Solar sizing
STAND ALONE PV SYSTEM
LOAD DETAILS
Sr.
No
Item
Nos.
1
DC Mini Split AC
1
Power
(W)
Total Power
(P) (W)
Per Day
Usage
(h/d)
Total Energy
Consumption
per day
(Wh/d)
1000
1000
6
6000
6.000
6000
6.000
1000
Total
(kWh/d)
CALCULATION OF PV ARRAY
5500
(Whm-2d1
)
Data sheet-Site
PV module efficiency 'ηPV'
0.165
(%)
Data sheet-PV
Battery Efficiency 'ηbat' (%)
0.95
(%)
Data sheet-Battery
Inverter Efficiency 'ηinv' (%)
0.95
(%)
Data sheet-Inverter
Standard test condition 'Tstc'
25
(°C)
(°C)
Data sheet-PV
Data sheet-PV
(47±3)
%/K
(-0.47%/K)
Average available irradiation 'Have'
Normal operating cell temperature 'Tnoct'
45
Temperature coefficient of Pmax'y'
0.0047
Temperature correction factor 'Tcf'
91%
Area of PV Modules required
8.09
(m2)
Peak power (Wp) of PV system required (W)
Factor
1334
W
Peak power (kWp) required by PV modules (kW)
Fill Factor (Parameter X)
Fill Factor Range (Parameter Y)
-
Peak power of PV modules (Wpm)
Open Circuit Voltage per PV module at STC 'Voc' (V)
-
W
X within range of Y
Data sheet-PV
V
Data sheet-PV
Maximum Power Voltage per module at STC 'Vmpp' (V)
42.50
V
Data sheet-PV
Short Circuit Current at STC (Isc)
8.52
A
Data sheet-PV
Maximum Power Current at STC (Impp)
8.00
A
Data sheet-PV
Actual No. of Modules required
Rounded No. of Modules
3.92
4.00
Max. Voltage from PV array at Voc at STC (Varr-oc-STC)
205
V
Max. Voltage from PV array at Vmpp at STC(Varr-mpp-STC)
170
V
Loss factor
1.25
1.33
kW
INVERTER SIZING
Inverter Sizing-Theoretical (kW)
Surge factor
Inverter Sizing-calculated (25% Increase+surge factor)
-
W
W
W
Inverter Sizing-calculated (Round) (Parameter H)
1.3
kW
BATTERY SIZING
Nominal Voltage of Battery (V)
Ah of one 12V battery (Ah)
Depth of discharge (Dd)
Autonomy (No. of days)
12
V
200
Ah
0.6
1
Size of battery bank required
877
Ah
No. of batteries
4.39
No. of batteries
Battery voltage required for inverter
No of batteries required in series
4
12
1
Number of srings for battery bank (parallel circuit)Actual
4
Number of srings for battery bank (parallel circuit)Practical
4
Total No. of batteries matched
4
V
No of modules = 4
Power of PV module = 340Wp
Size of inverter (theoretical) = 1250W
Recommended Inverter size = 1300W
Battery AH = 200
No. of Batteries = 4
•
•
It is recommended to install at least 1250W inverter and output 208-240V
No. of batteries depend upon the backup period if you want to reduce backup period, no. of
batteries can be reduced.