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Teardown of the EcoFlow Delta Pro 3.6kWh portable/home LiFePO4 battery solar inverter/generator.
Back in the old EEVblog garage!
Use coupon code EFPROEEV100 for $100 off until October 31st
EcoFlow factory tour:
00:00 - Back in the old EEVblog garage!
00:30 - EcoFlow Delta Pro LiFePO4 battery solar inverter/generator
06:31 - Possible cooling issue with multiple units
06:57- Teardown
10:50 - It's built like a brick dunny
12:06 - These mains spade lugs are dodgy
12:45 - Extra battery input PCB
14:13 - Front AC and USB output PCBs
16:22 - AC output PCB
17:18 - The battery cage
18:01 - EV charger connection
18:38 - Solar MPPT controller PCB
21:55 - Inverter and charger PCB
24:04 - Getting to the battery PCB
25:13 - Battery Managment System BMS PCB
29:04 - Measuring the battery pack voltage
30:03 - Charger/Inverter PCB up close
33:00 - Battery pack PCB
35:09 - Conclusion
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20 thoughts on “Eevblog 1499 – ecoflow delta pro 3.6kwh portable battery teardown!”
  1. Avataaar/Circle Created with python_avatars Bart Zuidgeest says:

    We don't call a car expandable because we can have multiple units. But we do when it's a battery? That's weird. Expandable is when you expand the original unit not when you put two separate units next two each other.

  2. Avataaar/Circle Created with python_avatars Brian Hougaard Baldersbæk says:

    So…. I can use 3.6 KWh from the grid and pay a price of somewhere between $1 – $2 – $3 or I can go get this thing for one, two, three, four thousand times as much ?

  3. Avataaar/Circle Created with python_avatars 3UZFE says:

    Its a shame things like this can't be fully manufactured in Australia with all Australian parts.

  4. Avataaar/Circle Created with python_avatars Josh Jones says:

    I'm not real impressed with the thermal management on the main converter board. I suppose it could be the camera angle, but it looks as if a few of the large heatsinks don't get much air. Meh…maybe that's why you noticed louder than expected fan activity.

  5. Avataaar/Circle Created with python_avatars UKHeliBob says:

    Did I miss the notification that this video promotion had been paid for ?

  6. Avataaar/Circle Created with python_avatars Okurka says:

    This thing costs about AU$1800 per KWh; mains electricity costs about AU$0.27 per KWh in Sydney.
    You'll need to fully charge it via solar more than 6500 times to recover the cost of this device.

  7. Avataaar/Circle Created with python_avatars Saeid Yazdani says:

    You know energy crisis and blackouts are real when Daves goes full ham on this battery

  8. Avataaar/Circle Created with python_avatars SignallerK says:

    Why do they use so many glued together ferrite rings? Does it have any advantage compare to using just a bigger one?

  9. Avataaar/Circle Created with python_avatars ats89117 says:

    A system of cells interlinked, within cells interlinked, within cells interlinked within one stem.

  10. Avataaar/Circle Created with python_avatars pomonabill220 says:

    I hate spade lug connectors! They are never tight, and they like to loosen on their own, get hot and fail.
    There are some good ones out there, but still they are spade lugs!
    Thank for the great teardown and peek inside!

  11. Avataaar/Circle Created with python_avatars GameTec_live says:

    the wifi module looks like an esp 32 which is also bluetooth capable, so idk why the bms has a bluetooth module…

  12. Avataaar/Circle Created with python_avatars Virtual Insanity says:

    That Anderson connector is a fail.
    Not orientated in any way that one could plug in a typically configured Anderson plug.

  13. Avataaar/Circle Created with python_avatars TYPE xxi - WOLF says:

    BATTERY quality is the real king you need to know very well

    which you will learn fast, once your battery has died and you see the 8000€ bill for a replacement one in an e-GOLF from 2018 with less than 100 000 km

    At the end you invest a huge amount of money into the uncovered (as most youtubers are not risking to get there into the darkside of battery),
    the LiFePo4 cells of unknown brand and quality which will be key for the value you get.
    Just to put into persepective: you will be screwed if these cells break or suffer or do not or no longer deliver cause the manufacturer does not care

    The e-GOLF had been under battery warranty but you would never have thought that an e-GOLF battery would die that soon and over night. You can not ride anymore, the dealer does not know anything, VW technicians will have to check things and than it takes another age or week to get a spare.

    AGAIN: in the home country of VW just 200 km away of their HQ, not in any third world country but at the end after 2,5 weeks it is running again an nothing to pay

    but of cause: only for those cars who had always been in the VW dealers maintenance, not a cheap garage. But luckily VW maintenance is quite cheap for an e-GOLF with more or less 150€ per year by average.

    I hope that one fine day someone will spend his dead unit to a full tear down of the battery pack cause there is where your money is going into or not, this determines the amount of kWh you might be able to get back from your solar powered device. They tell you that they will be able to get 6500 cycles x 3,6 kWh or roughly 23.000 kWh out of that battery which equals about 18 years of daily use by 1 full cycle.

    It would be nice to see the genuine QR code to get behind the chinese myth in which week these cells have been made and by whom.
    They do not mention the manufacturer of the cells the point , where the money should go to last. And the have a really high claim with 6500 cycles which is an awfull lot only a few cell manufacturer do talk about, only the more famous chinese top 10 brands like EVE. Eve mentions for the LF280K (280 Ah , but the K is the key for the cycles cause only this K version is delivering 6000 cycles at 0,5 C rating or 140A discharge).

    The quality of the cell is the still complete unknown dark spot , so a questionable product considering you might invest some thousand € and 66% of the value can go into that pack where you have right now no clue at all what you are getting, no brand mentioned.

    The cells are not just 1 part among many others of similiar value, they are the most expensive parts of the whole product and not known for being replace able or covered by an 8 year long lasting warranty . So be aware how badly you suffer if things go wrong with a brand that is pushing hard on youtube but not willing to tell you the cell manufacturer or not willing to tell you if they had bought cheap crap cells for you that go crazy in 5 years and they will not care or will they replace such heavy battery pack and cells where shipping alone will be a fortune: our 8 kWh cells from EVE (16S or 51Volt) came about 1300€ and about 300€ was shipping, so 1000€ for cells alone

    Imagine they would get the cheapest, used cells from chinas alibaba dealers and put those 2 year old into your delta ecoflow which you would not see nor recognice until you would do a full tear down of the battery cage to check the valve seals and the QR production code?

    We have seen that before even in sunny australia if you check out the channel off-grid garaga and the SEPLOS MASON 6.9 battery he had gotten as a diy kit with everyhting in the box, bms, case, display, screws, nuts and cells.

    And it was a scam: the cells delivered in this kit which arrived in june 2022 showed a qr code which said: produced 2019 in some obscure chinese factory

    A 2500€ diy kit with old outdated cells produced 3 years ago not getting close to the promised capacity or better 5% lost is not want anyone wants.

    SEPLOS is famous for its BMS which is capable to talk different CAN BUS dialects for about 15 inverter brands but in their DIY rack build battery business they are scamming you cause they claim to ship you a brand new one, not a 3 year old one they could get for cheap on the chinese market and replace the brand the next batch from october on with yzx instead of xyz.

    Be carefull to invest your money in such a product with this bad attitude to not letting you know the brand of the battery cells nor modell numbers cause they have something to hide. VW spare battery (means they get the old for a new) were quite cheap considering that 8000€ included the full exchange which is a 31 kWh battery to put things into perspective if you check the eco flow price cause the eco flow battery capacity is roughly 9% of that VW battery or 1000€.

    You will learn the hard way what a crap such product can be if you have no manufacturer or warranty service close to you cause if you have to ship this battery to some place anywhere in europe your first fortune will be gone.

  14. Avataaar/Circle Created with python_avatars Mark's Tech Channel says:

    Good video! The color temperature of your fusion lighting setup in the garage studio is just right. 😀
    What are the rectangles all over the battery board with HSnn reference designators?

  15. Avataaar/Circle Created with python_avatars HL65536 says:

    Oh that's some power electronics p**n!

  16. Avataaar/Circle Created with python_avatars Fryday M. says:

    Use rubbing alcohol, or acetone to clean top of chips from the conformal coating.

  17. Avataaar/Circle Created with python_avatars Michael Brown says:

    When I was maybe 13, my grandfather and I were chatting. 3.6kwh, he says, "3.6kwh means you can draw one kilowatt for 3.6 hours," and I said, "or 3.6 kilowatts for one hour, right?" And he looked so dumfounded. He says, "well yes. Yes, I guess it would.." that was one of the only times I really felt proud for stumping my gramps. He had never thought about it that way. Now, I assume thats true for full draw of the power cell. But, BUT! you must consider the circuitry between the cell and the output. That, i am willing to bet, will not stand for 3.6kw for one hour. Interesting topic.

  18. Avataaar/Circle Created with python_avatars Kenneth Chan says:

    I was looking at their website today, thanks for the teardown… I'm surprise they included a solar MPPT controller they could have saved a hundred dollars, euro.

  19. Avataaar/Circle Created with python_avatars William Snyder says:

    The vertical spades sometimes have a tab that needs to be pressed to remove them. Not sure why the right angles dont have it

  20. Avataaar/Circle Created with python_avatars Adrian Bolden says:

    Wow, an actual BMS that looks good! they've done a nice job on this…. the two power resistors in series are the "pre-charge" circuit if the pack ends up low-voltage. That most likely indicates that the BMS IC is a Texas Instruments part which supports pre-charge. The secret button is likely the "wake" button for the BMS… Specific TI chips need a wake button after assembly before they start evaluating the cells. It's an assembly feature.

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