/3 of the time (but it should really be negligible, 10mm fan takes upto 1W). Let it be +1W for all this time.
so 4750 - 13 x 14.75 = 4560 - that should be ideal value it can give by specification.

However, external wattmeter showed 4820 was taken by my devices.
So, actually, real efficiency for me was ~90%, better than specification, which was pleasantly surprising.

P.S. It is brand new, 2nd full charge/discharge.

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