PV Self-Consumption Calculator

The power you need for a photovoltaic installation must be in accordance with your average consumption, which is usually lower than the contracted power. Over-sizing of the system of solar panels will lengthen the years of depreciation it will take to make it profitable. We also have to take into account other factors: orientation of the photovoltaic installation, shadows from buildings, trees, chimneys.

All the excess energy generated by your installation and not consumed will be fed into the electrical grid. The provider company will compensate you approximately between €0.04Kw and €0.06Kw. And all the produced and self-consumed energy, by not needing energy from the marketer, will be saving you between €0.12Kw and €0.16Kw. We must bear in mind that these savings are up to €0, we won't get monetary profit from it. This is why we advise you to set a system with the power we will consume during daylight hours.

Currently, batteries are expensive and do not have the same efficiency lifespan as the rest of the installation. As technology is constantly evolving, we recommend waiting for their prices to drop and their quality to increase.

The inverter converts the CC energy generated by the solar panels into AC energy used in our home. This inverter must have a power similar to the total power installed with the panels. We must also bear in mind if we plan to expand the amount of panels; we can have a more powerful inverter already prepared or install the new panels with microinverters.

Maintenance is very simple, so it is important that you take good care of your photovoltaic system. If dust or snow covers the panels, you can remove it with water or a brush, without using metal elements that could scratch and damage the panels' surface.

This type of system is an exterior alteration of the building and it is mandatory to request permission from your town hall. This procedure could take between 15 days and several months to be granted. Do not worry, we take care of all the necessary paperwork.

Currently in Spain, the grants depend on each Autonomous Community, but they usually have a limit on applications and they run out quickly. But there are also tax reductions in some districts that can reduce the installation cost of up to 50%.

Depending on the brand of solar panels, we find between 12 and 25 years manufacturing guarante. This type of warranty covers manufacturing defects and not other types of damage, so we always recommend contracting external insurance for the installation.

The price of a photovoltaic system installation depends on many factors, the amount and power of panels, the inverter power, manufacturers, structures, monitors, etc. Approximately the cost is usually around €2,500.

The savings you can achieve with a photovoltaic installation is between 40% and 80% of your monthly electricity bill.