- Do you understand the case prompt?
- Do you understand what smart meters are?
- What equipment and infrastructure will be required to operate smart metering?
The candidate should ask for additional information where necessary.
The plan should include an initial estimation of the number of meters of each type required, analysis of the relevant costs and sources of cost savings and additional revenues deriving from smart metering. Finally, this should lead to assessment of the feasibility of the project and recommendations going forward.
Assume that the number of domestic dwellings requiring meters will be equal to number of households.
Assume that the population of Ireland is 5m (the actual value is ~4.8m)
Assume that the average Irish household has two members. This is a reasonable average across families and single occupant households.
Number of households is therefore ~2.5m
Number of business premises can be estimated as a function of population.
With an agrarian economy and a lot of other smaller businesses, as can assume that the number of business premises will be 40% of the population.
5 x 0.4 = 2m business premises.
One electricity and one water meter is required per domestic dwelling or business premises.
Therefore, we require 2.5 + 2 = 4.5m each of water and electricity meters.
This is 4.5 x 2 = 9m meters in total.
First, the candidate should break down the various Capex and Opex costs associated with the project. Then they should calculate the relevant values. Capital Expenditure (Capex) - Meters - Telecommunications infrastructure - IT systems Operating Expenditure (Opex) - Maintenance Capital Expenditure - Water meter unit price = €60 Operating Expenditure (per annum) - Meter maintenance = €0.05 per month for each meter
- Electricity meter unit price = €15
- Communications infrastructure = €6 per domestic dwelling/business premises
- IT system cost = €2 per domestic dwelling/business premises
- Installation cost = 20% of total capital expenditure
- Communication maintenance = €0.10 per month per domestic dwelling/business premises
- IT maintenance = 15% of initial IT capex per annum
The candidate should consider some of the ways in which the smart meters might pay for themselves. These might be in terms of cost savings or additional revenue which might be generated via use of the meters.
Cost Savings
- Staff do not need to be employed to read meters at premises.
- Automation of the billing process also saves on staffing and running offices.
- For electricity in particular, total generation capacity and the fraction of that capacity online at any one time is governed by peaks in demand. Better data on the size of such peaks and when they occur will allow for more optimal management and development of the national grid as a whole - potentially saving large sums.
- For the water grid, meter data might make it easier to locate leaks and generally to manage the system.
New Revenue
Whilst most of the advantages of adding smart meters will be in terms of cost savings, there may be ways in which they can generate positive revenue.
One way of doing this is by using the electricity meters to charge different rates at different times of day or week, charging more for electricity at times of high demand. Even if customers change usage to avoid high-cost times, this will save the energy company costs by flattening demand throughout the day or week, reducing the total generation capacity required. This kind of charging will be harder to justify for water, as reservoirs provide such an obvious means of buffering fluctuations in demand at that time scale.
Premium services providing more detailed usage data to the customer themselves, allowing them more insight into their own energy usage.
The Government expects the total savings (across public and private sector) from the combined electricity and water metering project to be €42m per year.
Recall that, to be considered feasible, the project must break even within 10 years.
Compare total savings over 10 years to total costs over 10 years
Total savings = 42x10 = €420m
Total costs = total capex + total opex = 448.2 + (10x9.45) = €542.7m
Total savings - total costs = 420 - 542.7 = -€122.7m
Note the value is negative, therefore the project has not broken even within the required time window and is not feasible in current form.
With the revelation that the metering plan as it stands will not break even within a decade, as required, the candidate should consider alternative courses of action where there will be a positive result within the 10 year time window.
The candidate should be prompted to examine the costs associated with the project - in particular the difference in price between water and gas meter units.
If we do not install water meters, we will save on this substantial cost. From our points above, it also seems that the potential cost savings and new revenue sources are bias towards the electricity, rather than water, grid. As such, we might retain enough of the benefits of smart metering to make this reduced scheme viable.
Calculations
Should they request it, they can also be given the following additional information:
- Installation will now be reduced to 15% of capital expenditure.
- Meter maintenance is reduced to €0.02 per month per meter.
- Total savings and new revenues as a result of smart metering electricity only are €30m per annum.
New total costs = new capex + new opex
New capex = electricity meters + comms infrastructure + IT system + new installation costs
New capex = 67.5 + 27 + 9 + (0.15x67.5+27+9) = €119.03m
New opex = new meter maintenance + comms maintenance + IT maintenance
New opex = (0.02x12x4.5) + 5.4 + 1.35 = €7.83m
New opex for 10 years = 7.83 x 10 = €78.3m
Therefore, new total costs = 119.03 + 78.3 = €197.33m
New net result of smart metering = new savings - new costs
New result = (30x10) - 197.33 = €102.67m
Note that the outcome of implementing electricity-only smart metering is both positive and relatively large.
The candidate should give a brief, top-down, executive summary of their conclusions and the rationale underpinning them. This should be as clear and structured as possible and consider both the cost and revenue side of smart meter roll-out.