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exploring BLUETTIi power stuff

 
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wow, the world seems to be changing at an ever increasing rate. I never knew anything like this existed until today. all in one power solution that will power just about anything in a regular house except maybe a dryer or a stove that takes 240v, but hotplate, microwave, washer, computer, phone, tv- well you get the idea.
all in one compact unit, 3500 recharge cycles-- that's like draining and charging every day for 9.5 years.
I would think these things are perfect for off grid all in one plug and play solution or even just for power backup, much less than cost of some generators that are noisy smelly and use up fossil fuels and create carbon dioxide.

here is just one I just saw a glowing youtube review about

https://www.bluetti.com/products/bluetti-ac200p-2000wh-2000w-portable-power-station

opinions? anyone?



 
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It looks like the brand name is quite expensive... This should be possible under $1000.
I am also not sure that placing heat sensitive batteries and electronics that will get hot in the same small container will help the durability of the batteries. At least it looks like it has a fan to help with cooling.
 
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bruce Fine wrote:
opinions? anyone?





This guy on youtube does detailed reviews and seems completely unbiased:


 
 
Michael Helmersson
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And then, 4 months later.............

 
bruce Fine
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he says he has 3 of them and really likes them and will keep them , sounds like about a dozen people or less reported issues they had with them to him.
but that's just 1 model the company offers, maybe there are bugs in some of the units of that latest model that need to be worked out.
the hurricane ida is coming this way, something like that I think would be great to at least keep the fridge running if the grid goes down or an easy peasy way to get off grid with a couple solar panels.
there is just so much new coming out with solar and alternative power its quite inspiring for an old phart like me.
 
Michael Helmersson
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bruce Fine wrote:
there is just so much new coming out with solar and alternative power its quite inspiring for an old phart like me.



Yeah, inspiring and dizzying. I find myself researching these things and just getting overwhelmed. I hope you don't have any hurricane troubles.
 
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Keep in mind there are different qualities of LiPo batteries. The one in my phone will last years. The one in one of my portable chargers, lucky if it lasts a year.  I've looked at the manual and specs but I'm not seeing any actual battery size aside from the 2000 watt hours listed.

You could probably put one together for a grand or less without all the touch screen stuff. I saw an ad earlier this week for a 100 Amp Hour lithium for $300 but I've never heard of the company and I can't find any real information about them.

2000 watt hours @ 12 volts is 166 amp hours, assuming the internal battery is 12 volts. That would power some devices for a few hours before charging is needed. I'd run some calculations to see what each device you can't live without uses and go from there.

I like the different ways to charge it back up but again the overall capacity of the system at 166 amp hours is fairly limited. I'd be interested to see how adding a few deep cycles to it would work.

My personal view is that I probably wouldn't spend that much for 2000 watt hours (166 AH) of capacity.
 
bruce Fine
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are lifepo4 batteries good?
 
bruce Fine
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LiFePO4 batteries are very good with 3,000 - 8,000+ recharge cycles, with a DoD of 90%
They can usually handle charge and discharge rate of 1C, a few even 2C but they really prefer 0.3C
https://documents.unboundsolar.com/media/9979990_discover-battery-aes-6.6kwhr-48vdc-with-xanbus-lithium-lfp-battery-specs-20200316232918.9979990.pdf
 
bruce Fine
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yeah--I want an off grid system for a whole bunch of reasons, but want to be 100% sure of what I'm putting together before saving up my pennies and making substantial investment.
I figure 12 volt just because if I ever decide to make mini house or go mobile--but I'm still learning about all this stuff
 
bruce Fine
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ok for give my ignorance but what is dod, dead on delivery? I have no idea just guessing. and what is 1C or 2C
I think sometimes being an old phart I just can't keep up with the current alphabet soup I see everywhere.
 
S Bengi
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DoD = depth of discharge
so if a battery has 1000WHr, a 50% DoD means that only half of it has been used, but a 90% DoD means that 90% of it has been used.
For Lead Acid Battery can usually only be discharged to 50% so even though it says 1000WHr only 500Whr is really usable but with LiFePO4 90% of it is usable
1C means that you are allowed to empty entire battery (1000WHr) in 1 hour, and the battery is okay and will not overheat or get derated. We can do that with LiFePO4 batteries but with lead batteries we aren't allowed they prefer taking 10hrs to 24hrs to empty the battery aka 1/10C or 1/24C
 
Sebastian Köln
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Bruce, I think LiFePo4 are right now the best choice if weight is not the biggest concern, and you don't operate on a massive scale.
Their don't tend to go up in flames randomly, last much longer and can be discharged below freezing (seems like charging is not suggested below freezing).
I bought a few 10Ah cells three years ago and one ended up being a night lamp. So far I have charged it twice.
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