On 2/19/2012 6:04 PM, Maverick Brown [Maverick Solar] wrote:
Other than some statements I have heard about battery reaching full
capacity after X cycles... Maybe that is a wives-tale as well.
Right.... Not cycling like that associated with the memory effect of
nicad batteries, but reaching full capacity after some
time in service is what I had heard from Jamie Surrette. Can't remember
exactly why but may have been from some plate forming.
boB
Otherwise, maybe I was not clear. By cycling, I mean daily (or
periodic) Absorbas I mentioned in the email, not loading/draining the
battery (other than the clear statement to test to see if the
system actually works as a backup systemevery once in a while).No real
deep draining necessary. For instance, after some months without
issue, one customer called in a panic because the electricity did go
off one night and they had no backup. Turns out, somehow they turned
off the "Inverter" function. Easy solution, press a few buttons, etc.
to turn on the inverter.
Maybe all I need is a Time function attached to Selling, like the
Charge function has on some brands. Who knows.
It is clear that FLAs have a self discharge and some percent of
capacity is obtained during Absorb, so a long term Float only might
reduce some of the batteries capacity.
Anyway, Outback does have the "Absorb before Sell" function when using
the FN-DC in the system. Not sure about the newer version of hardware.
The "Parameters Met" settings gave me fits until I figured it out.
Plus, the FN-DC is not free.
The XW has a function for Absorb before/during sell. I think it
requires a XW CC. We use every brand of CC appropriate for the site.
Also, the setup instructions are weird in my mind since it requires
the Grid Support Voltage to programmed to very high value. I wish they
would just have added the function "Enhanced Interactive Mode =
Enable", etc.
Ok, enough rambling...
Maverick
------------------------------------------------------------------------
*From:* [email protected]
[mailto:[email protected]] *On Behalf Of
*[email protected]
*Sent:* Saturday, February 18, 2012 3:37 PM
*To:* RE-wrenches
*Subject:* [RE-wrenches] cycling flooded batteries is not necessary
to reiterate wrenches:
two battery manufacturers (surrette & trojan) have both stated there
is NO NEED to cycle floating, flooded lead-antimony batteries. i have
heard this urban legend for some time and it is nice to finally have
it put to rest as an incorrect myth.
todd
On Saturday, February 18, 2012 7:04am, "Doug Wells"
<[email protected]> said:
> Maverick,
>
> "But you would think after 20 years, inverter manufacturers would
make some
> software similar to generator cycling to handle this cycling issue. "
>
> I believe that the XW Inverters have this ability in sell mode. There is
> traditional sell voltage. And then there is a setting that puts the
batteries
> through a traditional bulk cycle while still "selling" back any
excess energy.
> The next question would be, is this better for battery longevity.
Seems like a
> hybrid of the two would be ideal.
>
> Doug Wells
> The Solar Specialists
> Morrisville, VT 05661
> (p) 802-223-7014
> (c) 802-498-5856
> www.thesolarspecialists.com
>
> _________________________
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