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Installing a 10kW photovoltaic system can prove to be an excellent investment, which will reduce your electricity bills and allow you to generate clean energy. Let’s first take a look at the key components of the system and the cost breakdown.
Solar panels – For a 10kW installation, you’ll need around 25-30 panels, depending on the capacity of each panel (usually between 330-400W). The price per panel varies, but on average, you can expect a cost of between 180 and 300 BGN per panel, so the total for the panels will be roughly 4500 – 9000 BGN.
Inverter – The inverter converts the direct current (DC) energy from the panels into alternating current (AC), which you can use at home. The price for a 10kW inverter is around 3000 – 5000 BGN, depending on the brand and efficiency.
Mounting system – This includes everything needed to hold the panels in place (brackets, rails, etc.). The cost depends on the type of installation (roof or ground) and is approximately 1500 – 3000 BGN.
Cables and accessories – All the necessary cables, connectors, and electrical components generally amount to 500 – 1000 BGN.
Installation and labour – This depends on the complexity of the installation, but you can expect to pay between 3000 and 6000 BGN for professional installation.
In total, the costs can range between 12,500 and 24,000 BGN, depending on the components you choose and the complexity of the installation.
Where to install the system – on the roof or in the yard?
If you have enough space on your roof, this can be the most convenient option. Roof installations often make use of existing space, eliminating the need to sacrifice yard area. This is particularly beneficial if you have a small yard or if you use it for other purposes, such as a garden or relaxation area. Additionally, if your roof faces south, it will help maximise solar energy capture. However, an important factor to consider is the condition of the roof—if it is old or damaged, you may need to invest in repairs before installing the solar system.
On the other hand, if you have a spacious yard, you might consider placing the photovoltaics there. This allows you to orient the panels at an optimal angle and avoid shading that may come from chimneys or other roof structures. The downside is that you will occupy part of the yard space, which could be a limitation if you have other plans for the garden. Additionally, ground-mounted systems are often more expensive to install due to the need for more stable foundations.
With a 10kW photovoltaic system, you can power a significant portion of the electricity needs of a standard home. This depends on several factors, such as your location (sunlight hours), seasonality, the energy efficiency of your household appliances, and your daily energy consumption. However, as a general rule, such a system can generate an average of around 35-50 kWh of electricity per day (depending on sunlight and the season).
Here’s what you can power with solar panels for a new home:
Essential household appliances:
- Refrigerator (around 1-2 kWh per day)
- Washing machine (around 0.5-2 kWh per cycle)
- Dishwasher (around 1.5-2 kWh per cycle)
- Television and computers (around 1-3 kWh per day)
- Air conditioner (around 2-4 kWh for a few hours of operation, depending on its power)
- Lighting and small appliances:
- LED lighting throughout the house (around 0.5-1 kWh per day)
- Small appliances like microwaves, toasters, chargers, and others (around 1-2 kWh per day)
- Electric water heater:
- A boiler with a capacity of 100-150 litres can consume around 3-5 kWh per day if it operates for several hours.
- Kitchen appliances:
- Ovens, electric hobs, and other high-energy appliances can use around 3-5 kWh for cooking per day.
- Cooling and heating:
- An efficient heating system or heat pump can consume around 4-6 kWh for a few hours of operation.
What does this mean?
Such a system can power nearly all standard household appliances and meet the basic needs of a family, including lighting, kitchen appliances, cooling, and heating. It’s important to note that in the summer, when there are more sunlight hours, you may experience an excess of energy, while in the winter, you might need to rely on grid energy or an additional source of electricity.
If the system is connected to energy storage batteries, you will have the option to use the generated energy at night or during poor weather, which will enhance the household’s independence.
