RE Display System 1 at
RISE Outdoor Test Area |
| Inverter Sizing |
Parameter |
Label |
Notes |
| Inverter
efficiency |
90 % |
A1 |
From
Initial design Specification |
| System
Voltage |
24 Vdc |
A2 |
From
Initial design Specification |
| Inverter
voltage |
240Vac |
A3 |
From
Initial design Specification |
| |
|
|
|
| Total Power Required |
2200W |
A4 |
Selected
based on Maximum Demand |
| Total Energy
Used |
2280Wh |
A5 |
from Energy
Calculation |
|
Maximum Demand |
2508 VA |
A6 |
from Energy
Calculation |
|
Surge Demand |
3136 VA |
A7 |
from Energy
Calculation |
|
Current Draw at Maximum
Demand |
104 Amp |
A8 |
3.4.1(a) recommends a limit of no greater than 120
Amp |
|
System Voltage
suitability |
Yes |
|
|
| . |
|
|
|
| Inverter
Inefficiency with load |
2533Wh |
A9 |
=A5/A1 |
| Total A-h per
day |
106Ah |
A10 |
=A9/A2 |
| Over supply coefficient fo RE only
systems |
1.00 |
A11 |
3.4.2.5 Systems without a
generating set |
| Selected inverter
Specifications |
Selectronics SA31 |
A12 |
|
|
Inverter peak
efficiency (500W) |
93% |
|
|
|
Continuous @ 25° |
2200W |
|
|
|
30 minute @ 25° |
3500W |
|
|
|
5 minute @ 25° |
4300W |
|
|
|
1 minute @ 25° |
5300W |
|
|
|
Surge Rating @
25° |
6500W |
|
|
| |
|
|
|
| Battery sizing |
|
|
|
| Number of days
of autonomy |
4 Days |
B1 |
From
Initial design Specification |
| Max depth of
discharge |
60% |
B2 |
From
Initial design Specification |
| Battery
Capacity |
704Ah |
B3 |
=A10*A11*B1/B2 |
| Lowest 24 hr
Temperature |
25°C |
B4 |
Typical
ambient condition |
| Temperature
Correction Factor |
1 |
B5 |
From
battery specifications |
| Adjusted
Battery Capacity |
704Ah |
B6 |
=B3/B5 |
| Selected
battery |
Enersun SSR700-6 |
B7 |
Selected |
| Selected
Battery Voltage |
6 V |
|
From
battery specifications |
| Selected
battery discharge rate |
C100 |
B8 |
From
battery specifications |
| A-hr capacity
of selected battery |
700Ah |
B9 |
From
battery specifications |
| Number of
batteries in parrallel |
1 |
B10 |
=B6/B9
(Rounded up) |
| Number of
batteries in series |
4 |
B11 |
=A3/12 |
| Check:
Capacity of selected battery at 100h rate |
700 |
B12 |
From
battery specifications |
| Capacity of
battery bank at 100hr rate |
700Ah |
B13 |
=B12*B10 |
| Max. Daily
depth of discharge |
15% |
B14 |
=A10/B13 |
| Suitability of
batteries? |
YES |
B15 |
|
| Estimated cycle life @ Max. Daily
depth of discharge |
approx. 3000 cycles |
|
From battery specifications |
| Total number
of batteries |
4 |
|
=B10*B11 |
| |
|
|
|
| Photovoltaic Array sizing |
|
|
|
| Design
tilt |
40° |
C1 |
From
Initial design Specification |
| Design
Month |
Yearly Average |
C2 |
From
Initial design Specification |
| Daytime Average Ambient Temperature
for Period |
20° |
T1 |
Selected from site data
applicable when using MPPT controllers AS4509.2 clause
3.4.3.6 |
| Average Daily cell operating
temperature |
45° |
T2 |
T2=T1 + 25 AS4509.2 clause
3.4.3.6 |
| Total Energy
demand per day |
106Ah |
C3 |
=A10*A11 |
| Battery
efficiency |
85% |
C4 |
From
battery specifications |
| Array Output
required per day |
124Ah |
C5 |
=(C3/C4) |
| Peak sun hours
at design tilt for design month |
5.95 hrs |
C6 |
From
Initial design Specification (AUST Solar Rad data) |
| Selected
module |
BP Solar, BP585 Saturn Modules |
|
|
| Power at maximum |
85W |
C7 |
|
| Selected
module I at 14V at NOCT |
5.0 Amp |
C8 |
From panel
specification sheet |
| Selected module Power at 14V at NOCT |
70W |
|
=C18*14 |
| Selected
module nominal operating voltage |
12 Vdc |
C9 |
From panel
specification sheet |
| Derating Factor for manufacturing
tolerences |
93% |
fm |
From module specification sheet (note
BP Solar minimum power tolerance is with minus 5 W from nominal power )
AS4509.2 clause 3.4.3.5 |
| Derating Factor for soiling
tolerances |
100% |
fs |
|
| Derated
Current |
4.6 Amp |
C10 |
=fm*fs*C8 (note spec for module
is no more than -5W from nominal rating) AS4509.2 clause
3.4.3.7(1) |
| Derated Power of Module |
65W |
. |
AS4509.2
clause 3.4.3.7(2) |
| Number of
modules in series |
2.0 |
C11 |
=A2/C9 |
| Output per
module |
27.6Ah |
C12 |
=C10*C6 |
| Number of
strings of modules in parallel |
4.0 |
C13 |
=C5/C12 |
| Number of
Panels |
8 |
C14 |
=C11*C13 |
| Total derated
Output |
520W |
C15 |
=C14*C10*14 |
| Total Rated
Peak Output |
680W |
C16 |
=C7*C14 |
| |
|
|
|
| Note:
Hybrid system with diesel generator backup case, Average Solar radiation
data |
