UTLB
MECA 5A IEE
SOLAR POWER CALCULATION
To obtain the photovoltaic power the following
calculation is applied:
SOLAR POWER CALCULATION
Photovoltaic energy resulting in AC = Installed photovoltaic power
(CC panels, STC) x Solar radiation (value of the database, kW / m² day)
x percent loss factor (*)
SOLAR POWER CALCULATION
Application example of the online
photovoltaic calculator
SOLAR POWER CALCULATION
The example is given for an
installation located in Queretaro,,
Qro, Mexico.
SOLAR POWER CALCULATION
To obtain the photovoltaic power the following
calculation is applied:
Photovoltaic energy resulting in AC =
Installed photovoltaic power (CC panels, STC)
x Solar radiation (value of the database, kW /
m² day) x percent loss factor (*)
SOLAR POWER CALCULATION
Installation conditions
Type of Photovoltaic Generator: Crystal
Silicon.
Isolated installation of any building, good
natural ventilation.
Inclination equal to latitude, 42º.
Fixed azimuth, ie photovoltaic panel facing
South without East-West deviation.
SOLAR POWER CALCULATION
Type of losses
SOLAR POWER CALCULATION
1.-Estimated losses due to
temperature and radiation: 9%
Photovoltaic efficiency is affected
by the temperature of the module,
in general efficiency decreases
with increasing temperature.
SOLAR POWER CALCULATION
2.-Estimated losses because not all
solar radiation reaches the sensitive
material of the panel and produces
electricity: 2.5%
SOLAR POWER CALCULATION
3.-Losses inside the electronic stage of
conversion to alternating current,
as are the losses caused by diodes, regulators
and inverters.
Plus the losses in the wiring necessary to reach
the precise place where you will consume the
electricity: 12%
SOLAR POWER CALCULATION
4.-Other losses: 1.5%
Total loss adopted: 25%
Loss factor = 1 - 0.25 = 0.75
SOLAR POWER CALCULATION
Applied to the previous calculation (*)
Photovoltaic energy resulting in AC per day
= Photovoltaic power installed in CC x
Solar Radiation per day x 0.75
For a 1kW (STC) installation consisting of
5 flat 200 watt photovoltaic panels:
It is 5 x 200 Watt = 1000 W = 1kW
Solar radiation accumulated during one day
of 2.9 kW / m² per day
SOLAR POWER CALCULATION
Queretaro, Ecologia 274, Tecnologico (Home): 17° N
Deorientation South: 0°
Type of energy: 110 V AC
Consumption per day White line: 2410 Wh/day
Lightning: 1010 Wh/day
Total: 3420 Wh/day
SOLAR POWER CALCULATION
SYSTEM TENSION: 24 V
DAILY THEORICAL ENERGY: 3420 WH/DAY
PERFORMANCE RATIO: 82.88%
DAILY REAL ENERGY: 4126.45 WH/DAY
SOLAR POWER CALCULATION
PHOTOVOLTAIC FIELD
ANNUAL OPTIMAL SLOPING PER CONSUMING: 21.31°
PHOTOVOLTAIC POWER NEEDED: 993 Wp
SOLAR POWER CALCULATION
MODULE PV CHARACTERISTICS: POLICRYSTALINE
Pmax: 230 Wp Vmp: 29.8 V Voc 37 V
PHOTOVOLTAIC POWER CALCULATED: 920 Wp
NUMBER OF MODULES: 4 IN PARALELE
CHARGE REGULATOR:
OPEN SYSTEM TOTAL INTENSITY: 41.00 A
CLOSED SYSTEM TOTAL INTENSITY: 38.91 A
REGULATOR: 1 unit
A max: 45 A Voc: 48 V Eficiency: 89.6%
A. total 45 A
SOLAR POWER CALCULATION
BATTERIES: 12 UNITS
AUTONOMY: 3 DAYS
DISCHARGE: 60%
USEFUL CAPACITY: 516 Ah
REAL CAPACITY: 860 Ah
TENSION PER UNIT: 2 V
UNITS IN SERIES: 12
SOLAR POWER CALCULATION
INVERSOR CHARGER
W cal 1922 w W Min 1538 w
Max Charge 54 Ah Min Charge 27 Ah
Security factor: 80%
W nominal 3000 W W Continuous 2500 W
Charge Capacity 70
Efficiency 94
Units: 1
SOLAR POWER CALCULATION
Now, calculate the energy needed for your home
SOLAR POWER CALCULATION
www.lawebdelasenergiasrenovables.com
Promedio por meses (datos tomados por sátelites durante 22 años Julio 1983 - Junio 2005).
Radiación Solar Resultados: Coordenadas [ 21 / -100 ] cerca de Querétaro - Queretaro de Arteaga - Mexico
Insolation Incident On A Horizontal Surface (kWh/m^2/day)
Ene Feb Mar Abr May Jun Jul Ago Sep
4.04 4.92 5.86 6.28 6.44 6.03 5.64 5.76 4.71
Minimum Insolation Incident On A Horizontal Surface (kWh/m^2/day)
Ene Feb Mar Abr May Jun Jul Ago Sep
2.76 4.24 5.02 5.48 5.86 5.17 4.54 4.94 3.13
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SOLAR POWER CALCULATION
SOLAR POWER CALCULATION
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