Project size calculator
A successful project begins with calculation and estimation, so if you want to start your small power system of solar panels the watch the following plan
let s suppose you have 1 TV and 3 lamps in your home, in order to know how many panel and battery you will by follow this you should follow me step by step
Step 1: calculation of the daily energy requirement
Step 2 : Calculation of the number of panels necessary
First Method:
- the regional factor of sunshine
Each place has a factor of sunshine, we call the regional factor of sunshine (FR)
Ex :
in Algeria FR=5
- The amount of energy produces one panel per day (Ep)
EP = Power of panel *FR
Ex:
a Panel of 80 W: give =80*5=400 Wh/D
- The number of panels necessary (Np)
Np= DERf /Ep
Np=1176.5/400 =2.94
3 panels of (80 watts,13 V)
Second Method:
Np= DERf /Ep
Np=1176.5/400 =2.94
3 panels of (80 watts,13 V)
Second Method:
- The Total Power (Pt)
Pt=DERf /FR
=1176.5/5
Pt=235.3 W
Np=Pt/P1 So: Np=235.3/80=2.9 we get 3 Panels of 80 W
P1=Pt/NP So : P1=235.3/3 =78.43 W we get 3 Panels of 80 W
3-calculation the number of batteries necessary
- the necessary capacity for a row of batteries
- net capacity
C1 =DERf / Ui
Ui:(Tention of the installation ) depends on the power of all panels you need
{Ui=12V if :Pt<300 W
{Ui=24V if :300W< Pt<1500W
{Ui=48V if :Pt>1500 W
AN: Ui=12 V because Pt=235.3W<300W)
C1=1176.5/12
C1=98.04 Ah
- the total capacity of batteries (Ct)
Ct=C1+30% =C1*1.3
AN: Ct=98.04 *1.3=127.45 Ah
- Number of batteries necessary
- choice of battery
Battery 1: Cb1 =65 Ah
Ub1=12V
calcul the Nb
Nb=Ct/Cb1
AN: Nb=127.45/65
Nb=2 2 Batteries of 65Ah,12 V
for other types of batteries change only the calculus, the method is the same the same
so, in the end, we need for our power system :
- 3 Solar Panels (PV) of 80W,13 V
- 2 Batteries of 65 Ah,12V
- 1 Regulator
- 1 inverter 12VDC /220V AC
- Accessory (cables, disjunctures, elements of fixation)
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