Photovoltaic Systems
A feasibility study is used to settle on whether or not a solar panel installation is both equally economical and buildable
. In order to identify this, the study uses a three step method. This technique involves deciding the smallest required photovoltaic system, calculating the costs of the system, and comparing the final results to potential alternatives. It is very important know how these three steps work together to become aware of how the study actually reaches its final result. It is also important to be aware that the following is a generic introduction to a feasibility study and the true particulars will vary between different companies.
1 - Estimating the Minimum Necessary Size of the Photovoltaic System
In order to choose between available photovoltaic systems, four pieces of information should be put together. They are the load, available sunshine, size of the PV system, and ideal battery bank size.
The most popular technique for determining the load is referred to as the bottom up approach. To accomplish this for a business, all of the individual loads used in an average day must be combined. In order to ensure that the PV system supplies ample power, it is helpful to add a little extra to the total, which often can make up for inefficiencies. For businesses that are already in operation, using the monthly electricity bill is generally the most straightforward solution.
Insolation value, which is the average level of sunlight available to PV panels on an average day in the worst month of the year, is utilized to figure out the volume of
sunlight available. Familiarity with the insolation value will ensure that the organizations know that their photovoltaic systems will be able to supply enough energy all year round.
Dividing the daily energy requirement by the amount of sun-hours per day, it is possible to figure out how big a PV system needs to be. Generally, systems connected to the grid will furnish between 10% and 70% of the total energy required with the utility grid picking up the remainder.
The last part of the equation will involve deciding on the battery bank size. Usually, if a battery only discharges
between 20-30% of their power each day, they will likely last a lot longer. Hence, a battery should have the capacity to hold somewhere around 4 to 5 times the daily load requirement. Along with increasing the life span of the battery, this ensures that there is sufficient energy to cover the days that the PV system does not obtain the volume of sunshine expected.
2 - Estimating The Buying Price Of Photovoltaic Systems
There are several parts that will be involved in this calculation. The first is the actual cost of the PV system. The best way to do this is through breaking down how many PV modules will be needed and multiplying it by the typical retail cost per module. The next factor is the cost of the battery bank. Another part is the inverter expense. Most PV systems will have to have an inverter to generate AC power. Finally, add the system cost. The system cost includes miscellaneous items such as wires, fuses, switches, etc. The majority of studies work with a factor of 20% to ascertain this.
3 - Examining Alternate Options
As with every important business decision, alternatives ought to be taken into consideration. Once a business has the final approximated cost of their photovoltaic systems, they can compare it to other power options. Several of the most popular power options include diesel generators, biodiesel, and hybrid wind-solar systems.
After this step has been finished, the feasibility study should be able to clearly specify which of the choices will need the largest upfront cost. In combination with other estimates, this study will assist to make the smartest cost-effective long-term decision.
by: Gary Mandela
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