[RE-wrenches] Outback settings adjustment so batteries consume less of PV output

[Jerry Shafer]

Wrenches
So what l got from the question is why when my batteries are at 100% isn't
everything just passing through. Well, your batteries may be the issue, l
stopped using AGM batteries because of what l called spill over, the
batteries are never full and are leaking out as they are getting full. This
can just be loss because of the chemical reaction and the electrons, even
waist heat. AGM might have a RTE of 82% (round trip efficiency) so some
battery storage energy is lost to the cosmos. Lithium ion phosphate can
have a RTE of 98%, lead acid 75% Edison batterys maybe 60%. So what l am
getting at is different batteries have different losses internally, AGM's
are cheaper then some so you pick your efficiencies and losses, a solution
may be to fatten up the array to compensate for the storage losses. I am
sure someone may have an alternate solution
Jerry
NABCEP PV Inspector

On Fri, Mar 19, 2021, 9:49 AM Christopher Warfel <
cwarfel at entech-engineering.com> wrote:

> I have not been able to find a way to set my customers battery charging
> parameters so that the AGM batteries do not consume less of the pv output
> to maintain charge.  Here is an Optics view of the situation with a small
> image embedded. (If you can answer, please remove image per Mr. Welch's
> request.
>
> I have the absorb voltage at 54.3 for one hour, the float voltageat 54,
> the equalize at 56 (disabled for this battery type).
>
> It seems like this is a lot of energy being used by the batteries, but I
> am hoping that some one with more experience in these settings can weigh in
> on any changes I should make, or if this is just how it is.  Thank you,
> Chris
>
>
>
>
>
> --
>                                          Christopher Warfel
>                      ENTECH Engineering, Inc.
> PO Box 871, Block Island, RI 02807
>                                                             401-466-8978
> <http://entech-engineering.com>
>
>
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