Photovoltaic systems are relatively “easy” to install, in the sense that everything is intended to be assembled on site and no special tools for cutting, welding. It is a must, that you have experience in electrical engineering, because working with direct current is quite dangerous if you are not careful. We advise you to always turn to specialists, but even if you have experience, we are available for consultation to make the system work properly!
The mass technical warranty on solar panels these days is 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 the percentage of the total power that the panel will retain for this period is also indicated there. The warranty of each panel is written in the description or in the offer you will receive from us.
There is no way that the power of the electrical appliances you want to run should exceed that of the INVERTER when the system is operating in island mode.
This depends a lot on household consumption. However, our experience shows that most households will meet their electricity needs to a large extent with a system of between 5 and 8 kWp, that is 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, it’s just that the inverter will only feed 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 up to 45 degrees deviation then this would be within 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 material that in 10-15 years will be compromised.
This usually happens by means of a Smart Meter or Smart Power Sensor, which measures in real time the consumption in the object and transmits data to the inverter. The inverter, on the basis of this data, adjusts its production so that it is always slightly below the total consumption, in order not to get a return to the grid. Every inverter manufacturer nowadays has such a solution.
In order to be able to estimate each power roughly the annual production, you need to take the following data:
– Northern Bulgaria – 1250 hours
– Middle Bulgaria – 1300 hours
– Southern 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. Naturally, there are many factors that influence this production, but this is how you can make a rough estimate.
The preferential price up to 30kWp is determined every year, but it will remain the same for the entire term of the contract you include. If, in the period in which you conclude the contract, the price is, for example, BGN 0.18 without VAT per kilowatt, it will remain so until the end, even if KEVR changes it next year.
It’s a matter of personal preference. It is not a common practice to insure plants, but of course there is always a risk of damage, especially from natural disasters.
Power plants cannot yet be built on agricultural land without changing its purpose.
It’s possible, but it will be clear at the Research Request stage, so you can’t make the investment and then get turned down.
