Function of Ofgen has been to take away barriers to market entry and drive down prices. Free market and open pricing are designed specifically to reflect the character of constant energy generation where and when it is needed. On the distribution and transmission side, there are similar powers to drive down costs and promote competition. So placed specific obligations on energy suppliers to meet targets for renewables. Green certificates encourage generators to increase their RE capacity, but RE still cannot deliver to time and schedule as efficiently as coal-generated electricity.
Energy demands fluctuate greatly from winter to summer.
RE, with a slender share of the market cannot control those levels of peak and trough. It is entering a market in which there is over-capacity, with heavy exports south. We have low cost environmentally friendly existing generation and a competitive electricity market, into which a lot more RE will be introduced. But these areas do not correspond to where the existing electricity network is strong. Costs of improving the network are likely to be high.