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User Manual of Solar Intelligent Energy System (SIES)
TBB Power Confidential Page
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Table 3 Energy Storage mode: Grid is not available
Work Mode
Priorities of Energy Source
Description
Energy Storage
(A)
Solar > Battery > Generator
1. During daytime, Solar Energy has priority to
power the loads and at the same time charge
battery.
2. If Solar Energy is not sufficient, battery will be
discharged to power the loads.
3. When battery is discharged to low voltage level,
generator will be automatically started to power
the loads and charge the battery.
2.1.2.2 Scenario B. Grid is available but not the preferred energy source
This work mode can also be useful for areas where have grid but the people want to be independent
from grid. Energy from solar will be the prioritized source for powering the loads and meanwhile
charging the battery. When it is sunset, battery will be discharged to power the loads. Only if battery
is deeply discharged, grid will be introduced to power the loads. Furthermore, the system can be
configured whether the power from gird will be used for charging battery or completely not.
Table 4 Energy Storage mode: Grid is available but not the preferred energy source
Work Mode
Priorities of Energy
Source
Description
Energy Storage
(B)
Solar > Battery > Grid
1. During daytime, Solar Energy has priority to power the
loads and at the same time charge battery.
2. If Solar Energy is not sufficient, battery will be
discharged to power the loads.
3. When battery is discharged to low voltage level, grid
will be introduced to power the loads and charge the
battery.
2.1.3 Power Backup mode
This work mode is aiming at those area suffering occasional power blackout. Grid is the main power
source, and PV and grid will charge the battery together. Battery is to be discharged to power the
loads only if there is power blackout.
Table 5 Power Backup mode
Work Mode
Priorities of Energy
Source
Description
Power Backup
Grid > Battery
1. Grid will be major power source for powering loads. PV
and grid charge the battery together.
2. Upon power blackout, battery will be discharged to power
the loads.