Our Solar Electric Future
Paul Hutchens is CEO of Midlands-based solar specialists, Eco2Solar, he is a board member of the Solar Trade Association (STA), the UK’s leading solar industry voice, and Chairman of the STA’s New Build Working Group which aims to inform governments, councils, house builders and consumers about sustainability in housing. Here, Paul discusses the quickening pace towards electrification of energy the UK, what this shift means for the grid, and how our electric future should ultimately benefit all consumers. As fossil fuel resources are depleted and demand for sustainable energies increase, we are looking to a future of total electrification of energy in homes, industry and transport. This is a world-wide movement, but specifically in the UK, is the National Grid prepared to meet this demand? Renewable energy solutions like solar serve a vital role in meeting future energy requirements, but are the systems currently in place able to monitor and react to the significant changes in demand expected? Shifts to electrification Shifts towards total electrification can be seen across buildings and transport, and this movement is gaining pace. Looking first at buildings – the Government’s Clean Growth Strategy released in 2017 recommends“phasing out the installation of high carbon fossil fuel heating in both domestic and non-domestic buildings off the gas grid during the 2020s, starting with new build.” In addition, following recommendations from the Climate Change Committee, there is widespread agreement that heating must be decarbonised in order to meet the UK’s 2050 carbon targets. In terms of transport, all eyes are on electric vehicles (EVs). In 2017, the Government pledged to ban production of new petrol and diesel car sales by 2040 and more recently there have been calls to bring that ban forward to 2032. Several large car manufacturers have announced that they will shortly stop production of vehicles powered solely by internal combustion engine. Volvo will stop next year and Jaguar Land Rover in 2020. Other major manufacturers plan to release high-profile electric models, including Volkswagen who haverecently announced plans to handle production of 50 million electric vehicles. Electrification of industry is following suit behind buildings and transport, but the pace of change is slower. However, for buildings and transport the not-so-distant future looks to be electric. Industry response to electrification In November 2018, the International Energy Agency reported that the world has no capacity to absorb new fossil fuel plants. We know that we cannot continue to rely on fossil fuels to generate the electricity required for industry, transport and buildings. This year, electricity generation from coal decreased by 47 per cent from June to August, compared to the same period in 2017, representing just 1.2 per cent of total MPP supply. The gap left needed to be filled by a significant increase in energy production from renewable sources. Indeed, September this year saw a major milestone in the UK power market as for the first time there was more renewables capacity on the grid than fossil fuels. The challenge for the National Grid is how it will balance these different energy sources in order to maintain consistency in supply. The six large energy companies dominating the market are having to show unprecedented agility and flexibility in reacting to changes in sources of energy. At the same time, these companies are being challenged by the emergence of more nimble, small power generators, which can immediately smooth supply of energy supply. These small generators, often positioned in sites that experience power shortages are presenting ‘two-way’ power systems where low carbon energy such as solar are complemented by energy sources like batteries and small, local power stations. These ‘pop-ups’ are increasingly valuable at times of peak demand, especially as we experience more phases of extreme weather. The energy gap? To date, the Office of National Statistics (ONS) reports that demand for electricity has been pretty constant. In the 25 October report detailing availability and consumption of electricity, ONS notes “Overall for the three-month period to August 2018, consumption in the industrial sector increased by 0.8 per cent compared to the same period in 2017. Consumption by other final users had a 0.1 per cent increase on the previous year.” In 1997, total consumption of energy in the UK was 321TWh. Twenty years on, in 2017 we consumed just 308TWh. There are many reasons for this including the improved energy efficiency of electrical products, systems and processes. However, this is set to change. In 2017, the National Grid warned that by 2030, electric cars could require 3.5-8GW of additional capacity, on top of the current peak demand of 60GW.Another estimate suggests that if one in three cars sold in 2035 is electric, the charging of vehicles would account for 3% of the UK’s total electricity demand. The power generation available at present simply won’t meet this increase in demand. Short power outages for homes are disruptive, but nothing compared to the damage that can be done in industry. Pressures on the grid can result in so called ‘brown-outs’: drops in voltage in an electrical power supply system. If this happens in manufacturing plants the results can be devastating, resulting in six figure damages. More and more big businesses are looking for back-ups to their supply. So, what can we do to protect consistency in supply? One answer is likely to be battery storage and smart technology. Solar, smart technology and storage We believe batteries are going to be a big shock absorber for the changes in demand expected across bothdomestic and industry settings. An Energy Storage report from February 2018 states that “In megawatt-hours, battery energy storage capacities installed in the UK by the end of 2022 will be 50 times what they were as 2017 ended.” As well as solar panels, Eco2Solar install EV charging points and battery storage in new houses. We are preparing for a significant increase in demand over the coming years as individuals and companies aim to be more self-reliant. It is still early days for home batteries, but costs are starting to come down. The space is starting to get interesting, as the big six energy companies race to make their mark in the consumer solar and storage market. Smart technology is key to getting the most out of these storage solutions. In homes, smart energy systems can balance the overall electricity load, using the ‘free’ electricity from the sun to run appliances at times when energy from the Grid is at its highest cost. The ability to store energy at peak times and use it at low peak willpresent cost benefits to consumers. Investment in out-of-home storage is soaring. Energy Storage News reports that currently, the largest battery project in the UK stand at 50 MW with Statera’s Pelham Storage project, due to be completed this December. The project, near Bishop’s Stortford in Hertfordshire, has the potential to provide enough power for over 13,000 average UK homes at any time. Drax have also announced plans to build a 200 MW battery storage project in North Yorkshire. The cost of decentralisation Taking energy demand out of the National Grid and localising it presents some interesting challenges to the utilities sector.
