How many solar panels do I need?

We are happy to help you calculate how many solar panels you need. By forwarding your energy bill to us, we can view your consumption from the past year and make you a quotation based on your consumption. We always recommend choosing a system designed for your usage. Despite the fact that you can return your unused energy, the payback time is the fastest if you use as much energy as possible and return as little as possible.

Can I calculate how many solar panels I need myself?

On your energy bill you can see how much electricity you use on average. Please note that part of this power is consumed at night and part during the day. Through a number of simple programmings (for example, running the pool pump during sunlight instead of at night), we can move part of the energy used at night to daytime.

When you know your average consumption during the day, you can calculate how many panels you need. You can also calculate this yourself using the following calculation. Note, this calculation gives you an average, which will be higher in the summer and lower in the winter.

10 solar panels of 400W = 4,000W (4kW)

4 kW x 0.8 (average efficiency factor Costa Blanca) = 3.2 kW

3.2 kW x 6 = approx.19.2 kWh per day (lower in winter, higher in summer)

19.2 kWh per day x 365 days = approx. 7000 kWh per year

You can also use your calculator

What type of solar panels are there?

Solar panels come in different shapes and sizes. The most common are polycrystalline and monocrystalline panels. Polycrystalline panels are usually blue, slightly cheaper and slightly less efficient than the usually black or dark purple monocrystalline panels. The quality differences between the two types are generally small.

At Solar Power Systems we work with monocrystalline solar panels. All our solar panels have a warranty of 12 years and a guaranteed power production of 25 years. All solar panels have an efficiency of approx. 20% or higher and depending on the available space, we opt for 60-cell or 72-cell panels. We constantly follow the markets in search of the best solar panels with the best price / quality / efficient ratio and exclusively from the better brands.

How are the solar panels installed?

Solar panels can be installed in different ways. They can be placed on sloping roofs, flat roofs, on terraces and in gardens. When placing the panels, we pay attention to the following:

What is the best slope?

The angle of inclination influences the yield. An angle of about 35 degrees is optimal, but the yield loss with slightly steeper or less steeper placement is small (less than 10%).

In which direction should the panels be placed?

Solar panels are best oriented to the south, but if the panels are oriented to the (south) east or (south) west, this can certainly still be profitable with a slightly lower yield of 5 to 15%.

And what if there is shade on the solar panels?

Solar panels naturally generate the most when they are completely in the sun. When there are shadows from, for example, a chimney, we recommend optimizers. Optimizers will ensure that shaded panels cannot affect those that are in full sunlight.

Do I have enough space?

When the panels are placed on sloping roofs, they are placed close together. When the panels are installed on flat roofs, on terraces or in gardens, there is a space between the panels so that the panels can never be in each-others shade.

How are the solar panels installed on roofs?

We work with rails for sloping tile roofs. We drill a hole in the roof tile with a diamond drill and drill through the roof tile and the “bardo” (red stones that are usually used under the tiles in Spain). Here we insert a threaded pin and then the hole is sealed around with a special adhesive. Rails are mounted on the pin and the panels are placed on these rails.

Do you inspect the house first?

We always come to view the situation before installation. In addition to the available space, we check your power connection and fuse box. To calculate the available space, we use google maps, physical measurements or drones.

What if I want them on a flat roof, terrace or in my garden?

When the panels are placed on a flat surface, we work with adjustable precast concrete foundations.