Performance of Nano Carbon Batteries

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Performance of Nano Carbon Batteries

Postby smcewan on Thu Apr 12, 2018 2:22 pm

Hello all,

I've seen lots of data about how well nano carbon batteries perform if they only receive a freshening charge 1-2 times a month and operate at 50%-80% SOC. How many more cycles will these batteries give if charged up every single day? Will the difference be significant or negligible?

Thank you in advance,
Scott
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Re: Performance of Nano Carbon Batteries

Postby raysun on Thu Apr 12, 2018 6:06 pm

Hey Scott,

I use these batteries, and it took a while to sort out the specs and claims. Here's what I have been told: If fully charged every day the 200NC will get about 1800 cycles. If operated between 80% - 50% SOC, (using 30% of the battery capacity), the 200NC will get about 2600 cycles. In other words, when fully charging the battery daily, it behaves like a normal lead-acid battery, like the 200RE.

Since I discharge my batteries around 40% on a daily basis, I miss their "sweet spot" window and charge them to 100%.
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Re: Performance of Nano Carbon Batteries

Postby smcewan on Thu Apr 12, 2018 6:23 pm

So, to make sure I understand correctly: I am better off not letting these batteries get fully charged every day. I am worse off if I do let them fully charge every day.
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Re: Performance of Nano Carbon Batteries

Postby raysun on Thu Apr 12, 2018 8:23 pm

If a goal is maximum cycle life, then it's my understanding that occurs for the NC200 in a partial state of charge between 50% - 80%. There was a brief overview of the chemistry behind this on Outback's battery webinar yesterday.
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Re: Performance of Nano Carbon Batteries

Postby Gwendoly Espe on Fri Apr 13, 2018 9:28 am

raysun wrote:
I've seen lots of data about how well nano carbon batteries perform if they only receive a freshening charge 1-2 times a month and operate at 50%-80% SOC. How many more cycles will these batteries give if charged up every single day? Will the


Yes! There has been two battery focused webinars these past two weeks and they just got posted on our YouTube Chanel: https://www.youtube.com/user/OutBackPowerTech

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Re: Performance of Nano Carbon Batteries

Postby mevenable on Tue Jun 26, 2018 5:51 pm

please give me a direct link to the webinar on the chemistry of the NC batteries that explains the 50-80% thing. That is one of the most obscure points in the manual and has been debated endlessly in online forums. I tried the link in one of the replies, but still could not find that topic

thanks
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Re: Performance of Nano Carbon Batteries

Postby smcewan on Mon Dec 03, 2018 8:03 pm

I was looking at this, and realized the datasheets for these batteries wouldn't make any sense if they were only charged to maximum 80% SoC and never back up to 100%. If that were the case what do the 10% and 20% DoD bars mean in these datasheets? Is that data observed or just extrapolated? If observed, what does it mean? That the batteries are kept continually at a 80% or 90% SoC and not charged back up to 100%? Would that even be a "cycle" or would that be considered a non-fully charged "shelf-life"?

I'd appreciate help interpreting these datasheets: http://www.outbackpower.com/downloads/documents/energy_storage/energycell_nanocarbon/energycellnc_specsheet.pdf
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