Solar Panel Installation
in Milton Keynes

Milton Keynes is the one place on our map where the distribution network operator is not UK Power Networks. The city is served by National Grid Electricity Distribution, the network formerly trading as Western Power Distribution, whose East Midlands area reaches down to Milton Keynes; the council's own planning correspondence names Western Power Distribution as the electricity distributor for the authority. The practical consequence is procedural rather than technical: the G98 notification or G99 application goes to a different operator, with its own forms, portal and timescales, so a programme copied from a Hertfordshire job will point at the wrong place. Addresses close to the Bedfordshire and Buckinghamshire network edges are worth checking individually, because the parts of Buckinghamshire and most of Bedfordshire sat historically with UKPN's predecessor.

For a city of 287,060 people at the 2021 census — which grew 15.4% over the preceding decade against 6.6% for England, and which took city status in 2022 — Milton Keynes has a remarkably light conservation-area planning regime. The council lists just two conservation-area Article 4 directions. Olney's covers all dwellinghouses in the conservation area for extensions or alterations, the erection of porches and the painting of exterior walls. Wolverton's is narrower in subject but specific about position: extensions or alterations to elevations fronting a road, expressly including side elevations on corner properties and painting, plus the creation of hard surfaces to the front, the removal and replacement of walls, and the installation of satellite dishes to the front. Neither mentions solar panels or photovoltaics anywhere.

The council's other Article 4 directions are worth knowing about only so they can be ruled out of a solar conversation. Two cover the change of use of a dwellinghouse to a house in multiple occupation — the first in effect from 30 December 2010 and made permanent on 28 June 2011, covering the borough except the Hanslope and Olney wards and the former Sherington and Danesborough wards, the second from 23 December 2011 covering the whole borough. One covers the change of use of offices to dwellings in the Central Milton Keynes Business District, in effect from 2 July 2021 and revised from 8 October 2022, bounded by Portway, Saxon Gate, Childs Way and the West Coast Railway. A further series applies to specific parcels of land, including sites at Lavendon, Watling Street between Bletchley and Little Brickhill, Weston Road and High Street in Olney, Sherington, Castlethorpe, Bow Brickhill, Weston Underwood, Stoke Goldington and Castle Meadow at Newport Pagnell. None of them is about roof-mounted generation.

On yield, the European Commission's PVGIS model run for the city centre at latitude 52.0406, longitude -0.7594, using the PVGIS-SARAH3 radiation database with a 35-degree pitch and 14% system losses, returns about 1,016 kWh a year per kWp facing due south, about 809 kWh facing east and about 794 kWh facing west. East and west therefore land at roughly 80% and 78% of south, which is usually enough to make a split east-west array worth pricing rather than dismissing. The seasonal spread is the figure that should drive battery sizing: about 124 kWh per kWp in July against about 35 kWh in December, a better than threefold swing. PVGIS models terrain but not trees or neighbouring buildings, so site shading still has to be assessed in person.

The city's building stock splits the commercial conversation in two. The warehouse and distribution sheds that cluster around the grid roads routinely offer roof areas that pass the G98 threshold comfortably and can exceed 50 kWp, at which point the installation leaves MCS scheme scope altogether — that is a design decision with consequences for certification and for the Smart Export Guarantee, not a detail. The older terraced stock in Wolverton and Bletchley is a different proposition, closer to the Victorian roofs we work on in Hertfordshire, where the rear slope carries the array and the frontage is the question to settle first.