SKE PL20 1.5KW, Руководство пользователя

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APPENDIX A
How to Select and Configure PV Panels
The following parameters can be found in each PV panel’s specification:

P
max
: Max output power (W)

V
oc
: open-circuit voltage (V)

I
sc
: short-circuit current (A)

V
mp
: max power voltage (V)

I
mp
: max power current (A)
PV panels can be connected in series or parallel in order to obtain the desired output voltage and current
which meets the inverter’s allowed range.
When connecting PV panels in series, the max voltage and current of the string is
V
string
= V
1
+V
2
+V
3
+V
4
…
I
string
= I
1
=I
2
=I
3
=I
4
When connecting the above PV string in parallel, the max voltage and current of the total string is
V
total
= V
string1
=V
string2
=V
string3
=V
string4
…
I
total
= I
string1
+I
string2
+I
string3
+I
string4
In either case, the total output power is P
total
= P
panel
X Number of PV panel
The guideline to select and configure PV string is

P
total
shall be equal or slightly larger than the max. capacity of solar battery charger (900W for 3000VA
model and 2600W for 5000VA model). Surplus capacity of PV string does not help the solar charger’s
capacity and only result in higher installation cost.

Total V
mp
of the string shall be within the operating voltage range of solar battery charger (60~72V for
3000VA model and 120~144V for 5000VA model are recommended).

Total I
mp
of the string shall be less than the max. input charging current of the solar battery charger (20A
for 3000VA and 30A for 5000VA model)

Total V
oc
of the string shall be less than the max. PV input voltage of the solar battery charger (75V for
3000VA and 150V for 5000VA model).

Total I
sc
of the string shall be less than the max. PV input current of the solar battery charger (20A for
3000VA and 35A for 5000VA model).
Example 1 - How to connect 3000VA model to PV panels with the following parameters?

P
max
: 260W

V
oc
: 37.7V

I
sc
: 8.89A

V
mp
: 30.9V

I
mp
: 8.42A
(1) The max. PV input power for 3000VA model is 900W,
900W / 260W = 3.46

min. 4 PV panels shall be connected.
(2) Best Operating Voltage Range is 60~72V,