Wrenches,
Historically the older sma's would clip amps, l have programmed many at the
request of the utility, l had one out of the box clipping as 10 watts
rather than the 10 kW. it was nameplated as. Anyway its all in the voltage
not the amps to worry about. Clipping may increase heat so keep them
How old r the modules? 1.5 + is not a problem, the fan will come on but
the STC is not the NOC. w/ a new modules the PTC verses STC figures is~ 20-
30 less watts. These days we all seem to b replacing older modules that
have lost some umph. We would always push the SBs 1.5 as a standard
practice.
Hi BillGiven that the LBCO would happen probably without solar or limited anyway the fm-80 is going to read battery volt because no current. Sorry I confused the issue previously Just calibrate the fm-80 with no solar production and you should be fine. JayOn Jan 7, 2025, at 4:26 PM, Bill Battagin v
Another quandary. The old SMA SBX000US transformer inverters would cost
an arm and a leg to ship off (and returned from) somewhere to be fixed,
if even fixable at a reasonable rate. I found one online source that
wanted $4K for one of these old timers, shipping not included. I was
called to t
Looks like a lot of unknowns. Another head-spinning idea.One method
to my wanting to use the FM80 might be to set a LBCO voltage too high
just to simulate a shutdown, have a fluke on the battery bus and another
on the aux output, load the battery to drop battery voltage. When to
aux activ
Hi Mac,
yeah its confusing.
As far as I know, the fndc only controls the FNDC functions. its own internal
AUX, and AGS % which you can control through the inverter relay or the FNDC
relay.
All the other AUX relay functions are controlled by the device the AUX is in.
But I could be mista
Hi Jay,
Adding some nuance here, and I could be mistaken about all of the functions
that get taken over by the FNDC voltage.
When you calibrate the FNDC, it "shows" the voltage on the Mate as the FNDC
voltage if there is an FNDC in the system. I also believe that it
defaults to the FNDC voltage
Hi MacI’mGoing to disagree. The FNDC only provides its voltage it doesn’t populate to the other devices. You still have to set the inverter and CC separately, a poor design. Depends on which mate you’ve got where the fndc voltage is located. One reason I don’t like the CC voltage for aux control is
Hi Bill,
Do you have a flexnet in the system?
I assume that it wouldn't matter if the FM80 is calibrated but you will
want the flexnet perfectly calibrated if you are using Lithium. It's a
very annoying but worthwhile process. Don't drop the little nuts.
Here is a paper on the procedure:
http
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