35
36
Load supply source:
When PV power is available:
1. 1st PV, 2nd Battery, 3rd Grid
PV power will provide power to the load first. If it’s not sufficient, battery power will
provide power to the load. When battery power is running out or not available, grid
will back up the load.
2. 1st PV, 2nd Grid, 3rd Battery
PV power will provide power to the load first. If it’s not sufficient, grid will provide
power to the load. If grid is not available at the same time, battery power will back
up.
When PV power is not available:
1.
1st Grid, 2nd Battery: Grid will provide power to the load at first. If grid is not
available, battery power will provide power backup.
2.
1st Battery, 2nd Grid: Battery power will provide power to the load at first. If
battery power is running out, grid will back up the load.
NOTE: This option will become ineffective during AC charging time and the priority
will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause
battery damage.
·
Grid-tie with backup (IV): Users are only allowed to set up peak time and off-peak
electricity demand.
Working logic under peak time:
PV energy supply priority: 1st Load, 2nd Battery and 3rd Grid
PV power 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 after PV power fully supports the load, the remaining PV power is allowed to
charge battery during peak time.
Load supply source: 1st PV, 2nd Battery, 3rd Grid
PV power will provide power to the load first. If PV power is not sufficient, 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.
Working logic under off-peak time:
PV energy supply priority: 1st Battery, 2nd Load and 3rd Grid
PV power will charge battery first. If PV power is sufficient, it will provide power to
the loads. The remaining PV power will feed to the grid.
NOTE: The max. feed-in grid power setting is available in parameter setting. Please
refer to software manual.
Battery charging source:
PV power will charge battery first during off-peak time. If it’s not sufficient, grid will
charge battery.
Load supply source: 1st PV, 2nd Grid, 3rd Battery
When battery is fully charged, remaining PV power will provide power to the load
first. If PV power is not sufficient, grid will back up the load. If grid power is not
available, battery power will provide power to the load.
PV and grid charge battery
Figure 14.6
