How to Design Solar PV System. What is solar PV system? Solar photovoltaic system or Solar power system is one of renewable energy system which uses PV modules to convert sunlight into electricity. The electricity generated can be either stored or used directly, fed back into grid line or combined with one or more other electricity generators or more renewable energy source.
Solar PV system is very reliable and clean source of electricity that can suit a wide range of applications such as residence, industry, agriculture, livestock, etc. Major system components.
Solar PV system includes different components that should be selected according to your system type, site location and applications. The major components for solar PV system are solar charge controller, inverter, battery bank, auxiliary energy sources and loads (appliances).• PV module – converts sunlight into DC electricity.• Solar charge controller – regulates the voltage and current coming from the PV panels going to battery and prevents battery overcharging and prolongs the battery life.• Inverter – converts DC output of PV panels or wind turbine into a clean AC current for AC appliances or fed back into grid line.• Battery– stores energy for supplying to electrical appliances when there is a demand.• Load – is electrical appliances that connected to solar PV system such as lights, radio, TV, computer, refrigerator, etc. Auxiliary energy sources - is diesel generator or other renewable energy sources. Solar PV system sizing. Determine power consumption demands. The first step in designing a solar PV system is to find out the total power and energy consumption of all loads that need to be supplied by the solar PV system as follows.
Calculate total Watt- hours per day for each appliance used. Add the Watt- hours needed for all appliances together to get the total Watt- hours per day which must be delivered to the appliances. Calculate total Watt- hours per day needed from the PV modules.
2012 Jim Dunlop Solar Chapter 9 System Sizing. Sizing Principles Interactive vs. Stand -Alone Systems Calculations and Software Tools. Sizing is the basis for PV system designs, and determines the ratings for the PV array. ESCI61 Introduction to Photovoltaic Technology Ridha Hamidi, Ph. D. PV System Design and Sizing. 2. 3 Designing PV Systems. • Most PV system designers, and design tools like. The most important aspects of designing a solar array is sizing module strings to operate within the parameters of the inverter and REA has it''s own free tool. Home > Support > How to Design Solar PV System: How to Design Solar PV System: What is solar PV system? Solar photovoltaic system or. Solar PV system sizing. 1. Determine power consumption demands.
PV Array Sizing for kWh. Tweet. Share. Email Print. By: Justine Sanchez. Published In. The first step in going solar is not sizing the PV system, but reducing your electricity usage through conservation and efficiency.
Multiply the total appliances Watt- hours per day times 1. Watt- hours per day which must be provided by the panels. Size the PV modules. Different size of PV modules will produce different amount of power. To find out the sizing of PV module, the total peak watt produced needs.
The peak watt (Wp) produced depends on size of the PV module and climate of site location. We have to consider “panel generation factor” which is different in each site location. For Thailand, the panel generation factor is 3.
PV design software to create solar panel layouts and generate. Utilize our extensive suite of tools to efficiently design your system. We use SolarDesignTool on a daily basis to design residential solar energy systems. Overview. Introducing a Reliable Green Technology That Can Help Improve System Performance. Solely centered on photovoltaic (PV) system sizing and the tools used for PV system analysis and design, Photovoltaic System Design.
To determine the sizing of PV modules, calculate as follows. Calculate the total Watt- peak rating needed for PV modules. Divide the total Watt- hours per day needed from the PV modules (from item 1. Watt- peak rating needed for the PV panels needed to operate the appliances. 2.
Calculate the number of PV panels for the system. Divide the answer obtained in item 2. Watt- peak of the PV modules available to you. Increase any fractional part of result to the next highest full number and that will be the number of PV modules required. Result of the calculation is the minimum number of PV panels.
If more PV modules are installed, the system will perform better and battery life will be improved. If fewer PV modules are used, the system may not work at all during cloudy periods and battery life will be shortened. Inverter sizing. An inverter is used in the system where AC power output is needed. The input rating of the inverter should never be lower than the total watt of appliances.
The inverter must have the same nominal voltage as your battery. For stand- alone systems, the inverter must be large enough to handle the total amount of Watts you will be using at one time. The inverter size should be 2. Watts of appliances. In case of appliance type is motor or compressor then inverter size should be minimum 3 times the capacity of those appliances and must be added to the inverter capacity to handle surge current during starting. For grid tie systems or grid connected systems, the input rating of the inverter should be same as PV array rating to allow for safe and efficient operation.
Battery sizing. The battery type recommended for using in solar PV system is deep cycle battery. Deep cycle battery is specifically designed for to be discharged to low energy level and rapid recharged or cycle charged and discharged day after day for years. The battery should be large enough to store sufficient energy to operate the appliances at night and cloudy days. To find out the size of battery, calculate as follows.
Calculate total Watt- hours per day used by appliances. Divide the total Watt- hours per day used by 0.
Divide the answer obtained in item 4. Divide the answer obtained in item 4. Multiply the answer obtained in item 4. PV panels) to get the required Ampere- hour capacity of deep- cycle battery.
Battery Capacity (Ah) = Total Watt- hours per day used by appliances x Days of autonomy(0. Solar charge controller sizing. The solar charge controller is typically rated against Amperage and Voltage capacities. Select the solar charge controller to match the voltage of PV array and batteries and then identify which type of solar charge controller is right for your application.
Make sure that solar charge controller has enough capacity to handle the current from PV array. For the series charge controller type, the sizing of controller depends on the total PV input current which is delivered to the controller and also depends on PV panel configuration (series or parallel configuration).
According to standard practice, the sizing of solar charge controller is to take the short circuit current (Isc) of the PV array, and multiply it by 1. Solar charge controller rating = Total short circuit current of PV array x 1. Remark: For MPPT charge controller sizing will be different. See Basics of MPPT Charge Controller)Example: A house has the following electrical appliance usage.
One 1. 8 Watt fluorescent lamp with electronic ballast used 4 hours per day. One 6. 0 Watt fan used for 2 hours per day. One 7. 5 Watt refrigerator that runs 2. The system will be powered by 1.
Vdc, 1. 10 Wp PV module. Determine power consumption demands. Total appliance use = (1. W x 4 hours) + (6. W x 2 hours) + (7.
W x 2. 4 x 0. 5 hours) = 1,0. Wh/day. Total PV panels energy needed = 1,0. Wh/day. 2. Size the PV panel. Total Wp of PV panel capacity needed= 1,4. Wp. 2. 2 Number of PV panels needed= 4. Actual requirement = 4 modules So this system should be powered by at least 4 modules of 1. Wp PV module. 3. Inverter sizing.
Total Watt of all appliances = 1. WFor safety, the inverter should be considered 2. The inverter size should be about 1. W or greater. 4. Battery sizing. Total appliances use = (1.
W x 4 hours) + (6. W x 2 hours) + (7. W x 1. 2 hours)Nominal battery voltage = 1.
VDays of autonomy = 3 days Battery capacity = [(1. W x 4 hours) + (6. W x 2 hours) + (7. W x 1. 2 hours)] x 3 (0.
Total Ampere- hours required 5. Ah So the battery should be rated 1. V 6. 00 Ah for 3 day autonomy. Solar charge controller sizing. PV module specification. Pm = 1. 10 Wp. Vm = 1. Vdc. Im = 6. 6 AVoc = 2.
AIsc = 7. 5 ASolar charge controller rating = (4 strings x 7. A) x 1. 3 = 3. 9 A So the solar charge controller should be rated 4. A at 1. 2 V or greater.