I was thinking of a Blue Sky or a Morning Star replacement.
The Full River AGM L-16 batteries recommend a
29.4 absorption, very high for a maintenance free
battery. I've triple checked this one.
At 09:30 AM 5/15/2015, you wrote:
HI Drake,
Iv'e never seen this happen. Â
But have you considered a small morningstar or similar?
A question, you list 29.4v, that seems high?
jay
On Thu, May 14, 2015 at 5:12 PM, Drake
<<mailto:[email protected]>[email protected]>
wrote:
I have a Xantrex C-40 that won't keep its
settings. It is important that it does because
it is for a maintainer array (80 W) on an AGM
battery bank, on an AC coupled backup system.
Not only could high voltage damage the
batteries, but when the voltage goes over 30
Volts, the AUX relay opens and the grid tie inverter is isolated from the grid.
After numerous sessions of reprogramming,
Xantrex tech support sent me a new unit. The
problem persisted as before. A new temperature
sensor helped, but the settings still drift. It
seems that rebooting the charge controller helps
for a day or so, but then it drifts again.
The potentiometer settings are way below the
calculated setting for 29.4 V, but it still
peaks in the high 30s. I check the temperature
compensated voltages on the Outback Mate, and
the temp compensated voltage runs high.
In a related side issue, the AUX relay of the FX
inverters is not based on temperature
compensated voltage, which makes setting AC
coupling charge set points more problematic.
Has anyone experienced a C-40 CC that drifts in
its settings. What would be a good (inexpensive)
charge controller to accurately control 80 W of PV?
Thanks,
Drake
--
Jay Peltz
Peltz Power
<mailto:[email protected]>[email protected]
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