The core components of a grid connect solar power system are the panels, inverter and mounting system. External to the system is the meter, which must also be compatible with the system.


Solar panels

Solar panels come in different wattages and sizes. As a rough guide, each solar panel is approximately 1, 7 meters long and 1 meter wide. A 3kW solar panel system requires around 24m2 of roof space and a 5kW solar panel system requires around 40m2.
 
There are 2 main types of solar cells used in solar modules: monocrystalline and polycrystalline. These are built up from silicon cells Ezek nagy tisztaságú szilícium cellákból épülnek fel, sorba kötve és vízmentesen egy üveglap és egy műanyag hátlap közé laminálva kerülnek gyártásra.

In everyday practice there are only a few minor differences between the two types of solar cells. In central Europe practically both types generate the same amount of power when comparing same performance panels.
Monocrystalline modules perform slightly better in hot climates, while in northern parts of continent the polycrystalline modules are better. Looking at their performance the mono cells have highly greater efficiency.

What influences the cost of solar panel?
The cost of solar panel varies greatly and determined in part by its output capacity (in watts) the physical size the brand the durability or longevity (or warranty period) and any certifications the solar panel might have. Choosing a solar panel on price alone is not wise, as it may not be suited to the area where you wish to install it, may not have the necessary certifications to quality for government incentives or provide the performance required to assist economic payback.


Inverter

Solar panels produce low voltage DC electricity. The inverter converts this into the AC electricity needed to supply power for standard appliances.

The efficiency of an inverter is measured by how well it converts the DC electricity into AC electricity. This usually ranges from 95% to 97,5% for most models. Inverters are sized according to the power (watts) they can supply.

Obviously, the more efficient the inverter the better - as less electricity will be wasted as heat during the conversion from DC to AC.

While the inverter efficiency claimed by a manufacturer may be high, in reality it may not be. The only way to be sure you are buying quality is if the inverter has real world examples of the performance of their equipment, validated by independent third party testing.

It is important to ensure that your grid connect inverter complies with Hungarian Standards. Ask an accredited installer to provide proof that an inverter meets Hungarian standards.


Mounting system

The mounting system is a crucial component of a solar array as it will be subjected to major environmental stresses, such as wind. Unfortunately, some suppliers skimp on this item. Ensure you ask about certification and warranty periods.
 

Cables and connectors

The use of substandard connectors and cables can significantly impact on system performance and to fire and electrocution risk. Cabling should be certified to PV1-F and solar connectors to EN 50521 standards.
 

Electricity meters

If you don’t have a solar capable meter, known as a bi-directional meter you will need to get one when you install a solar system.
 
If your meter hasn’t been updated in a while, it is most likely that you have a traditional accumulation meter (with a spinning disk) and will need to acquire a new meter.