Well, Jerry, I guess I'm up to speed now, thanks... It's just that your
explanation here wasn't what I asked about. I was asking about your
words that "rotating them reduces the effect [of internal resistance to
charge and even discharge] and may in time help to improve the battery
life" - I had not heard this, and I also asked how you rotate strings -
the order of batteries within a string? Mixing batteries among strings?
Simply rotating the lead positive cell in each string?
So I ask again - is there an online resource you can suggest, so we can
learn more?
Thanks, Allan
On 11/21/2018 8:21 PM, jerrysgarage01 wrote:
Allan
I have been involved in off grid since the late 70's, l guess l have
picked up a thing or two. As batteries age most will require higher
voltage to reach the same specific gravity and will have a lower
voltage under a load. This is the result of resistance with in the
battery. This battery may still be good and just needs a good charge
to get it back to a more normal state.
The entire wire harness from where it leaves the point of charge has
it's own resistance, every connection, cable end, wire all of it has
resistance and measuring this is not as easy as you may think, you
need to put a preset load on the bank measure the complete circuit
voltage, now do the same under charge, measure each battery note
everything and once done with all the seperate banks you can see where
the higher resistance is. This is why making all the cables the same
length and same size, l have seen some cables soldered to reduce
resistance. This in a long round about reason is why fewer bigger
banks is better then more smaller batteries. I can continue but you
should be up to speed now
Jerry
-------- Original message --------
From: Sindelar Solar <al...@sindelarsolar.com>
Jerry,
You write "I'm sure you know this..." but I don't know it. I don't
think I have heard this before, as you have presented it.
How do you rotate strings? Where did you learn this? Is there an
online source that you can provide?
Thanks, Allan
On 11/20/2018 6:21 PM, jerrysgarage01 wrote:
Wrenches, Drake
You may consider contacting "Batcap" and bank if they have a best
practice for the battery configuration, this might be it but at least
a starting point. I have had multi string batteries that seamed to
like being rotated through the bank, sounds like alot of work and it
is but this will swap higher resistance strings for lower ones. I'm
sure you know this but each battery has internal resistance to charge
and even discharge so rotating them reduces the effect and may in
time help to improve the battery life.
Jerry
--
*Allan Sindelar*
al...@sindelarsolar.com <mailto:al...@sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*
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