Does solar PV pay off?
“Yes. The simple payback is in 2011 of 10-15 years (in a danish context). And a plant lasts 25 years. “
An important element in the economy is the so-called net metering arrangement – where the electricity meter runs backwards when the solar cells produce more electricity than consumed.
In practice this means that you get the same electricity price as you pay approx. 2 kr per kwh.
However, there are a lot of homes who do not have good conditions for placing solar PV – there has been voiced a desire on Samsø to join together in common photovoltaic installations.
Common photovoltaic installations
It is possible within the danish legislation to establish common photovoltaic installations on these conditions:
- The properties must be joined directly to the common PV plant with a physical electric mini grid
- The effect may not exceed 6kW/dwelling
- Net consumption and net production must be measured
- There must be meters in each dwelling
If an entire village wants to establish solar or wind energy on the “commons” – every house must have a cable connected directly to the plant.
One solution is hardly possible in practice.
The legislation will have to be changed. Until then it is more realistic with smaller systems where 4-5 dwellings are joining in a common energy production unit.
Who will be the first on Samsø with the first common photovoltaic installation?