On this weblog we'll try to help you understand easy methods to design cost effective Photo voltaic PV System for Avenue Mild.

## First of all let's begin from basics: What's solar PV system?

Solar energy system is one among renewable energy sources which makes use of photo voltaic PV modules to convert sunlight into electricity. The vitality generated can be either saved or used immediately, fed again into grid line or combined with a number of different electricity or different renewable power supply. Photo voltaic system is essentially the most reliable and clean source of electricity that can go well with a wide range of applications akin to residence, business, agriculture, livestock, etc. Of course, if the primary condition is achieved: Enough Solar hours.

consists of different components that should be chosen in response to your system kind, site location and applications. The main elements for solar avenue mild system are solar panel, solar cost controller, battery, inverter, pole, LED Light.

## Under we will briefly point out primary options of every part:

• PV module - converts sunlight into DC electricity.

• Photo voltaic cost controller - regulates the voltage and current coming from the PV panels going to battery and prevents battery overcharging and prolongs the battery life.

• Battery - stores vitality for supplying to electrical appliances when there is a demand.

• Load - is electrical appliances that connected to photo voltaic PV system equivalent to lights, wifi, digital camera, etc,

Now when you realize the basics about all components it is extremely useful to undersdand how one can design and decide the most effective system in your solar street light project. To be able to that it's best to:

## 1. Determine what's energy consumption of your road gentle

Step one in designing a photo voltaic street gentle system is to find out the overall energy and power consumption of LED mild and different components that can need to be supplied by photo voltaic energy, such as WiFi, Camera etc. have to be supplied by the photo voltaic PV system.

## How to calculate whole consumption of your solar led street light specifications [elton9469260.waphall.com] system? Merely observe the steps beneath:

1.1 Calculate whole Watt-hours per day for every part used.

Add the Watt-hours needed for all elements together to get the overall Watt-hours per day which

must be delivered to the appliances.

1.2 Calculate total Watt-hours per day wanted from the PV modules.

Multiply the overall appliances Watt-hours per day occasions 1.3 (the vitality lost in the system) to get the total Watt-hours per day which must be provided by the panels.

## Image: solar road mild solutions from: www.engoplanet.com

2. What is the dimensions of the Solar Panel wanted for my Photo voltaic Avenue Light system?

Different measurement of solar PV modules will produce totally different amount of energy. To seek out out the sizing of PV module, the full peak watt produced needs. The peak watt (Wp) produced will depend on size of the PV module and climate of site location. We have now to consider "panel generation factor" which is totally different in each site location. For Thailand, the panel generation issue is 3.43. To find out the sizing of PV modules, calculate as follows:

2.1 Calculate the whole Watt-peak ranking needed for PV modules

Divide the full Watt-hours per day wanted from the PV modules (from item 1.2) by 3.Forty three to get

the whole Watt-peak ranking needed for the PV panels wanted to function the appliances.

2.2 Calculate the number of PV panels for the system

Divide the reply obtained in item 2.1 by the rated output Watt-peak of the PV modules available

to you. Increase any fractional part of end result to the following highest full quantity and that will be the

number of PV modules required.

Results of the calculation is the minimal variety of PV panels. If extra PV modules are installed, the system will carry out higher and battery life might be improved. If fewer PV modules are used, the system could not work in any respect during cloudy durations and battery life might be shortened.

## 3. Battery sizing

The battery kind advisable for utilizing in solar PV system is deep cycle battery. Deep cycle battery is specifically designed for to be discharged to low energy degree and speedy recharged or cycle charged and discharged day after day for years. The battery must be massive enough to store adequate power to operate the appliances at night and cloudy days. To search out out the size of battery, calculate as follows:

3.1 Calculate whole Watt-hours per day utilized by appliances.

3.2 Divide the overall Watt-hours per day used by 0.Eighty five for battery loss.

3.Three Divide the reply obtained in item 3.2 by 0.6 for depth of discharge.

3.Four Divide the reply obtained in item 3.Three by the nominal battery voltage.

3.5 Multiply the answer obtained in merchandise 3.4 with days of autonomy (the variety of days that you just need the system to operate when there isn't a power produced by PV panels) to get the required

Ampere-hour capacity of deep-cycle battery.

Battery Capacity (Ah) = Total Watt-hours per day utilized by appliances x Days of autonomy

(0.85 x 0.6 x nominal battery voltage)

## 4. Photo voltaic charge controller sizing

The solar cost controller is often rated towards Amperage and Voltage capacities. Select the photo voltaic cost controller to match the voltage of PV array and batteries after which determine which kind of solar cost controller is correct on your application. Guantee that solar charge controller has enough capacity to handle the current from PV array.

For the series charge controller type, the sizing of controller is dependent upon the whole PV input current which is delivered to the controller and likewise is determined by PV panel configuration (series or parallel configuration).

According to standard follow, the sizing of photo voltaic cost controller is to take the short circuit present (Isc) of the PV array, and multiply it by 1.3

## Solar cost controller ranking = Complete quick circuit present of PV array x 1.3

Remark: For MPPT charge controller sizing will be completely different. (See Fundamentals of MPPT Charge Controller)

## Instance: A house has the following electrical equipment utilization:

One 18 Watt fluorescent lamp with digital ballast used four hours per day.

## One 60 Watt fan used for 2 hours per day.

One seventy five Watt refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours.

## The system might be powered by 12 Vdc, one hundred ten Wp PV module.

1. Determine energy consumption demands

## Complete equipment use = (18 W x 4 hours) + (60 W x 2 hours) + (75 W x 24 x 0.5 hours)

= 1,092 Wh/day

## Total PV panels power wanted = 1,092 x 1.3

= 1,419.6 Wh/day.

## 2. Measurement the PV panel

2.1 Total Wp of PV panel capability

needed= 1,419.6 / 3.4

## = 413.9 Wp

2.2 Number of PV panels wanted= 413.9 / one hundred ten

## = 3.76 modules

Actual requirement = four modules

So this system must be powered by at the least 4 modules of a hundred and ten Wp PV module.

3. Inverter sizing

Whole Watt of all appliances = 18 + 60 + 75 = 153 W

For security, the inverter ought to be thought of 25-30% larger measurement.

The inverter size must be about 190 W or larger.