I had done this a few times in the distant past, and also had done
it in recent years on my own previous battery bank (four strings of
S-530s - yes, I know; it was in anticipation of future plans to
upgrade to 48V, and two strings wouldn't have been enough).
It work
Good thread. Thanks. In my experience, it all boils down to the customer. I've seen one temp. set up with like 12 strings (for a concert). but they were recharged and sold individually within a few weeks.. I've also seen a single string (Teledyne aircraft batteries) fail in less than a year.. they
I recently purchased one and it has been useful. It can also be used to
find poorly insulated buildings, air leaks etc. I have been told that in
some states, fire departments will make their thermal imaging cameras
available to qualified people for conducting these types of surveys.
Chris
On 6
On 6/1/2011 10:43 AM, Michael Welch wrote:
Every now and then I see reference on this list to the need for thermal
detection. Here is an interesting, inexpensive piece of equipment that could be
used for finding hot (loose or corroded) connections, hot batteries, hot PV
cells in modules, and e
On 6/1/2011 8:41 AM, Larry Crutcher, Starlight Solar Power Systems wrote:
Hi boB,
We know that current will flow through the lowest resistive path. In a
perfect world, the resistance from end to end of a battery string will
be identical. Real world conditions show that one or more cells have a
Hi Michael,
With all due respect, do the reference "idiot lights" do that much for you?
I have always thought a thermal camera/viewer/FLIR/etc. would be great but
so would a used car. My digital IR thermometer at several orders of
magnitude difference in price has served me well, if tediously, to
Every now and then I see reference on this list to the need for thermal
detection. Here is an interesting, inexpensive piece of equipment that could be
used for finding hot (loose or corroded) connections, hot batteries, hot PV
cells in modules, and even poorly insulated spots, its original inte
Hi boB,
We know that current will flow through the lowest resistive path. In a perfect
world, the resistance from end to end of a battery string will be identical.
Real world conditions show that one or more cells have a slightly higher
internal resistance. Add to that the imperfect terminal cr
Does it make any difference to do as boB recently suggested and inter-connect
the strings? So in other words, if you have two parallel strings, what happens
if you parallel each battery in one string with the battery in the other
string? Has anyone tried this? It might help insure more balance
If one cell gets a higher internal loss than the others is hogs the charging
current and will over charge its string partners. It is a problem of the
temperature of all cells in all parallel strings having the same thermal
environment, so they all have the same voltage. (the case of one of 4 p
Hi boB,
I would say maintenance is a large issue - especially when dealing with L-16's
or the like, as the number of cells & connections gets large, i.e. 1000-1200AH
@ 48VDC is three (3) strings, 24 batteries and 72 cells. Will a client water
24 cells...maybe - 72??
However, from Tech Supp
On 5/31/2011 11:25 PM, Tom Elliot wrote:
Bob,
I totally understand the concern about multiple strings *if the
strings are connected across the battery bank* as had always been the
tradition in off-grid installations. My own experience with such a
bank in my system showed why when I had a sin
12 matches
Mail list logo
