Solar Based Project For Work From Home:-

            We are going to discussed on Solar Based Project For Work From Home such type projects are very use full on this current situation.One day I thanked on this topic in our India top four IT cities are named as:-

• Bangalore 
• Mumbai 
• Hyderabad 
• Chennai & 16 More Cities 

              Information Technology in India is an industry consisting of two major components: IT services and business process outsourcing (BPO). As of 2020, India's IT workforce accounts for 4.36 million employees.The United States accounts for two-thirds of India's IT services exports.The sector has increased its contribution to India's GDP from 1.2% in 1998 to 7.7% in 2017.

            Out these employees most of the employees are belongs rural,village and remote areas. There is no proper facility for electricity supply in all these areas.If they are want to work from home at this time then they are thanked that there are no power supply in our village. Hence I am going to explain Solar Based Project For Work From Home .

Single Line Diagram of This Project :-

            In above single line diagrams solar PV wire connected with meter and ammeter in this meter top side red digit shows system voltage and blue colour digit shows system current in amps.Direction of current flowing is also shown in Figure. We are also put a MCB between SPV module and Solar Charge Controller (Solar Charge controller is an electronic device that is protect our battery for over charging and deep discharging). In our solar charge controller has six port solar ,batter and load positive & negative. By passing the volt meter and ammeter charge controller connected with battery and also in the same manner charge controller connected with converter inverter (Convert DC current into AC current).Between the AC loads and inverter we are place a MCB .

General Equipment's Are Require a Software Engineer:

1. Laptop charger,Lenvo ThinkPad,170 W 
2. Mobile Charger,15 W
3. LED Tube light,20 W
4. WiFi Router,12 W
5. Wall Mounted Fan (Like Bank or Office),60W

Load Estimation :-

            Calculation of AC Load Energy Requirement -

S.No.	Appliances	Load Wattage	No. of Appliances	Operating Hour’s	Total Consumption (Watts)
1	LED Tube Light	20	1	10	200
2	WiFi Router	12	1	12	144
3	Laptop Charging	170	1	8	1360
4	Wall Fan	55	1	12	660
5	Mobile Charging	15	1	2	30
6	Total Consumption in Watts				2,394 Watts

Total Daily Watt Hour (Wh) Per Day = 2,394 Wh

• Note:- A rough estimate the average rated power of a WiFi router is between 3 watt to 20 watt. For average home WiFi routers you can take 6 watts as rated power for calculation.

Electronics Component Selection:

  (A)Inverter Capacity Selection 

Load			Inverter
Total Wattage of Load (W)	Efficiency (%)	Out Put Wattage (W)	Inverter (VA)
272	93	272	Output (W) X 100 / Efficiency (272 X 100)/93 =  292.47 ≈ 300 VA

        Estimation of required input energy to the inverter for a given energy consumption of all the loads.

Total Energy (Wh)	Efficiency (%)	Total Energy (Wh)
2394	93	2394 X (100/93) ≈ 2600 Wh

Inverter Data Sheet 

  (B)Solar Charge Controller Selection: 

Energy (Wh)	Wattage	Voltage	Maximum Current (A)
2600	292	12 V	292/12=24.33 ≈ 25 Amps

                Here , The System Voltage is 12 V 

Energy (Wh)	Wattage	Voltage	Maximum Current
2600	300 VA	12 V	25 Amps

We need to Supply 2600 Wh energy to the input of the inverter with system voltage 12 V, Now we are calculate reacquired Ah capacity 

                            Ah Capacity = Wh ÷ V

                                                 = V X I X H ÷  V

                                                 = 2600÷ 12

                                                 =216.66 Ah ,  This Energy is Required On a Single Day 

Day of Autonomy: The Battery in this system store energy to supply the power to the load during non-sunshine hours. In this situation like rainy or winter session,it is possible that the sun is not available one or two days.

here we are consider 2 days of autonomy days,one day for today and another one day for tomorrow (Next Day).

Battery Sizing:

            The battery use for Solar PV system must be rechargeable ,allow to deep discharge should have long life span ,easily serviced and have high capacities and low self discharge 

(A) Battery Capacity 

Battery has certain parameter Like DoD which is consider here 50%

We are assume 12 V, 150 Ah battery on this system 

Energy (Wh)	System Voltage (V)	Battery Capacity (Ah)	DoD (%)	Actual Battery Capacity (Ah)
2600	12 V	2600÷ 12 = 216.6	50	216÷0.5=435

Battery Specification

(B) Standered Battery Capacity Available 

Here e are consider only one day of Autonomy 

Actual Battery Capacity  (Ah)	Standered Battery Capacity In   (Ah)	Total No. of Batteries
435	150	435 ÷ 150 = 2.90 ≈ 3

• No. of Battery =3
• system Voltage =12 V
• Standered Battery Voltage = 12 V
• Series Connection = 12 ÷ 12 =1
• Parallel Connection = 3÷1 = 3

Thus total battery capacity will be 

                    3 X 150 Ah = 450 Ah 

                     450 X 12 = 5400 watts or 5.4 Kwh 

Means this system can release 2 to 4 unit electricity on  daily basis. If we are see on monthly basis then it will be generate 120 unit electricity per month 

Here we are consider only two day of Autonomy 

Actual Capacity After DoD (Ah)	Numbers of day of autonomy	Finel Required Battery Capacity  (Ah)
435	2	435 X 2 = 870 ≈ 900

Actual Capacity After DoD (Ah)	Standered Battery Capacity In (Ah)	Total No. of Battery
900	150	900 ÷ 150 = 6

• No. of Battery =6
• system Voltage =12 V
• Standered Battery Voltage = 12 V
• Series Connection = 12 ÷ 12 =1
• Parallel Connection = 6÷1 = 6

Thus total battery capacity will be 

                    6 X 150 Ah = 900 Ah 

                     900 X 12 = 10,800 watts or 10.8 Kwh 

Means this system can release 10 to 12 unit electricity on  daily basis. If we are see on monthly basis then it will be generate 310 unit electricity per month.

Note:  One thing to note here is that if we are increasing Autonomy Day, then the number of batteries and the power are increasing accordingly.

Here we are proceed with one day of autonomy day

Solar Photovoltaic Module Sizing:

(A) Energy Calculation 

Total Energy (Wh)	Battery Efficiency	Energy From SPV Module (Wh)
2600	88%	2600 ÷ 0.88 =2954 ≈ 2955

(B) SPV Module Wattage Estimation 

Energy from SPV Module	No. of Shun Shine Hours (h)	SPV Module Wattage (W)
2955	5	2955 ÷ 5 = 591≈ 600

(C)Standered Module Capacity :

Actual SPV Module Capacity In (W)	Standered SPV Module Capacity In (W)	Total No. of SPV Module
600	200	600 ÷ 200 =  3

(D) No. of SPV Module Series & Parallel Connection:

No of SPV Modules	System Voltage (V)	Standard SPV Module Voltage (V)	Series Connection	Parallel Connection
3	12	12	12  ÷  12 =1	2 ÷  1 = 3

Solar Photovoltaic Module Datasheet 

Summary:-

1. Solar PV Module 12V,200Wp - 3No's
2. PCU Inverter 300VA - 1 No's
3. Battery 12V,150Ah- 3 No,s 
4. Other miscellaneous Equipment- As per site requirement

Customer can choose his brand as per his choice. And install it on our house roof. Battery should be installed in a cool place for prevention of direct heating. Due to access heating of battery or any other electrical equipment loses there efficiency.

        In next topic i will discuss on BOQ and cost of the total Plant. 

* Such Type system are suitable for village areas or remote & hilly area where the proper electricity transmission and distribution are not possible.

System Backup Time:-

Load	2300 W	1200 W	600 W	300 W	150 W	100 W
Duration	2 hrs.10 mint	3 hrs. 30 mint	7 hrs.	15 hrs.	30 hrs.	45 hrs. 30 mint

** In this context i want to said that the above backup time calculated on the behalf of 50% DoD