Hermes Solar

Types of PV systems

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Choosing the right PV system for home or business is a complex task, which can be influenced by many factors. To be able to fully benefit from all the advantages of PV system and if you want this system to respond adequately and fully to all your individual needs and ideas and to become a reasonable and worthy investment, then it is essential that the processes of planning, design and installation of the system to be accurately and professionally implemanted.

Hermes Solar Ltd. has an expert team of professionals: engineers, PV designers and technicians with a solid and diverse experience, and many world-renowned partners in the field of photovoltaics and renewable energy.

Thanks to this we can provide you with professional advice and consulting when choosing the right PV system for your home or business and to carry out or assist you at all the stages of its planning, design and installation.

On-grid systems are the most common type of solar PV system for a home or industry. They are connected to the electrical grid, and allow the alternative and practically simultaneous use of solar energy as well as electricity from the grid. This type of systems do not need to produce 100% of the electricty demand for a home or business.

As we know electricity has to be spent in real time. However, the over-generated energy can be temporarily stored as other forms of energy (e.g. chemical energy) in batteries, as this usually requires a solid money investment and typically comes with significant electricity losses.

There is also PV systems that is fully independent of the electrical grid. This is the so called off-grid PV system, which requires that the solar panels are able to produce enough electricity to cover 100% of the energy needs. Most homes for example have higher electricity demand in the evening or at night, so off-grid systems usually incorporate either a battery (to store energy produced during the day) or backup source of energy (like a generator), or both. Off-grid systems are more complex and less flexible than on-grid ones as well they are more expensive concerning the building, service and maintenance.

Hybrid photovoltaic systems (Hybrid PV systems), as shown by their very name take the best of both other types of systems – on-grid and off-grid PV systems.

In fact, the hybrid system can be consider as an on-grid system upgraded to include a battery backup: a bank of deep-cycle batteries, which can be charged by both the utility grid and the solar panels. Thus, in the event of an outage, the backup battery can be switched on to provide backup power to the building and in case of failure in the operation of the photovoltaic system, the utility grid can be used for an alternative power supply till the problem is solved.

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