After the energy crisis of 2022, the word "photovoltaic" is being mentioned more and more. The installation of photovoltaic systems has become the consensus of people towards green and sustainable development. But what exactly is photovoltaic and why can photovoltaic panels generate electricity? Can it really bring me benefits? How much does it cost to invest in PV, and is it worth it? Do I want to buy solar panels like others? I believe that you will make your own choice after reading this PV module purchasing know how manual!
This manual is divided into two parts, this is the second part.
What do I need to pay attention to when choosing solar panels?
There are several issues that should be taken into consideration when choosing PV panels. These include the wattage of the panels, the brands mentioned earlier, including products and services, and the service life, or the actual operating time of the PV panels. What you also need to keep in mind is the warranty, which usually covers several aspects, including the yield, which is usually guaranteed for 25 years.
When choosing solar panels, it is also important to keep in mind that installing a PV system involves maintenance at a later date. For example, many people will ask: Do PV panels need to be cleaned ? Yes, panels should be cleaned at least twice a year. Clean panels mean higher energy production.
This is a common concern. Many European countries have long winters, and snow accumulation reduces the transmission of solar radiation. It is therefore extremely important to be aware of all aspects of PV panel technology and subsequent use and maintenance when deciding to purchase solar panels.
The place where the PV panels are installed is also important. In most cases, it is the roof of the house. The key issue here is the orientation of the roof, and the angle at which parts of it are sloped.
One of the advantages of PV is its versatility, as it can be installed on most roofs, regardless of the type of covering or the angle of inclination mentioned earlier. PV plants can be installed even on flat roofs, as long as they are equipped with PV mounts. The best tilt angle for the installation requires a comprehensive professional calculation, and usually the higher the latitude, the higher the tilt angle of the PV panels.
The key issue is still the orientation of the roof. For European countries, the best roof is considered to be the south-facing direction. Installing to the east or west is also worth considering. As a rule of thumb, it is considered that PV panels should not be installed in a north-facing direction.
In addition, before deciding to install PV, it is worth noting whether the property has sufficient sunlight exposure. This sometimes happens when it is disturbed by neighboring buildings or tall trees.
How do I choose the capacity of the PV system to be installed?
The usual rule of thumb is that the installed capacity of a home should be such that the energy produced in a year does not exceed the annual consumption. This will balance the portion of energy that remains in the grid under the discount system and also help avoid excessive energy production relative to the household's needs.
As a guideline, you can estimate the installed capacity of a PV system yourself, based on your annual energy consumption. A 1kW PV system is generally considered to meet 1,000 kWh of electricity consumption per year.
What is the payback period for PV power?
Having reached the shore, it's time to answer one last nagging and perhaps critical question. So, what is the payback period for PV power?
A well-designed PV plant pays for itself in an average of 7-9 years. When a company makes an offer, it usually gives the consumer a simulated payback period. It is well known that the price of PV products will continue to fall, and if electricity prices continue to rise, the payback period for this investment will be reduced to 5-7 years.
Frequently Asked Questions
What is the cost of 1 kW of PV in 2023?
The cost of the system depends on various factors. Typically, in Europe, the cost of a 1 kW system is around €1200-1600.
Is it still profitable to establish PV?
Despite the constant changes and the increase in electricity prices, it is still worth considering and, most importantly, choosing photovoltaic power. It is still profitable.
Which system to choose on-grid, off-grid, or hybrid?
Each scenario should be considered separately. Grid-connected systems are cost effective for small PV installations. Off-grid installations are primarily for those who care about complete independence without looking at cost. Wanting to combine the two, a hybrid system can be a good solution.
After reading the guide, almost all of the PV secrets are discovered. Doesn't it sound great to have your own green energy in these times when electricity continues to be expensive?