# Solar System sizing consideration factors

## Solar System sizing consideration factors

Require data are following –

1. Estimating the daily or hourly load requirements during a typical year.
2. Calculating the required security of supply, taking into account the back-up source, (if any).
3. Calculating the mean daily irradiation in the plane of the array at the chosen site for every month of a typical year.
4. Considering the maximum number of consecutive sunless days likely to be experienced.
5. Considering the mean daily ambient temperature for every month of a typical year.
6. The estimated cell temperature rise above ambient of the modules in the array.
7. Typical current-voltage characteristics of the module at various irradiances.
8. Selecting DC bus voltage.
9. Considering the maximum allowable depth of discharge of the battery.

10. Estimating percentage energy losses in the battery, power conditioning equipment and control system.

11. Estimating losses in the array from module mismatch, cables and voltage drop across blocking diodes.

12. Calculating the predictable losses from dust and shading.

13. Calculating the global position.

14. Considering the categories of solar modules structure.

15. Choosing the type of solar charge controller such as voltage regulated charger, PWM (Pulse wide modulated), MPPT (Maximum Power Point Tracker).

16. Choosing the type of solar panel such as mono-crystalline, poly-crystalline, thin film.

In practice, designing a PV system depends if it is off-grid or grid-tied.

Off-grid systems require a thorough design, often with several iterations to optimize the number of modules, batteries, and stand-by generators, if necessary, to minimize system costs. Loads must be carefully calculated.

Grid-tied systems generally are sized by one of two methods:

i.            How big of a system is possible with the available budget, i.e. budget constrained.

ii.            How big of a system is possible given a limited area, i.e. area constrained.

NOTE: Systems rarely are large enough to match the load.

Approach is generally used. Also, the PV industry is marketing pre-engineered packages of varying sizes.

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MOHAMMAD SHARIFUL ISLAM, E-mail : sharifuiu@yahoo.com, sharifuiu80@gmail.comCell: +88-01712906384, 01611087343, 01554351552 ________________________________________________________Educational Attainments: Name of Degree: B.Sc. in Electrical and Electronics Engineering (EEE), University : United International University (UIU), Project /Thesis : “Design of a solar charge controller for SHS on Micro-controller Basis” Under, Shahriar Ahmed Chowhury, Assistant Professor,Department of EEE, United International University (UIU), Dhaka, Major Subjects : Power Transmission & Distribution, Power System Protection, Renewable Energy. Name of Examination :Diploma in Engineering, Group : Electronics technology, Board : B.T.E.B, Dhaka, Institution : Comilla Polytechnic Institution. Research and Design Activities:Published Research Papers:01. Design of a solar charge controller for SHS (Solar Home System) on Microcontroller Programming Basis which acts as an automatic switching function mode. Unpublished Research Papers:01. Design a DC 5 Volt power supply, which is specially design for telecommunication sector. It has sustained two modes; one mode is “Grid line on” another mode is “Grid line off” by using high speed switching mode. Quiescent current is very important factor, which device runs all time in telecommunication system. So its quiescent current is too much poor. 02. Design a smart Electronics load, which is used for equipment testing principle in laboratory. Its accuracy is too much better and self power consumption is little. Its act on voltage to current conversion.On Going Research & Design Activities:01. To remove traffic jam in systematically at City corporation area in Bangladesh and illegal car occurrence in the road to bring to a close within a network by using unique code method.02. To electrification by using solar energy in rural and urban area and design a solar power plant. Working Experiences:01. Serve as a “Section In-Charge (Hardware Assembling Wing)” from September, 2010 to current time at Design & Development Department in Solar Intercontinental (SOLARIC) Ltd, Baridhara, Dhaka.Job Details: a. Dedicated for System Design to implementation through the appropriate ways; design various power electronics circuits to execution in solar system by using latest electronics circuit design software such LT spice, PI Expert, Circuit Maker, etc. There has a lot of barrier in Solar Home System (SHS), which problems to solve by using efficient electronics circuit.b. Design new circuit diagram in the application level by using LT Spice and MATLAB software according to cost effective. c. Design new PCB board by using Circuit Maker software.d. To build new PCB board according to the design. e. Preparation of technical proposal reports and to establish document controls. f. Designing of off-grid power solutions and other power systems including preparation of drawing and specifications, bills of quantities etc.g. Ensuring correct standards are maintained in the designs and implementation of projects mainly in off-grid and general earthworks.h. Dedicated for System Design to implementation through the appropriate ways, i.Design various power electronics circuits to execution in solar system by using latest electronics circuit design software such LT spice, PI Expert, Circuit Maker, etc. There has a lot of barrier in Solar Home System (SHS), which problems to solve by using efficient electronics circuit.,j. Create designs by looking at what the systems need to do, environmental impact, costs, and customer needs.k. Fine tune engineering designs. Consider cost, service, or impact on the natural environment.l. Plan the layout of electrical systems. Use natural lighting and other options to use less electricity.m. Inspect systems to make sure the work meets standards for quality, safety, and environmental impact.n. Evaluate operation of equipment and systems.o. Test ways to improve energy efficiency for electronics. These include cell phones, computers, and televisions.p. Build equipment and systems that do work more efficiently. Select parts that work together the best or adjust how the devices work at different times.q. Research and invent new technologies that use less energy.r. Fix problems with electrical equipment and systems. This may include finding the problem, making a repair plan, and fixing the problem.s. Develop budgets that show the full costs of a project.02. Served as a “Test Engineer” from February, 2010 to August, 2010 at Design & Development Department in Power IC Limited, Baridhara, Dhaka.Job Details: a. By using various methods to the IC test. b. Design the various analog IC in the application level.c. Ensuring to the quality products,d. Maintaining to production chain.e. Design new circuit diagram in the application level by using LT Spice and MATLAB software according to cost effective. f. Design new PCB board by using Circuit Maker software.g. To build new PCB board according to the design. h. Preparation of technical proposal reports and to establish document controls. i. Designing of off-grid power solutions and other power systems including preparation of drawing and specifications, bills of quantities etc.j. Ensuring correct standards are maintained in the designs and implementation of projects mainly in off-grid and general earthworks.03. Serve as an “Assistant Manager” from January, 2009 to January, 2010 at Design & Development Department in Easy Electronics, Shymoly, Dhaka.Job Details: a. Ensure technical support to the consumers. b. Common electrical fault finding & trouble shooting, design to the digital switching circuit which acts on automatic mode while microcontroller by using PLC mode, c. Responsible for project records, documentation acceptance to customersd. Preparation of technical proposal reports and to establish document controls. e. Designing of off-grid power solutions and other power systems including preparation of drawing and specifications, bills of quantities etc.f. Ensuring correct standards are maintained in the designs and implementation of projects mainly in off-grid and general earthworks.g. Supervise construction of off-grid installation projects undertaken directly or by contract.h. Planning, directing, and controlling operation and maintenance of off-grid installation works in the areas of operation.i. Training of technical support staff and other officers working in the various project teams04. Serve as an “Assistant Engineer” from September, 2007 to December,2008 at Design & Development Department in msi technology, Mohammadpur, Dhaka.Job Details: a. Repairing to the control circuit board, b. Common electrical fault finding & trouble shooting, design to the digital switching circuit which acts on automatic mode while microcontroller by using PLC mode, c. Dedicated responsible for computer hardware trouble shooting & networking problems solutions with most popular electrical engineering software. d. Designing of off-grid power solutions and other power systems including preparation of drawing and specifications, bills of quantities etc.e. Ensuring correct standards are maintained in the designs and implementation of projects mainly in off-grid and general earthworks.f. Supervise construction of off-grid installation projects undertaken directly or by contract.g. Planning, directing, and controlling operation and maintenance of off-grid installation works in the areas of operation.h. Training of technical support staff and other officers working in the various project teams. 05. Served as an “Assistant Engineer” from June, 2007 to August, 2007 at Electrical Engineering Department in The Pink City Xenovelly Model Town P(v)t ltd. Kalabaghan lake circle, Dhanmondi, Dhaka.Job Details: a. To maintenance the generator & motor, common electrical fault finding in the city. b. To build relationship with outdoor service provider and indoor worker.c. To sketch the electrical wiring with respect to the minimum costing.d. Ensuring the quality of electrical appliances in the city.06. Served as Program Assistant from September, 2003 to May, 2007 in Research and Development Department under Solar Energy Wing at Centre for Mass Education in Science (CMES), Dhanmondi, Dhaka, Bangladesh.Job Details: a. Adoptive Research on Solar Electricity, b. Renewable Energy, Light Emitting Diode (LED), control to the production chain, c. Repairing to the circuit board, d. Field visiting & SHS (Solar Home System) installation to the outdoor of office.e. Solar Home System Commercializationf. Design and Implementation of assigned Solar Home Systemg. Procurement to the electrical and electronics equipment with a team.h. Preparing to the training schedule, module and training materials.i. Train up to the technicians and resource persons in the field level.Achievements: Develop Solar Charge Controller, Ballast Circuit and Low Powered light.