Overload Behavior - Generac Power Systems PWRcell XVT076A03 Installation And Owner's Manual

Troubleshooting

Overload Behavior

Island Overload Event
Overload on Voltage
(vulnerable when battery has
low SoC)
Overload on Current
(most vulnerable to this
condition when system does
not have an external ATS)
56
Table 9-2. Overload Behavior
Cause
Motor load has demanded
additional current for starting
causing voltage to drop
below allowable threshold.
Cumulatively, there is too
much load on the inverter
system.
Behavior
– If inverter output voltage
drops below 114 V, inverter
will attempt to shed any
loads connected to SMMs
by dropping frequency.
– If the inverter drops below
96 V for more than 6 sec
(loads will brown out during
this time), the system will
blackout all loads.
– If inverter experiences
current greater than 35
amps L-N, the inverter will
prevent transfer back to the
grid and system will stay
islanded.
– If inverter experiences
current greater than 35
amps for more than 15
seconds it will blackout and
attempt to power loads at an
increasing interval between
attempts, starting at 20 sec
up to a maximum of one
hour.
Installation and Owner's Manual for Generac PWRCell Inverter
Solution
– Turn OFF motor loads
– Reduce house loads as
necessary
– Reduce house load