Solar Lattice

Measurement

DC input voltage discharged

ID
meas:dc-input-voltage-discharged
IRI
https://solarlattice.org/kb/meas/dc-input-voltage-discharged
Status
active
Also known as
Rapid Shutdown successful

This signature means the voltage at the inverter DC inputs has been brought down after a rapid shutdown. The inverter logs it as event 9035, Rapid Shutdown successful, and the AC output voltage is discharged at the same time. It comes after event 9033, which says the inverter detected that a rapid shutdown was triggered. Either of two things starts the discharge: the AC side of the inverter is disconnected, or an external rapid shutdown initiator is activated. While this is happening, the PV inputs are shown as discharging. On models with a battery, the PV inputs are discharged and the battery is also switched off. Most manual versions say the AC side was disconnected when event 9033 was logged. One version says it was connected, so check the wording for your firmware and manual. Before working on the inverter, check that no voltage is present. Use a measuring device rated for the inverter's maximum DC and AC voltage, and a current clamp to confirm that no current is flowing.

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Signals

Monitoring channels where this signature appears, named by SunSpec model point.

PointUnitPattern
model_103.DCVVInverter DC input voltage collapses to a low safe level shortly after initiation
model_160.DCVVMPPT input voltages fall to a low level on all inputs at the same time

Referenced by

Data