Many times we have heard people who have installed a standalone system complain that they have spent money and their system does not cover them or keeps having problems.

This is true when a system is not properly designed and dimensioned from the beginning or when the equipment selected or suggested by the installer does not meet the customer's needs either out of ignorance or deliberately to reduce the customer's cost and even worse to increase his profit installer or seller.

Unfortunately, the multitude of online shops that deal with autonomous photovoltaics promote poor quality Chinese equipment that not only do not meet basic specifications but often deceive with their technical characteristics.

By choosing branded products we ensure proper operation during the lifetime of the machines and we are sure that the money we will allocate corresponds to the quality promised by the manufacturer.

We only choose branded products from well-known manufacturers with proper technical coverage and from factories that have been in their industry for many decades.

In the area of autonomous systems, the rule "What you pay for, you get" applies 100%!!!

We can start with a smaller system when the cost is high to set up the larger system from scratch where ideally we would like and gradually expand it to reach the desired result.

In any case, the technical consultant we chose to guide us is responsible for not making mistakes that cost money.

Do not hesitate to call the technical team of Solar-shop.gr to dimension your system together.

First of all, what we need to know is the final desired size of the system to know where we want to reach.

As far as photovoltaics and charge controllers are concerned there is no problem as during expansion we can easily add additional panels with their own controller to the existing batteries.

The problem of expansion is mainly focused on the converter (inverter) which must either be chosen from the beginning of a higher power model or ideally choose a converter with the possibility of parallelization.

As far as batteries are concerned, in most cases we can add to increase the capacity of our warehouse, but we must consult our technician so that the expansion does not end up being unprofitable.

Under no circumstances do we place different batteries together either in type or capacity.

As a rule, open-type batteries are the best solution in terms of price-quality, they have a longer life and can give us more charge-discharge cycles.

Their "disadvantage" is that they need a relative maintenance and require our control periodically and more often in the summer months.

Closed-type batteries are mainly recommended either for smaller systems or for installation points where the equipment is in direct contact with humans, such as small one-room houses where the equipment is in the same space as the bed or the kitchen. In these cases open type batteries are not recommended due to fumes.

When choosing batteries, pay attention to both the company that manufactures them and their technical characteristics. (look up the manufacturer to see if it's a big factory or a no name product that someone baptized with a fancy name)

In small systems, even if the wind potential is good enough to support it, you do not recommend a wind turbine because we can get the energy we need, even in the winter months, more economically by adding a few more panels to our system.

In larger systems with large consumptions during the winter months or during the night we can add a wind turbine to cover our needs.

We must always bear in mind that a wind turbine is a mobile mechanism and needs maintenance, while photovoltaics do not need more than cleaning with simple water.

The second thing to be aware of is that most small and economical wind turbines brake with a short circuit in order not to exceed their endurance limit, with the result that in prolonged strong gusts of wind the power of the short circuit "breaks" and they burn.

Only the largest and most expensive wind turbines with serious construction have mechanical brakes and are not at risk from high wind speeds.

As a rule, in small systems with 1-2 panels we work at 12 Volt battery voltage as we respectively need 1-2 12 volt batteries to cover us.

When we want to install a larger system or when we intend to expand the system in the future, we choose to set it to 24 Volt.

For very large systems and for reasons of proper current management as well as saving money during expansion, it is preferable to work at 48 Volts.

Having basic knowledge of electrical engineering, someone with the appropriate guidance can do the installation by himself after first consulting an experienced technician on the choice of his equipment, as well as the points to pay attention to when connecting the equipment.

Nevertheless the voltages and currents in a photovoltaic system are large and guarantee risks both for the destruction of the equipment with a wrong connection and against the physical integrity of the person involved with the equipment.

In any case, it is recommended to entrust the installation of the equipment to an experienced installer with knowledge in the field of autonomous systems.

In order to correctly dimension a system, we need to know the daily consumption in Kwh, the use of the system within 24 hours, the sunshine of the area where the installation will take place and the instantaneous power W of the devices that will be connected.

Inside Solar-shop.gr you will find the special form we made for you that will help you to easily calculate all the requirements and choose the right equipment so that you don't spend money unnecessarily and that the equipment meets your needs.

Having chosen branded equipment you take advantage of the solvency of the manufacturers' warranty and their distribution and support network.

Low-quality products from individual imports do not offer a proper warranty and often not even technical support from their own importers.

At Solar-shop.gr we are always at your disposal to help with any problem that may arise and we are happy to provide you with any technical information you need both during the product selection stage and after the sale, as we do in our physical store Atomon – techmology year now building trusting relationships with our customers.