Yes what Jay said - need a block diagram with available power flows on
this one. If you've been working with Sol-Ark you probably covered the
basics but just for the rest of us to be assured:
I assume:
1) you are using the Radian only as an AC Grid-Tie inverter - no
batteries on it?
2) that you are aware that the AC Coupled wattage plus the DC wattage on
the Sol-Ark's MPPTs must be within the total allowed for solar generation
3) that you have the AC Coupled output of the Radian connected to the
GEN breaker of the Sol-Ark
4) that you have the software set for the GEN breaker to be AC Coupled
and have checked all other software items with Sol-Ark needed for AC
coupling
just as a starting base for us to understand what may be happening.
And some of the techs at Sol-Ark are in training - have you talked to
the tech lead, Dustin Douglas? He's the official Sol-Ark rep on this
list but I just saw him at InterSolar and he said he has been just too
busy to chime in here much. I'm scheduled to speak with him soon - I'll
see if he can find the time if he hasn't already talked to you.
Best,
Jeff
Vince McClellan <mailto:[email protected]>
January 19, 2022 at 3:15 PM
Is anyone on the list familiar with AC coupling Sol-Ark inverters?
We haven't been able to AC couple an existing Outback Radian system to
a new system that we built with 3, Sol-Ark 12K inverters and 3, Blue
Ion batteries. Each time we have tested the system the Sol-Ark
inverters accept the power from the Radian inverter until we turn on
the DC power from the new solar array to the Sol-Ark inverters. As
soon as there is significant DC power coming from the solar array the
Sol-Ark inverters freq-watt turns on for a brief second and
disconnects the Radian inverter even when the Blue Ion batteries are
below the programmed state of charge threshold. If we don't turn on
the DC power from the new solar array the Radian will connect and stay
connected.
We have been working with Sol-Ark for several months now to get this
system to accept the incoming power from the Radian without freq-watt
kicking in on the Sol-Ark inverters and disconnecting the Radian
inverter. Sol-Ark has sent two software revisions to the Sol-Ark
inverters and we are still experiencing the same problem.
Can anyone think of what we might be missing and where to direct our
troubleshooting efforts next?
Thanks,
Vince McClellan
Energy Design
NABCEP PV Installation Professional
p. (541) 485-8122 <tel:%28541%29%20485-8122> f. (541) 338-8202
<tel:%28541%29%20338-8202>
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