piclist 2017\09\05\033401a >
Thread: Precautions for long run 400 VDC cabling?
www.piclist.com/techref/index.htm?key=precautions+long
face picon face BY : RussellMc email (remove spam text)


On 5 September 2017 at 14:01, James Cameron <spam_OUTquozlTakeThisOuTspamlaptop.org> wrote:


> Some specifications have been filled in, and a quotation received from
> my designer.  I'm pleased with it.
>

Sounds very nice.
More questions will happen, but a few to start.

- I note you are proposing "true" Lithium Ion cells as opposed to the
LiFePO4 that you mentioned previously.

Why this choice? (Cost/lifetime/capacity/ planned use, ...)
What is the cycle life at what design DOD% and what Vmax do they use on the
cells to get rated lifetimes.
(Cell spec says 3.0V-4.2V full range which is = usual).
Other related?

- How are the PV panel cables fastened to the system?   [[Say what?  :-) ]]


*- ​Comment only: *

I note you correctly quote Isc and Voc
So combined voltages and current you quote are Vmax with no load and I with
system shorted at panels

Very impressive 18.3% panel efficiency. Nicely up on what was typical even
a few years back.
(With 18.6% from very top offering).


       Russell
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In reply to: <20170905020100.GA7430@us.netrek.org>
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Subject (change) Precautions for long run 400 VDC cabling?

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