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IMPORTANT:
Users often wonder why it is that when the sun is shining, the inverter is still using grid power. This is
probably because the solar has been diverted to charge the batteries first. Therefore, it will initially charge the
batteries only, and then when the batteries are fully charged it will start using the solar power to power the
load.
3. The inverter is then connected to the grid, load, and auxiliary:
The example shown in Figure 11 is showing the inverter running in a UPS take mode. The inverter is
drawing power from the grid to charge the batteries and also supply the load. In the case of a power failure,
then the inverter will reverse and supply the load.
These outputs 'AUX', 'LOAD' (UPS), and 'GRID' are all controlled via a number of relays. Depending on
the control, the setting will depend on what the inverter will do with the power. If you can understand this part
of the inverter, you will totally understand how it works.
Figure 10 - Prioritise load or batteries.
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