Comparative Analysis of the Energy Supply of Poly and Mono

Crystalline Solar Panels in the Rooftop on Grid

I Nyoman Sugiarta, I Nengah Suparta and I Wayan Teresna

Electrical Engineering, Bali State Polytechnic, Jimbaran, Bali, 80361, Indonesia

Keywords: Poly Crystalline Solar Panels, Mono Crystalline Solar Panels, Rooftop on Grid, Series Circuit and Energy.

Abstract: To support the government program that proclaimed "green energy" and energy savings or energy efficiency,

especially the use of electrical energy, the authors need to conduct research on the use of solar renewable

energy sources as additional power sources, especially during the day combined with electrical energy sources

from State Electricity Company. Solar power plant has several systems such as on grid, off grid and hybrid.

Solar power plant rooftop on grid is run in parallel with the State Electricity Company network without

batteries. The on-grid solar inverter is connected directly to the State Electricity Company network so that the

output generated from the solar panels simultaneously serves the load. The solar panels used for this system

are mono crystalline and poly crystalline. The author will conduct testing and measurements for 4 hours from

10.00 – 14.00 for 28 days in Denpasar City, Bali Indonesia is located at coordinates 8.67 south latitude and

115.21 east longitude using empirical methods. The total energy produced by two poly crystalline 100 Wp

solar panels in series is 12.84 kWh, two mono crystalline 100 Wp is 12.22 kWh and a combined mono-poly

crystalline 200 Wp solar panel is 9.98 kWh. The average electrical energy produced by two poly crystalline

100 Wp solar panels arranged in series in various weather is 0.46 kWh/day, two poly crystalline 100 Wp solar

panels is 0.44 kWh/day and combined mono-poly crystalline 200 Wp solar panels by 0.36 kWh/day. It can be

concluded that the series circuit two poly crystalline 100 Wp solar panels is able to obtain maximum electrical

energy in the on-grid system by using a smart inverter compared to two 100 Wp mono crystalline and mono-

poly crystalline 200 Wp solar panels.

1 INTRODUCTION

Solar power plant Rooftop On Grid is run in parallel

with the State Electricity Company network without

batteries. The On Grid solar inverter is connected

directly to the State Electricity Company network so

that the output generated from the solar panels

simultaneously serves the load. If the load is the same

as the solar power plant production, then all solar

power plant output is used for the load without

assistance from the State Electricity Company

network. If the load is less than the solar power plant

production, then some of the solar power plant output

is used for the load and the rest is channeled to State

Electricity Company. If the load is greater than the

solar power plant production, then all the solar power

plant output is absorbed by the load and the shortage

is assisted by State Electricity Company. If there is no

solar power plant production, such as at night or on a

cloudy and rainy day then all the loads will be served

by State Electricity Company. The advantage of the

On Grid solar power plant system is that it can carry

out the export-import process of electricity to State

Electricity Company.

Monocrystalline technology has the best

performance compared to polycrystalline while

amorphous technology has the latest performance.

The station is connected with a total capacity of 5.94

kWp, which is located on the roof of the Tetouan-

Morocco science faculty (Ilham, 2017).

Monocrystalline and polycrystalline panels have

higher efficiency resulting in better performance than

thin film panels on a sunny day. Another situation

occurs, when the solar panels are blocked by leaves

falling from trees or clouds. Monocrystalline and

polycrystalline panels cannot generate any electrical

energy. Thin film solar panels can produce a greater

total amount of energy per year than monocrystalline

and polycrystalline panels. These panels can work in

partial shade with foreign bodies and indirect sunlight

(Michal, 2019).

Sugiarta, I., Suparta, I. and Teresna, I.

Comparative Analysis of the Energy Supply of Poly and Mono Crystalline Solar Panels in the Rooftop on Grid.

DOI: 10.5220/0010945000003260

In Proceedings of the 4th International Conference on Applied Science and Technology on Engineering Science (iCAST-ES 2021), pages 335-338

ISBN: 978-989-758-615-6; ISSN: 2975-8246

 2023 by SCITEPRESS – Science and Technology Publications, Lda. Under CC license (CC BY-NC-ND 4.0)

335

Increasing light intensity and decreasing relative

humidity results in higher efficiency of

monocrystalline PV modules when compared to

polycrystalline PV modules (Orotoye, 2020).

The efficiency of the solar panel changes when

given light with a certain energy, up to the highest

intensity of 331.01 W / m2, with the highest

temperature occurring resulting in an efficiency of

12.84% on Monocrystalline Panels and 11.95% on

Polycrystalline Panels (Sugianto, 2020).

Installation of solar panels on the on grid system

can be arranged in series, parallel and a combination

of series and parallel. From the results of research that

the author did previously on polycrytalline solar

panels, it turns out that a series circuit that produces

an energy supply of 100 Wh is greater than a parallel

circuit (Sugiarta, 2020).

The results of testing the installation of a solar

power plant with a capacity of 50 Wp can be

concluded that the highest efficiency occurs at a slope

angle of 16

and at 09:00 hours with a value of

46.076%, then the second occurs at a slope angle of 8

and at 09:00 hours with a a value of 45.052%, then

the lowest efficiency occurs at a slope angle of 0

and

at 09:00 with a value of 43,986 % (Yano, 2019).

Based on several existing journals, the author

plans a research analysis of the comparative analysis

of the energy supply of poly and mono crystalline

solar panels in the rooftop on grid solar power plant

series. The on grid system was chosen because it is

simpler in terms of maintenance and installation. The

target is for housing, offices and small industries

located in urban and rural areas that already have

electricity from State Electricity Company. The

results of this study can be used as a reference for the

installation of solar panel types for rooftop solar on

grid systems in the city of Denpasar, Bali. The greater

the supply of energy produced will have an impact on

reducing the State Electricity Company bill. This will

be useful for households, schools, campuses and

small industries that use more electricity during the

day.

2 METHOTOLOGY

In this research, the steps involved include research

flow diagrams, literature studies, system planning,

selection of materials and measuring instruments.

2.1 Research Flow Chart

The research flow chart can be seen as shown in the

figure 1.

Figure 1: Research Flow chart.

2.2 System Planning

The rooftop solar panel system is installed on the roof

of the car garage which has a slope of 17 degrees

facing north which has a great potential for sunlight

so that the solar panels get the maximum supply of

sunlight. The system planning can be seen as shown

in the figure 2.

Figure 2: Rooftop On Grid Energy Measurement.

2.3 Materials and Instruments

The materials and measuring instruments used in this

research are as follows:

1. Solar panels Mono and Polly Crystalline 100 Wp.

2. Solar Smart Microinverter SG 350-600.

3. DataBox – Data Collector (Model DataBox24G).

4. High-precision watt meter.

5. AC Wattmeter digital 0-3680 Watt.

6. DC Wattmeter digital 0-3680 Watt

7. Solar Power Meter

8. MC4 Solar Panel PV Cable Connector

9. 30m 6 mm Solar Cell Red-Black Power Cable.

10. 20m cable 3x2.5 mm state electricity company.

11. Stop contact

12. Switch

13. Aluminum Ladder

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Measurement and data collection were carried out

empirically at the same time using a data box

connected to a computer.

3 RESULTS AND DISCUSSION

3.1 Research Objectives and Location

This research was conducted at Kodya Denpasar, Bali

Indonesia. Kodya Denpasar is located at coordinates

8.67 south latitude and 115.21 east longitude.

3.2 Research Data

Tests and measurements for 4 hours from 10.00 –

14.00 for 28 days in Denpasar City, Bali Indonesia is

located at coordinates 8.67 south latitude and 115.21

east longitude using empirical methods. The total

energy produced by two poly crystalline 100 Wp

solar panels assembled in series is 12.84 kWh, two

mono crystalline 100 Wp is 12.22 kWh and a

combined mono-poly crystalline 200 Wp solar panel

is 9.98 kWh as shown in the table 1 and figure 3

below.

Table 1: Energy measurement data (kWh) generated by

solar panels.

Weather Date Poly P-M Mono

Clear 12-Apr-21 0.38 0.31 0.36

Clear 13-Apr-21 0.5 0.35 0.41

Clear 14-Apr-21 0.5 0.38 0.48

Cloudy 15-Apr-21 0.38 0.39 0.4

Cloudy 16-Apr-21 0.51 0.38 0.48

Cloudy 19-Apr-21 0.51 0.36 0.47

Clear 20-Apr-21 0.53 0.36 0.49

Clear 21-Apr-21 0.53 0.37 0.49

Clear 23-Apr-21 0.52 0.37 0.48

Clear 24-Apr-21 0.51 0.37 0.47

Clear 25-Apr-21 0.58 0.46 0.56

Clear 26-Apr-21 0.53 0.37 0.47

Clear 27-Apr-21 0.51 0.35 0.46

Clear 28-Apr-21 0.46 0.33 0.42

Cloudy 29-Apr-21 0.41 0.32 0.41

Clear 30-Apr-21 0.48 0.37 0.45

Clear 3-May-21 0.49 0.37 0.45

Clear 4-May-21 0.38 0.33 0.38

Clear 5-May-21 0.49 0.38 0.44

Clear 7-May-21 0.5 0.36 0.47

Cloudy 8-May-21 0.49 0.35 0.44

Clear 10-May-21 0.39 0.33 0.39

Clear 12-May-21 0.42 0.28 0.38

Clear 14-May-21 0.42 0.37 0.41

Cloudy 20-May-21 0.36 0.36 0.41

Cloudy 21-May-21 0.34 0.31 0.34

Cloudy 22-May-21 0.34 0.32 0.38

Clear 23-May-21 0.38 0.38 0.43

Total 12.84 9.98 12.22

Figure 3: Graph of total energy (kWh) generated by solar

panels.

4 CONCLUSIONS

The average electrical energy produced by two poly

crystalline 100 Wp solar panels arranged in series in

various weather is 0.46 kWh/day, two poly crystalline

100 Wp solar panels is 0.44 kWh/day and combined

mono-poly crystalline 200 Wp solar panels by 0.36

kWh/day. It can be concluded that the series circuit

two poly crystalline 100 Wp solar panels is able to

obtain maximum electrical energy in the on-grid

system by using a smart inverter compared to two 100

Wp mono crystalline and mono-poly crystalline 200

Wp solar panels.

ACKNOWLEDGEMENTS

This research was funded by DIPA of the Bali State

Polytechnic (PNB) No. SP.DIPA-023.18.2.677608 /

2021. We thank the Center for Research and

Community Service (P3M PNB) for providing the

kind of support.

Comparative Analysis of the Energy Supply of Poly and Mono Crystalline Solar Panels in the Rooftop on Grid

337

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