Energy matters

Renewable energy is energy generated from natural resources — such as sunlight, wind, rain, tides and geothermal heat — which are renewable (naturally replenished). Renewable sources include solar, wind, hydro, biomass and biofuels.

There are several ways to use solar energy, but basically we can use the sun to heat water or to produce electricity. Due to these different kinds to use solar energy, we can find several types of solar panels: for Solar Heating or Solar Power respectivelly.

As the sun rises from East and sets at West, the best position -azimut- to put solar panels is in the South (0º) allowing variations from -45º to +45º . If there is some variation of the orientation to the East the installation will produce more at the beginning of the day, by other hand, a deviation to the West will produce more at the end of the day.

The best inclination depends on the latitude of the place and usually we use same degrees of the latitude +-10º if we want to optimize the solar plant for winter or summer and respecting the tilt limit from 10º to 60º.

Why Solar Power?

The sun is shining and everybody is happy. Unfortunately, the sun might not shine one day. However, with the solar panels installed on your roof, your house will still save money on electricity, so you will be always happy.

On the contrary of what many people think, to save money with the solar panels, the sun does not need to shine on a blue, clean sky. The system produces power the whole year, though it produces more during the day and during the summer. With a grid connected, you can use the central electricity system as a kind of “bank”. This means that an overproduction of electricity produced during the summer can be used during the winter.

Solar Panels are an excellent investment

Solar panels are soundproof and requires close to no maintenance. It is a very long term investment given that it will take up to 25 years before you have to do major maintenance in your solar panel system. Ask us for an economic report of a PV installation.

New rules in Denmark: Small solar power is still worthwhile

In general, small photovoltaic been tremendously popular in the Danish market, either for commercial or private. With net meter scheme with the old rules allowed annualized net settlement, it was best to put a solar power up, which would cover the annual household consumption. It could use power when you needed it, which means the evening / night, without worrying about additional costs or fees / charges.

With the shift from annual basis to hourly billing means that solar adjusted household consumption now will pay about 75-85% of the electricity produced on the grid, and sell it for 1,30 kr. Not any positive price when the 75 -85% selling power later be bought back when the need for it and it market price plus taxes, currently around 2,20 kr.

Why small plants?

The key to a good equation with a solar cell under the new rules is that you can use most of the flow. It is almost impossible with a 6 kW system, but with a 3 kW, or maybe even just a 2 kW solar PV, it suddenly becomes possible to reverse consumption and sales. If you can consume 75% or more of its generated power, as the economy begins in the plant suddenly look better. With a real saving of 2.20 per. kWh, will be able to repay the facility within a foreseeable period. There are also several advantages the smaller units:

Requires less roof space

The number of square meters on the roof is often a limiting factor, and can result in a facility that can not satisfy your needs, as it does not cover your current or expected electricity consumption. With a small plant it is of course much easier to find space for, and not only that, it also becomes easier to make a neat and aesthetically pleasing installations not fill the entire roof.

Easier to locate and mount

16 panels is of course much easier to mount than 24 or 30 panels. This makes it faster and / or cheaper to perform assembly work, and you need less mounting hardware. It also becomes easier to place it at the point on the roof where there is at least shade, so that there are individual panels, or even the whole strands which fall in the shade during the course of the day.

Less investment

The total investment is significantly smaller to begin with; fewer solar cells, small inverter, fewer working hours, less mounting gear. All of this contributes to making it a more affordable investment - eg. 75,000 instead of 120,000.

The payback time

It is not particularly easy to calculate how long it will take before the solar system is paid in full. The problem is specifically, how much of the electricity produced by the manufacturer can use. DEA report presented 40% own consumption as an appropriate part when there was a plant adapted household's annual consumption. It later proved to be a laughable inaccurate representation of the truth which does not hold water. It is closer to half, 20%, one can expect an ordinary household use of production, which is significant for our consumption patterns; summer produce solar cells much and we spend a little. In winter, they produce little, and we use a lot.

Even with 40% own consumption, so the payback time will still not be near what it was in the old system. A facility with annualized net settlement was paid back in 5-6 years, will now be repaid in 10-12 years. Here we talk optimum location, good roof, 100% financed by own funds and no ugly shadows across the solar cells. With the more realistic 20% own consumption, we are approaching payback times of 14-15 years. With a less than perfect location and facility wholly or partly lånfinansieret, so when we around 17-18 years before the plant is paid back.

A small installations potentially high domestic consumption means that you can achieve payback times about 10 years, maybe even less than 10 years, depending on how electricity prices will develop.

Click here to see the Resolution nr 1068 of 16/11/2012 

Good Conscience

While you are lying on your sofa, you can think about this information. For every 10 m2 of solar panel you have invested on, you save about half a ton of CO2 per year. This can put a smile on everybody’s face, even in a rainy day.


Advantages of the Photovoltaic system:

  • Environmental friendly - energy from PV system does not release any form of CO2
  • Increases value - solar panels increase the value of your residence
  • Environental commitment - you help the environment by not using forms of energy that release CO2 on the atmosphere
  • Better energy production for your house
  • Long service life - minimum of 25 years
  • No maintance costs

If you produce more energy that it is consumed, the Electricity company has to buy the exceeding production (in Denmark. Maybe rules are different in your country)

Consultancy and design

Soleai offers consultancy services to discover the benefits how to use renewable energy in your house or business.

We can project a saving energy plan to reduce your energy bill. Feel free to contact us and we will do the rest.

Our technical department are high-qualified and we use the most advanced software tools to realize simulations, always customized for your needs.