APPENDIX B
HOW TO DETERMINE THE OUTPUT SOURCE PRIORITY SETTING AND
CHARGER SOURCE PRIORITY SETTING?
Please read this document carefully if you intend to manually set the priority setting
of the product. Improper setting might compromise the function and performance of
the product.
The product is designed to accept both utility and solar (PV) power as input source,
and it also provides a function allowing the user to determine the priority between
utility and solar input power. The priority is to be set via LCD and control buttons on
the front panel (please refer to user manual for more details). This document
explains how the product’s behavior will be at each setting and what should be
considered while determine the priority.
A.
Output source priority setting
1.
Setting Utility as output source priority
1.1 When utility is normal
The loads connected to the product are supplied by utility power only, even when
solar power presents.
1.2 When utility is down
As soon as the utility is down, the inverter enters into “Backup Mode” and checks
both solar power and battery’s status. If solar power is strong enough, it will supply
the loads. If solar power becomes weak, the loads will then be supplied by battery
until it’s too low. The longer the solar power lasts, the less consumption from the
battery and hence the longer backup time.
Advantages
Disadvantages/Risk
•
Better chance to keep the battery fully-charged so that the
backup function won’t be compromised when the utility is
down.
•
Good for batteries life as batteries are less chance to work on
discharging mode.
•
The solar power cannot be
fully utilized by supporting
the loads, especially when
battery if fully charged.
2.
Setting Solar as Priority
2.1 When utility is normal
As long as solar power is strong enough to support the, utility power will not be
consumed even though it’s available. If solar power is not enough, battery will firstly
come up to support the loads, and after battery is low or the setting point in program
5, utility will then take over to support the loads.
If solar is absent, utility will then take over
to support the load too.
