A power plant with the right capacity will guarantee efficient power generation. On average, 1 kW produces 1000 kWh/year. E.g.: Your household consumes 7000 kWh per year, so you need a power plant of around 7 kW.

A solar power plant can be installed on both flat and pitched roofs.
The ideal pitch of a pitched roof is 30-40 degrees, facing south. The modules generate around 75% of their maximum capacity when tilted to the east or west.

The payback period for the solar power plant is 5-9 years (if you use APVA support). Payback depends on several factors: Costs of solar power equipment, roof type, angle of inclination and power consumption. The higher your electricity demand, the faster the payback of a solar power plant.

Once you have installed a solar power plant, you will need to connect it to the distribution grid managed by ESO. Once connected, you'll need to choose one of the payment plans offered by ESO.

The Environmental Project Management Agency (EPA) publishes calls for tenders several times a year. You can keep up-to-date with the latest information on grants on the APVA website.

Monocrystalline
Monocrystalline silicon modules are the most efficient solution if you have limited roof area. These modules have a higher efficiency and a smaller footprint thanks to a manufacturing process that builds the silicon grid one crystal at a time and creates a structure where electrons move more freely.
Polycrystalline
Polycrystalline modules are cheaper and less efficient than monocrystalline modules. In the production of this type of module, silicon fragments are fused together to form a grid. Due to the lower performance of polycrystalline modules, a larger roof area is required than for the choice of monocrystalline modules.

All these elements allow you to use the energy of the Sun, but they have different functions.
Solar modules are a key part of the solar power plant. They generate electricity and are installed on the roof of the building.
Solar collectors are not part of the solar power plant. It is a device that uses solar energy to heat water in buildings. They are often used for heating rooms with hot water.
Solar cells are one of the electrical components of the solar system. However, this is not the main element and is quite rarely used. As the name suggests, the batteries are designed to accumulate and subsequently use the surplus electricity generated by the solar power plant.

Ground-mounted
Ground-mounted power plants are the perfect solution when the roof of the building is unsuitable for the installation of additional structures. Ground-mounted solar module structures are low-impact and easy to maintain.

Integrated into the roof
You can choose a solar power plant that serves in place of a conventional roof covering. It is a safe solution designed to guarantee aesthetic use of roof space and energy generation efficiency.

On the roof covering
Solar power plants mounted on a pitched roof are the most popular choice for homeowners. We will tailor the layout of the solar modules to your roof to ensure maximum efficiency.

On a flat roof
A flat roof is also ideal for a solar power plant. We will install structures on the roof to ensure the optimal tilt angle and efficiency of the solar modules.
Façade
A solar power plant integrated into the façade is a modern way to generate renewable energy while protecting the building from rain, snow and wind. A facade or other architectural elements covered by solar panels will no longer need to be repainted or otherwise maintained.

The more sunlight a house receives, the more suitable it is for generating solar energy. It is important that the house is not in a dark, shady location (for example, in a forest or among tall, dense trees or buildings) and has a roof slope facing south or east-west.

On a cloudy day, a solar power plant produces less electricity, but if there is any light, it still produces power. In the long term, the amount of electricity generated each day evens out and the efficiency losses on cloudy days are compensated by sunny days.

Although solar power plants produce less energy in winter due to shorter days, having a solar power plant in winter time will help to recover the amount of electricity supplied and stored in ESO networks during the su mmer time, paying only the cost of the service of using the networks (“storage”).

The only periodic maintenance required is checking that the solar modules are clean, free of dust and pollen, and not covered with leaves or snow. In our experience, maintenance is very rarely necessary, as the modules themselves are well protected by rain when the tilt of the modules is greater than 10 degrees to the plane. If the installation is in good order, you will not incur any additional maintenance costs during the warranty period. The module's glass is made in such a way that it won't be damaged by hailstorms, making it durable.

Experts take into account the amount of energy consumed, the amount of shadow cast by objects and the roof area of the building to determine which solar power plant could be the most efficient and fit. For a pitched roof, it is estimated that 1 kW requires up to 5.2 sq m. If the roof is flat, the area increases – 1 kW requires between 7 and 10 sq m. Special devices help to reduce the influence of shadows. With the constant development of technology, the efficiency of solar modules is also increasing, so that the number of solar cells required for the same power is decreasing.

It is not possible to have two solar power plants on the same site, i.e. a solar power plant and a solar park. Since there is only one meter in the facility that reads the electricity produced and consumed by the facility, it is not possible to record production data from multiple sources at one point.

We estimate that the solar power plant pays off in about 6-7 years with the support of the state.
More information on the planned compensation for the purchase of a power plant from the solar park can be found on the page apva.lt.