TLDR: when idle, the first ~45% drains too fast, the last ~55% drains too slow after 2 full cycles on the latest firmware; capacity is fine (945 watt-hours from 750W resistive load, no dead cells for sure).
Full story: received my unit, SOC was at 36%. Updated the firmware, then charged it to 100%.
Discharged it to zero with the heater set to 750W, 945 watt-hours on the watt-meter. Recharged it again (that’s the first full cycle).
Then I decided to test idle consumption with AC, WIFI, and the display always on, BT off. It took 85 hours to kill the unit (that’s 12 watts per hour). HOWEVER! After the first 24 hours, SOC dropped to 55% (an average of 1.87% per hour). It took 61 hours to drain the remaining 55% (0,9% per hour).
I recharged it again (that’s the second full cycle) and repeated the same process - turned on AC and left it for 24 hrs. It drained 44% just like the first time.
“Maybe those inaccurate readings occur only with no load,” I thought, and I was right. Discharged it again with a 750W heater; here are the numbers:
100 watt-hours used - SOC at 89%
200 wh - 78%
300 wh - 67%
400 wh - 56%
500 wh - 45% (I stopped here).
Still, SOC shouldn’t drop like that when idle; my AC180P and 200PL had adequate readings when I tested them the same way.
I haven’t tested DC because I don’t need it. But I found a reddit post which may or may not be relevant since it’s an Elite unit, not Premium https://www.reddit.com/r/bluetti/comments/1mj661j/elite_100_v2_dc_issueproblem_parasitic_draw_high/
I suspect the BMS software. It should be updated.
SN - PR100V22528000099445
Communication Board SN - IOT2527022603398
The plot thickens! Apparently, this unit has huge problems with small loads (40-60 watts).
Did more testing with an electric blanket, which has 3 modes (20-40-60 watts).
On the first pic (sry for bad quality), I plugged it in, set it to 60 watts, and was really surprised with 90 watts displayed on 100 V2 while my wattmeter had 61 watts on it. However, the time remaining (14.1 hrs) was spot on (1024/(60w +12w inverter drain)). I set the blanket to 40 watts, plugged it in through my watt meter, and left it overnight. It consumed 335 watt-hours in 8 hours (pic 2), but the SOC was at 27% which should be at 50+% (335Wh + (8*12W inverter drain) = 431Wh). Also, 100 V2 displays 40W output as 64W. It has no problem with displaying 20W output, tho.
As a cherry on top, I recorded a video with me plugging in the same electric blanket through a watt meter to my 100V2 and my AC180P, where I switched between all 3 modes (20-40-60W). AC180P has no problems displaying the true output
I bought this Premium 100 V2 for an elderly person, who is not tech-savvy and who’ll be using it mainly in the same scenarios: small loads with electric blanket + internet router + TV during outages. Now I’m forced to give away my AC180P instead, which is a bulkier, heavier, and louder unit with no WIFI, because you can’t make proper testing before releasing new units to the public. The real tragedy is that it’s a common issue among all major power station brands. Sad!
Fix your firmware!
Hi @VSM, thank you for getting ni touch with us.
The charging and discharging processes of the Premium 100 V2 power station are affected by many factors.
The discharge speed slows down when the SOC (State of Charge) is in the last 55%, and we consider this a normal phenomenon. During discharge, the internal battery gradually heats up, and the BMS (Battery Management System) will control the discharge speed at this time.
Additionally, SOC is a system-estimated value; it will be calibrated when it reaches 0% and 100%, and the capacity is not uniform across all intervals in between.
Upgrading the BMS can indeed optimize battery performance. However, we have found that your firmware is already the latest version, so we cannot push a new firmware update to you.
This is not normal when the first 45% discharges TWICE as fast as the last 55%.
I own another two Bluetti power stations (AC180P and AC200PL + B300K), none of them behaves like that under the same conditions, just as I mentioned above, nor during small loads under 100 watts, nor when having no load at all (just AC on).
It’s not normal to have 50% of useful capacity left, but showing 27% and recharging those 73% in 35 minutes in silent mode (SOC jumped from 87% to 100% instantly, literally in a second when I recharged it after the last post LOL)
Irrelevant. It went through 3 full cycles, as I mentioned above. At least do some edits to your stock answer.
Upgrading the BMS can indeed optimize battery performance. However, we have found that your firmware is already the latest version, so we cannot push a new firmware update to you.
Powerful summary. It’s almost like I mentioned 3 times that I had the latest firmware + provided screenshots.
I didn’t ask to help me with updating to the latest version; I can do it myself if there is one. The problem is, there is none.
Also, I like how you completely dodged the fact that it shows more output power than it should.
Send this topic to your R&D department and instruct them to conduct further testing, confirm all the points mentioned here, and begin working on the new firmware version. Beta will do if they can do it in a week or two.
And stop with these AI-like responses when your customer obviously knows what he’s talking about.
Btw, here’s the screenshot of HOBOTECH’s review of the Elite 100 unit (link with a timestamp https://youtu.be/K1cL36-x41U?si=tXUBF9evm-_hkiaW&t=362) where he left the inverter running for 12 hrs and it consumed 131Wh (he just multiplied it by 2 to give a 24hr estimate).
So it consumed 131Wh out of 1024Wh, but the SOC dropped to 74%
The firmware for this model sucks, and I’m not ashamed to be the first one on this planet to state the obvious. Get back to work.
Another timelapse from HOBOTECH for the reference. ELITE 30 v2 this time.
(https://youtu.be/0uLpAKfxXR0?si=fZuZnvVRQ5J4f7dK&t=339)
136Wh out of 288Wh in 12 hours. So roughly half of the capacity. And God almighty, the SOC is at 51% as it should.
Call these magicians/aliens, who worked on Elite 30, and ask them to do the same with Elite 100. P.S. Actually , scratch that. I watched slow-mo and Elite 30 “consumed” 40% in the first 6hrs, so its firmware sucks as well. Call the guys who worked on AC180P/AC200PL.
, scratch that. I watched slow-mo and Elite 30 “consumed” 40% in the first 6hrs, so its firmware sucks as well. Call the guys who worked on AC180P/AC200PL.