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In order to determine the size of solar panels, solar batteries and charge controllers, it is necessary to first know how many DC loads there are in the house and how much energy the loads consume. Suppose a house has 6 lamps of 10 watt each. The lamps run for 6 hours daily and there are 2 fans of 15 watt, the fans run for 10 hours daily. How much energy does this lamp fan consume? We know that energy is expressed by E. Then our calculation will be E = P × T
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First multiply the energy consumption of the lamp, the energy consumption of the lamp = there are 6 lamps, the wattage of each lamp is 10 watts, multiply the wattage by the lamp. The lamps run for 6 hours daily, now multiply by 6. (6×10w×6h) = 360wh. Now the energy consumption of the fan has to be increased. Fan energy consumption = There are 2 fans wattage of each fan is 15 watts Multiply the wattage by the number of fans Each fan runs for 10 hours per day. Then multiply the energy consumption of 10h fan = 2×15w×10h = 300wh then the total energy consumption of 6 lamps and three fans is 360wh + 300wh = 660wh, then the total energy consumption of that house is 660wh. Along with the total energy consumption, some other costs have to be caught. Such as cable loss switching loss or future load may increase further. Therefore, with this total energy consumption, another 15% cost must be added. Then 15% of totor consumption = 99wh Total energy consumption is 660wh plus another 99wh. Then the total energy consumption will be 660wh + 99wh = 759wh thus the total energy consumption of the house must be multiplied first. micro project bangla solar panel calculation.
Now multiply how many ampere batteries will be required for 759wh energy consumption.
Battery Ah = Total Energy Consumption ÷ Battery Voltage (If the battery is 12 volts then calculate as 12, if the battery is 24 volts then calculate as 24 and if the battery is 6 volts then calculate as 6) Battery Ah = 759wh ÷ 12 I am calculating using a 12 volt battery = 63.25Ah. 63.25Ah battery is not available in the market then you need to buy 60Ah battery or buy two 30Ah batteries. Micro project bangla solar system tutorial,
Now determine the size of the solar panel. To find out how many watts of solar panel to charge this 60Ah battery, you must first calculate the amount of energy required to charge the battery.
First we will determine the battery power, battery power = battery Ah × battery voltage = 60Ah × 12 I will use 12 volt battery so multiply by 12, if you use 6 volt battery multiply by 6 and if you use 24 volt battery multiply by 24 = 720wh So 720wh power will be required to charge the 60Ah battery. how to install solar panel micro project bangla channel.
Now determine the size of the solar panel. Then the size of the solar panel will be, Solar panel size = battery power ÷ charging time. Charging Time The maximum time a solar panel can charge a battery is called charging time. Charging time is assumed to be six hours considering the whole year. Because charging time is more available only during summer but less charging time is available during rainy season and winter. 720wh ÷ 6 = 120 watts. A 120 watt solar panel will be used to charge the 60ah battery.
Now select the size of the charge controller. To determine the size of the charge controller, first figure out how much DC load the house uses. There are lamps in the house = 6, wattage of each lamp is 10w = 6 × 10 watt = 60 watt
There are 2 fans in the house, the wattage of each fan is 15 watt = 2 × 15 = 30 watt, then the total DC load in the house is 60 watt + 30 watt = 90 watt.
We know the formula to increase the current in DC load is I = P ÷ V = 90w ÷ 12 = 7.5Amp So the total DC load in the house is 7.5 Ampere then the size of the charge controller will be 10Amp, but there is no problem if using the charge controller of more Ampere. More benefits will be available.
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