Renewable Energy Installer May/June 17 | Page 34

Knowledge: Energy Storage Knowledge: Energy Storage Battery storage trial aims to boost number of solar homes in Barnsley Moixa, Northern Powergrid and Energise Barnsley have teamed up in a ground- breaking trial to demonstrate how clusters of home batteries can increase capacity on the electricity network and enable more homes to install solar panels. Moixa Smart Batteries will be installed in 40 homes and linked in a virtual power plant in the first project to study how this solution can reduce peak solar output onto the electricity networks when there is low local demand and save customers millions in the cost of running the UK’s power network. Electricity distributor Northern Powergrid, is funding installation of the batteries in Oxspring, near Barnsley, in properties owned by Barnsley Council and managed by Berneslai Homes. Community energy company Energise Barnsley has rolled out solar to homes in the area but came up against some network constraints in the village which meant that five houses could not be connected within the timescales of the project. The trial will include all 30 homes in the housing estate with solar PV panels plus 10 others without. Simon Daniel, CEO of Moixa, said: “Batteries will allow the electricity system to support much higher levels of low- carbon renewable power and increase UK energy independence. By managing clusters of home batteries in a virtual power plant and allowing homeowners to use more of their solar energy, thereby exporting less, we believe we can significantly reduce peak solar generation output onto the network. This will allow more homes to go solar without imposing new costs on network operators. “Solar homes with batteries can halve their electricity bills, and this solution will become increasingly popular as costs of storage and PV fall. We are working closely with Northern Powergrid and this project will deliver insights to develop incentives which we hope will allow us to roll out solar plus storage to tens of thousands of homes in their region, by creating a 34 | www.renewableenergyinstaller.co.uk Above: The Moixa home battery business case for homeowners to invest and also by increasing the number of solar connections allowed on each substation.” The £250,000 trial will seek to demonstrate that the virtual power plant can reduce peak solar output onto the network sufficiently to enable panels to be installed on more homes using existing substations and cable networks. If successful, Northern Powergrid believes UK network operators could save millions for customers by reducing the need to upgrade infrastructure, which will help ensure network-related charges on customers’ electricity bills remain good value. The trial will also feed into national design guidance for low voltage networks supplying housing estates. The first batteries were installed at the end of January and will cost residents nothing. Solar panels typically cut electricity bills by up to 30 per cent and batteries can add further savings of up to 20 per cent by allowing residents to use free energy generated during the day at night. Moixa will manage the cluster of batteries to reduce peak generation output onto Northern Powergrid’s local electricity network by storing solar electricity instead of exporting it to the grid. Its software includes ‘learning algorithms’ which respond to solar generation, electricity network needs and each user’s behaviour to maximise the benefits of storage. By linking the batteries in a virtual power plant Moixa will also be able to provide services that make the wider electricity grid more efficient, greener and cheaper to run, such as maintaining a stable frequenc