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031-331-B1-001 Rev. A (11/2015)
System Shutdown,
Morningstar TriStar MPPT-30 Charge Controller
1. Open the load output circuit breaker (the Green LED on the LVD will remain on).
2. Open the PV module circuit breaker.
3. Open the DC bus master circuit breaker (the Green LED on the LVD will turn off at this time).
4. Open any connected battery breakers.
5. Measure across the Load positive (+) and Load negative (–) on the charge controller. Verify a reading of 0 Vdc, indicating
the system is offline.
A
B
C
D
Illustration of Morningstar TriStar MPPT-30 Charge Controller courtesy of Morningstar Corp.
A
PV module breaker
B
DC bus breaker
C
Low voltage disconnect (LVD)
D
Load output breaker
WARNING: Electrical Hazard
Prior to beginning the shutdown procedure, cover the PV modules with opaque material to prevent the conversion of light energy
into DC power.
CAUTION: Hazard to Equipment
Opening the battery breakers before opening the PV or load breaker will damage the charge controller.
CAUTION: Hazard to Equipment
The master battery breaker must be opened during periods of no solar input that extend beyond the rated 3 day blackout
autonomy e.g. solar panel service, prolonged snow cover, debris build up on panel. Failure to either recharge the batteries or open
the master battery breaker during an extended outage may result in permanent damage to the batteries.
