Dc Connection (From Pv Array); Asymmetrical Loading - Delta RPI H3A Operation And Installation Manual

Wiring

5.3 DC Connection (from PV Array)

• When undertaking DC wiring, please ensure the correct polarities are
connected.
• When undertaking DC wiring please ensures that the DC isolator switch
on the PV array is OFF.
The maximum open circuit voltage of the PV Array must not exceed 600Vdc.
The maximum recommended input power to the inverter is:
Type of limit
Total input power
Per MPP tracker*
*with unbalanced input power
The device installed between the PV Array and inverter must meet the rating
of voltage higher than this device's maximum input voltage.

5.3.1 Asymmetrical Loading

The inverters operate using two separate MPP trackers that can handle both symmetrical
and asymmetrical loads to allow for optimum adjustment. This allows for the requirements
of complex PV system designs to be fulfilled. For example: east/west-facing roof
(symmetrical load) or a south facing roof such as a dormer (asymmetrical load).
MPP range with Max. power
Symmetrical load
Asymmetrical load
Max. ratio for asymmetrical load
WARNING !
CAUTION !
RPI H3A RPI H4A
3200W 4320W
3200W 3200W
NOTE
RPI H3A
160~500V
320~500V
100/0%;0/100%
20
RPI H5A
5280W
3500W
RPI H4A
180~500V
266~500V
80/20%;20/80%
RPI H5A
220~500V
291~500V
70/30%;30/70%