Jay has a real strong point. If you are near low voltage low state of
charge. Two or 4 hrs from a 4kw array is only 8 to 16 kwh nowhere near 46
kwh. Given the recomended max charge rate is C/5 you would have to be
charging for days
On Fri, Apr 19, 2019, 10:20 PM John Blittersdorf <
Mac,
If there is a TriMetric or charge controllers, you can get min/max
voltages each day or since last reset. I have found that is very useful
info when large, short duration loads hit. ie well pump. I would find on
one of my 24 v systems that an 18 or 19 v min would indicate that the well
Hi Larry,
I am curious why you would use the 100Hr rate for this approximation and not
the 20 or 24Hr one, since that is the period in which Mac is reporting the
anomaly. Happy to learn the details!
Thanks,
Glenn
From: RE-wrenches On Behalf Of
Starlight Solar Power Systems
Sent:
Hi Mac
I don’t know if this is pertinent, but it could be the SOC /fndc getting out of
calibration.
I’ve seen this happen if % SOC charge termination is on ( default).
Kinda goes into a negative loop.
The other thought is that 2 hr absorb is pretty short for that size bank, but
maybe that
Mac,
Only removing 6kWh from 46kWh of storage should not be able to produce the
voltage sag to trigger AGS. That’s only about 13% at a 100Hr rate. Voltage
should be no where near that point. Have you verified actual voltage when the
AGS is triggered? Loose wiring or terminal corrosion can
Might want to confirm that the FNDC Relay is off and just the AGS relay is set
from the Mate menu.
Seems I went through this one time before and excellent Outback support quickly
surmised the issue for me.
Scot Arey
Solar CenTex
From: RE-wrenches On Behalf Of Mac
Lewis
Sent: Friday,
Good question. Voltage slowly drops in a fairly linear fashion through out
the night. If it is a sudden short duration load, it is short enough that
Optics can't pick it up, or it get's averaged out. When I've been on site,
I didn't observe any loads that caused concern.
On Fri, Apr 19, 2019
Using Optics, can you equate the voltage sag/ gen start command with a
particular load? Or is the voltage dropping quite evenly over the course
of the night? They could actually be degraded if there is no indication of
a sudden load/ voltage drop. A simple load test when on site can also help
Hello Wrenches,
We recently inherited an Outback system that I've been keeping an eye on
via Optics. Its a dual stack 3648 VFXR, with about 4kW of PV with a single
string of EnergyCell 1100RE battery bank (reported to be ~6 months old)
~.46 kWh at C20.
I have been observing how the system
Bill – A couple items:
1. The 3TL-US (along with all the STP TL-US line) has been discontinued,
and I believe this particular model has been completely sold out. Some
Distributors may have stock remaining or you may have already obtained the
unit. As Blake noted, if you use this
Does anyone have 4, REC 290 TP modules? Please contact me off the list
if you do.
Thank you,
Drake
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