11. Initial Setup
23 www.sinetech.co.za
Grid-tie with backup (IV): Users are only allowed to set up peak time and off-peak
electricity demand.
Working logic during peak time:
PV energy supply priority:
1
st
Load, 2
nd
Battery and 3
rd
Grid
PV will provide power to the load first. If PV power is sufficient, it will charge battery
next. If there is remaining PV power left, it will feed-in to the grid. Feed-in to the grid
is default disabled.
Battery charging source:
PV only
Only if PV power fully supports the load, will the remaining PV power be allowed to
charge battery during peak time.
Load supply source:
1
st
PV, 2
nd
Battery, 3
rd
Grid
PV will provide power to the load first. If PV power is insufficient, battery power will
back up the load. If battery power is not available, grid will provide the load. When PV
power is not available, battery power will supply the load first. If battery power is
running out, grid will back up the load.
