Dominus Property Developments Ltd Capacity Level Reduction for Saxon Apartments
£2,300+ Per Year Saved by Adjusting Electricity Capacity to Demand
Client Overview
Saxon Apartments is a residential block in Archway, North London. The communal areas are supplied by one advanced Half-Hourly (HH) electricity meter under a landlord supply arrangement.
The Challenge
Following Ofgem’s Targeted Charging Review (TCR), the site faced sharply higher pass-through Distribution Use of System (DUoS) and Transmission Network Use of System (TNUoS) charges for its HH supply. These charges appeared both as separate line items and within the standing charge of energy bills. They were unavoidable unless the contracted capacity level was amended.
DUoS Capacity Costs applied at a level above actual operational need, over £1,700 per year from 1st April 2025.
DUoS + TNUoS Fixed Charges incorporated within the standing charge, over £2,400 per year from 1st April 2025.
Projected DuoS + TNUoS costs exceeded £4,100 per year with the unused capacity providing no operational benefit.
Energunite Capacity Level Reports
Energunite analysed three years of historical HH consumption data to determine the site’s true capacity requirement. This analysis identified a consistent level of unused capacity across each calendar year:
Calendar Year 2023 - 134 kVA of unused capacity
Calendar Year 2022 - 130 kVA of unused capacity
Calendar Year 2021 - 130 kVA of unused capacity
The proposed changes were reviewed by Dominus Property Developments and London Block Management in their capacity as the managing agents. This review confirmed technical and operational suitability.
Energunite Capacity Level Reductions Service
Energunite delivered the Capacity Level Reductions service in line with its standard delivery workflow. This includes:
Agreeing a new connections agreement with the local District Network Operator (DNO) at the revised capacity level.
Updating the DUoS Tariff ID with the relevant Distribution Pricing team.
Informing the electricity supplier of the changes in pass-through charges from the effective date.
Ensuring energy bills were charged correctly by suppliers moving forward.
Informing energy negotiators of correct pass-through charges which are to be agreed during supply contract negotiations.
Reporting the results of the completed works in a tangible report for the Customer to clearly understand.
Monitoring actual savings achieved on a continuous basis where up to date calculations can be provided upon request.
Capacity Level Reductions Result
A 108 kVA reduction was implemented following coordination with all stakeholders. No infrastructure or behavioural changes were required. This delivered savings of over £2,300 per year for the Customer.
The breakdown of savings are as follows:
Capacity level was reduced by 108 kVA effective from 1st October 2024.
DUoS Capacity Costs were reduced by £1,395.47/year for 2025/2026 period.
DUoS + TNUoS Fixed Charge within standing charge were reduced by £957.11/year for 2025/2026 period.
Daily savings will increase further in 2026/2027 as costs continue to rise.
As of January 2026, Vantage Building’s total savings exceeded £3,200 and continue to accrue daily.
Reviewing the Capacity Position of Your Assets
To evaluate the capacity position of one or more buildings within your portfolio and identify potential efficiency improvements, please contact us.