Hello boB and Steve,
I haven't been able to make it to the site yet, but so far, no more
reports of spikes. I plan to try boB's suggestion of shutting off the
grid input while it is selling, to see what happens.
The spike did only last one second, so I don't think it is a chemical
whip effect. If the spike only lasted a fraction of a second,
wouldn't the Mate 3 still show the event lasting a second, since that
is its lowest level of granularity?
The array size is 2240 W and the Concorde battery bank is 305 AH at
48 V for a C/6.5 charge rate. The battery bank should have been
fully charged. If the grid went down and the Radian quit selling
during a heavy selling period, could that not cause a 1 second
voltage spike, or should the Classic catch it instantaneously?
Thanks,
Drake
At 11:49 PM 7/18/2017, [email protected] wrote:
The Classic can overshoot but not very much, normally.
I would try this...
Sell to grid while watching the battery voltage and then turn the
inverter breaker off
and see what the battery voltage does. If the battery voltage rises
to the mid 60V range
from a low sell voltage of around 52 or 53V, then something is really amiss.
If the system has been in service for some time, you might also
check the capacity of
the batteries. They should not easily allow 65-ish volts. I don't
think that the
FM's communication can respond to keep spikes from happening any better
than it could without communications. Data packets just don't come all that
often.
boB
On 7/18/2017 5:25 PM, Jerry Shafer wrote:
Wrenches
The Outback system with grid connection would be programmed for
grid connection all the way from the inverter to the Outback FM CC,
using a midnite CC this option may not be possible resulting to a
CC push if the grid disconnects resulting in a spike. the
disconnect might be from settings to tight or as it was said
utility spikes. You might thing that the battery bank should take
it up but internal resistance in the battery or to it may prevent
it. The other thing I would look at is connections, if there is any
resistance in a connection this could happen.
On Mon, Jul 17, 2017 at 2:36 AM, Drake
<<mailto:[email protected]>[email protected]>
wrote:
Hello Wrenches,
My client reported seeing an overvoltage error message on her Mate
3 on a Radian system. The Radian is selling to the grid and is
being fed by a Midnite Classic 200. It has shown two spikes so far,
the last one going to 67 volts and lasting 1 second. The batteries
are Concorde AGM, 305 AH.
Does this momentary spike seem like a problem or a warning of
problems to come?
Thanks,
Drake
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