Photovoltaic systems are relatively “easy” to install, in that everything is designed to be assembled on site and no special tools are needed for cutting, welding or the like. Of course, you must have experience in electrical engineering, because working with direct current is quite dangerous if you are not careful. We always advise you to contact specialists, but even if you have experience, we are available for consultation to ensure that the system works properly!

The technical warranty of solar panels nowadays is generally 12 years or more, with some models reaching 30 years. The panel has two types of warranty – a technical warranty and a performance warranty. The second is always much longer than the first and is generally between 25 and 30 years, and it also indicates the percentage of the total power that the panel will retain for this period. The warranty of each panel is written in the description or in the offer that you will receive from us.

There is no way that the power of the electrical appliances you want to run can exceed that of the INVERTER when the system is operating in island mode.

This is very relative and depends a lot on the household’s consumption. However, our experience shows that most households will meet their electricity needs to a large extent with a system with a capacity of between 5 and 8 kWp, i.e. between 12 and 20 panels.

There is no way a three-phase inverter can work with a single-phase batch, but the opposite is possible, the inverter will simply power only one phase.

The difference is not as big as most people imagine. Yes, if the orientation is not exactly South, the yield will be affected, but in cases of up to 45 degrees of deviation, this would be within the range of no more than 5%.

We always rely on low-corrosion materials for the construction. The reason is that this is a system with a life of over 25 years and it is not wise to place it on a material that will be compromised after 10-15 years.

This is usually done using a Smart Meter or Smart Power Sensor, which measures the consumption in real time on site and transmits data to the inverter. Based on this data, the inverter regulates its production so that it is always slightly below the total consumption, so that there is no return to the grid. Every inverter manufacturer today has such a solution.

In order to calculate the rough annual production of each power, you need to take the following data:

North Bulgaria – 1250 hours
Central Bulgaria – 1300 hours
South Bulgaria – 1350 hours

These are the total annual hours that a system operates, taking into account cloudy days. That is, if you have a 30kWp system in Southern Bulgaria, you need to multiply 30 x 1350 and you will get 40,500 kWh on an annual basis. Of course, there are many factors that affect this production, but this is how you can make a rough calculation.

The preferential price up to 30kWp is determined every year, but it will remain the same for the entire term of the contract you sign. If, for example, in the period in which you sign the contract, the price is 0.18 leva excluding VAT per kilowatt, then it will remain that way until the end, even if the EWRC changes it next year.

The value of the investment in a grid-connected photovoltaic power plant (PPP) with a capacity of 30kW depends on a number of factors. It depends on the type of equipment, the location of the property, as well as the type of structure on which the panels will be installed. Equipment prices also often change depending on supply and demand at a given time. Currently, we offer design, supply of equipment, construction and commissioning of a 30kWp PV plant for a total cost of between BGN 36,000 and BGN 40,000 including VAT. The income from the investment depends mainly on the preferential price for which the relevant purchase agreement is concluded. The purchase price is determined by a decision of the KEWR every year on July 1. It is fixed for the term of the Purchase Agreement, but no longer than 31.12.2035. After this date, all photovoltaic power plants begin selling the generated electricity on the free electricity market. From 01-07-2024, the preferential price for purchasing energy from solar power plants with a capacity of up to 30 kilowatts inclusive is 163.95 BGN per MWh excluding VAT. By law, the ERPs are obliged to purchase the entire amount of energy produced by these solar power plants until the system reaches 1,406 hours of annual operation. A 30kW solar power plant in Bulgaria produces between 35 and 40 MWh per year, which is within the permissible production for purchase at a preferential price. 0.03 x 1,406=42.18 MWh This production generates between 6,500 and 7,000 BGN per year for the investor. These revenues vary on a monthly basis, depending on the season and the intensity of sunshine in a given month. The only costs for solar power plants are fees and taxes on these additional revenues. The system does not require any technical maintenance. Regular cleaning of solar panels is required to ensure maximum efficiency in their operation. On this page you can view a financial analysis of the investment in a 30kW system, with the validity of the preferential purchase price until 01.07.2023, and the validity of the equipment value is one week from the publication of this analysis (01.07.2024).

This is a matter of personal preference. It is not common practice to insure power plants, but of course there is always a risk of damage, especially from natural disasters.

Power plants still cannot be built on agricultural land without changing its purpose.

It is possible, but this will become clear at the “Request for Research” stage, so there is no way you can make the investment and then be rejected.