•
Total V
mp
of the string shall be within the operating voltage range of solar
battery charger (35~70V for 3000VA model and 70~120V for 5000VA model
are recommended).
Model
PV Operating voltage range
PV Optimize working voltage range
3000VA
30~80Vdc
35~70Vdc
5000VA
60~150Vdc
70~120Vdc
Example 1 - How to connect
3000VA
model to PV panels with the following
parameters?
•
P
max
: 250W
•
V
oc
: 36.6V
•
I
sc
: 8.75A
•
V
mp
: 30.96V
•
I
mp
: 8.07A
(1)
The max. PV input power for 3000VA model is 2000W,
2000W / 250W = 8
⇒
min. 8 PV panels shall be connected.
(2)
Best Operating Voltage Range is 35~70V,
70V/30.96V = 2.26
⇒
max. number of PV panel in series is 2.
(3)
Taking (1)~(2) into consideration, the optimized configuration is 2 PV panels
in series as a string and 4 strings in parallel, as shown below.
(4)
Check again the V
oc
and I
sc
of PV string,
V
oc
of string is 73.2V < 80V (Max. PV Input Voltage)
⇒
OK
I
sc
of string is 4 x 8.75A = 35A < 50A (Max. PV Input Current)
⇒
OK
