11-09-2022, 08:48 PM | #21 |
Gone Wild
Join Date: Jul 2018
Posts: 212
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Re: Dumb Lithium question - Why some very low Prices?
So, I got my 1st response back, and guess a lot got lost in translation. I'm guessing even though they have US inventory, all sale/svc come from China. The sent me specs, manual and pics of a completely different battery. I wrote back and sent them link to battery and well see how they respond this time. Asked for number of cells, type, new-used-refurb plus compatible chargers, meters, and a user manual.
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11-09-2022, 09:38 PM | #22 | |
Gone Wild
Join Date: Apr 2008
Posts: 2,226
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Re: Dumb Lithium question - Why some very low Prices?
Quote:
being that Docan only sells 3.2v lifepo4 based batteries I think its a safe assumption its a lifepo4 pack and actually 48v.. infact most lifepo4 48v packs are actually 51v volts when down to 20% (3.2v per cell ) when they should be charged and 58.4v when fully charged (3.65v). this is one of the reasons they are touted as being such an improvement in power. you can take pifepo4 cells down as far as 2.5v without damage ive read but its not ideal for lifespan of the cells. |
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11-09-2022, 09:56 PM | #23 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Dumb Lithium question - Why some very low Prices?
Specs from the link you provided. Says 16s
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11-09-2022, 10:03 PM | #24 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,125
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Re: Dumb Lithium question - Why some very low Prices?
That's good that it's 16S.
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11-09-2022, 10:04 PM | #25 |
Gone Wild
Join Date: Apr 2008
Posts: 2,226
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Re: Dumb Lithium question - Why some very low Prices?
I saw that too afterwards... also see the correct voltage for 16 (or 32) lifepo4 cells stated at 44 to 58.4 (44 being at 2.75v per cell and like 10% reserve)
if they used 14 lipo or nmc cells the max fully charged pack would be 58.8 as well as the charger voltage to match.. this is why lifepo4 48v chargers are 58.4v and nmc are 58.8 typically. |
11-09-2022, 10:07 PM | #26 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Dumb Lithium question - Why some very low Prices?
Really the specs don’t look bad at all on that battery, assuming they’re not inflated to make it look better than it is. 180 amp discharge (assuming this is constant not peak) looks pretty decent too.
But then again with China who really knows for sure if what you’re getting is what was advertised… |
11-09-2022, 10:12 PM | #27 | |
Gone Wild
Join Date: Apr 2008
Posts: 2,226
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Re: Dumb Lithium question - Why some very low Prices?
Quote:
Like I mentioned earlier Docan has a pretty solid reputation in the DIY lifepo and solar community forums. my 230ah cells I got from them actually exceeded their 230ah rating. For the cost they are a good vendor compared to others like sunfunkits which charge quite a bit more. even Will the founder of diysolarforum.com recommends them https://www.mobile-solarpower.com/ https://www.mobile-solarpower.com/ra...eals-page.html BTW Will was the one who turned me on to the idea of a lithium solar powered cart. https://www.youtube.com/watch?v=x838bkVWLYA https://www.youtube.com/watch?v=Cvo6y1fg_y4 |
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11-09-2022, 10:20 PM | #28 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Dumb Lithium question - Why some very low Prices?
I’m not knocking them, just posing the question because they don’t specify any details on the cells really. But as I said the specs look promising especially for the price.
I’d just want more detail before dropping $1500 bucks though. It does appear to specify BYD brand cells, which would be a good thing. They do make quality stuff and are an absolutely huge company. It also doesn’t specify anything on warranty as far as I can tell. Doesn’t mean there isn’t one, they just don’t advertise it which I find a little strange. |
11-09-2022, 10:22 PM | #29 | |
Gone Wild
Join Date: Apr 2008
Posts: 2,226
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Re: Dumb Lithium question - Why some very low Prices?
Quote:
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11-09-2022, 10:31 PM | #30 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Dumb Lithium question - Why some very low Prices?
As said I’m not knocking it. It appears to be a solid battery.
I personally went with allied. Not because of the cells or the specs, I actually found it difficult to try and get any specs out of allied customer service. They are pretty tight lipped, but I went with that option anyway because of the warranty, because they’re the same size as the batteries I removed so dropped right into my battery tray and use the stock tie downs, and because of the store I bought them from (plowmans) is like 15 minutes from my house. I know Don runs a stand-up operation and if I ever were to have issues with them (which I haven’t) I’d have no problems with support from him. That to me is worth the extra $. But, ordering something from overseas, knowing how “wonderful” it can be trying to get support through the language barrier and etc. (I’ve worked with many Chinese suppliers over the last decade through work and know that battle well) I’d have to have more info before pulling that trigger. Again, not knocking the product and not insulting you or anything of the sort, it looks like a solid option. I’d give it some real thought if I already didn’t have my electric cart set up and my other cart is gas with a tractor supply battery, it works just fine |
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