My Lords, I have a small amendment in this group—Amendment 68—which deals with electricity storage. This very comprehensive Bill looks a bit different from the one that we first saw, and I am not absolutely confident that I have inwardly absorbed the implication of every government amendment that we have had in the last few months. But I am pretty sure that one dimension of investment in the system that has not been fully spelled out is that of electricity storage.
We have obviously dealt with it as a way of subsidising and encouraging investment in generation and there are big changes which are welcome, by and large, in relation to carbon capture and storage, and slightly more controversial in relation to hydrogen. But one of the key things about the new system—which will be much more decentralised than previously and dependent on different forms of generated electricity—is that we need some real investment in electricity storage. We need it partly because those who have always opposed some renewables stress that they are variable and there is occasional intermittence. That will happen, but investment in pipes, pylons and wires may not be sufficient to avoid some faults and breakdowns in the system.
We need to be able to call on electricity which is stored in some form to ensure that supplies are continuous. I am not sure why this has not appeared in the strategy. It needs to be somewhere. I attended part of a seminar over at the Institution of Mechanical Engineers a few weeks ago which explained the different technologies that exist for electricity storage. There are obviously some old-fashioned ones such as hydroelectric power, where you keep the water back, but there are many new technologies that could be developed for a significant investment in electricity storage. The common assumption is that it will be batteries in some form or another, but batteries in themselves raise considerable problems. In particular, a significant installation would involve problems of maintenance and of the critical materials needed for large-scale battery storage.
There is the possibility of storage in hydrogen—and that may raise other problems with hydrogen—and there is storage in ammonia and storage in compressed air. Any of these technologies need to be pursued, but we do need some system of storage. The least I would hope for from the Minister today is an acceptance that part of the strategy will be to ensure that we have cutting-edge technology in electricity storage, and an indication of how that will be financed, what the government incentives are and what the regulatory structure will be. If the Government can give me that general assurance, I will be happy.