01
What will unmanaged EV charging cost?
Estimate added coincident peak demand charges and compare them with the co-op margin from increased energy sales.
EV Managed Charging Business Case Analysis
Determine whether managed charging creates measurable value for your co-op.
GIM connects forecast EV loads, G&T demand charges, distribution co-op margins, participation and program costs to a complete capital-compatible business case—not just a general estimate of avoided peak demand.
Telematics, AMI and meter-collar strategies · Payback, benefit-cost ratio, NPV and seven-year cash flow
A utility decision model
Answer more than “How many EVs do we need?”
Breakeven enrollment matters, but a defensible business case must also show the cost of doing nothing, the cost and performance of the program, and the financial effect across the entire service area.
02
What will managed charging avoid?
Quantify peak kW shifted, remaining peak exposure, avoided G&T charges and changes in the energy margin.
03
What will the program cost?
Separate platform, communications, hardware, administration, acquisition, marketing and customer incentives.
04
Does the investment meet utility standards?
Calculate levelized annual cost, benefit-cost ratio, payback, NPV, annual cash flow and customer-level metrics.
Connected analytical sequence
From GIM forecasts to a board-ready financial case
Set rates and costs
Enter G&T peak charges, energy margins, technology costs and incentives.
Apply GIM forecasts
Use forecast EV ownership, coincident kW, participation and engagement.
Measure program value
Calculate avoided demand charges, revenue margins and operating costs.
Build investment metrics
Levelize capital costs and calculate payback, B/C ratio, NPV and cash flow.
Compare total outcomes
Include participating and nonparticipating EVs across the service area.
The complete worksheet
One view of inputs, forecasts, program economics and investment results
The current GIM worksheet brings the complete analysis together. Green cells are co-op inputs, yellow cells are managed in the MCCOST worksheet, and GIM supplies the underlying EV and hourly-load forecasts.
- Unmanaged EV peak charges and new co-op revenue margin
- Managed-program kW and kWh benefits
- Annual and one-time program costs
- Levelized cost and net annual benefit
- Payback, benefit-cost ratio, NPV and seven-year cash flow
- Total co-op cost impact of all EVs—with and without a program
Capital and grant compatibility: Results are organized for utility capital analysis and RUS or other federal grant documentation. The utility should confirm specific program requirements and replace placeholder costs with current utility and vendor estimates.
Open the complete full-size worksheet screenshot ↗Visible and adjustable assumptions
Use co-op-specific rates, program costs and participation expectations
The result is only as credible as the assumptions. GIM keeps the most important drivers visible so users can test vendor quotes, alternative incentives and conservative participation cases.
Rates and margins
Reflect the co-op’s actual wholesale and retail economics.
- G&T peak charge ($/kW-month)
- Seasonal and time-period energy margins
- Peak and off-peak charging hours
GIM EV forecasts
Connect the financial case to localized customer and hourly-load forecasts.
- Customers and EV ownership
- Coincident peak kW per EV
- Customers in and outside the program
Technology and control
Compare program delivery approaches instead of assuming one universal cost.
- Telematics defaults supplied
- AMI strategy inputs
- Meter-collar strategy inputs
Participation and engagement
Distinguish enrollment from vehicles actually available and responding.
- EV-owner participation
- Availability and effectiveness
- Peak-load reduction achieved
Administration and acquisition
Include the costs that are often omitted from simplified avoided-cost estimates.
- Design, procedures and training
- Customer acquisition and marketing
- Ongoing administration per EV
Customer incentives
Test the cost of enrollment and retention strategies directly.
- One-time signup credit
- Annual bill credit
- Alternative incentive levels
Cost of inaction versus program value
Start with the economics of unmanaged charging
The example shows why new EV energy sales do not automatically create a positive co-op result. Added G&T peak charges can exceed the new distribution margin unless charging is shifted.
Without managed charging
All forecast EVs contribute to service-area economics without an active charging-control program.
EV peak increase1,918 kW
Additional G&T peak charge$(460,247)
Increase in co-op net revenue margin$246,291
Annual EV net cost$(213,957)
Managed charging program
The program example enrolls 313 EVs, assumes 90% effectiveness and shifts forecast peak charging overnight.
Peak kW moved overnight518 kW
Avoided peak charges$124,267
Annual program benefits$111,869
Annual program costs$(41,614)
Annual program net revenue$70,255
Example calculations use the worksheet assumptions shown in the screenshot. Results will change with the G&T tariff, charging coincidence, co-op margin, participation, engagement, incentives and vendor costs.
Detailed business-case calculation
Translate operating results into investment decision metrics
The worksheet separates one-time and recurring costs, applies a consistent capital-recovery treatment and presents results that management can evaluate.
Classify costs and benefits
Separate fixed one-time costs, annual program costs and annual revenue benefits.
Levelize one-time costs
Apply the selected discount rate and analysis life to convert startup costs to annual equivalents.
Calculate net annual benefit
Subtract annual program and levelized fixed costs from annual benefits.
Calculate decision metrics
Report payback, benefit-cost ratio, per-customer benefit, per-EV benefit and NPV.
Build annual cash flow
Show CapEx, O&M, benefits, net cash flow and cumulative results for each year.
The broader service-area test
Include every EV—not only program participants
A program-only business case can look favorable while ignoring the continuing costs created by EV owners who do not enroll. GIM therefore calculates the total co-op EV impact across the service area, incorporating program benefits and costs, new charging revenue and the G&T charges associated with both participating and nonparticipating EVs.
In the example, managed charging does not eliminate the co-op’s total EV cost because 730 EV owners remain outside the program. It does, however, reduce the annual cost materially.
Additional G&T charge$(335,980)
Increase in co-op net revenue margin$247,182
Annual managed charging cost$(53,707)
Annual EV cost with program$(142,505)
Annual EV cost without program$(213,957)
Illustrative annual improvement from program: $71,452
Retained breakeven analysis
How many enrolled EVs are needed before managed charging pays?
The original analysis remains useful as a sensitivity test. It shows how fixed platform costs are spread across enrollment and why the G&T coincident-demand charge is a primary determinant of the breakeven point.
- At a $26/kW-month G&T charge, breakeven occurred at about 53 enrolled EVs.
- At a $14/kW-month charge, breakeven occurred at about 140 enrolled EVs.
- More enrollment spreads fixed platform costs and improves net benefit per EV.
- Actual thresholds depend on tariffs, charging coincidence, control availability, incentives, administration and vendor pricing.
The important change is context: breakeven enrollment is now one output within the broader GIM business case—not the entire analysis.
Open the original breakeven chart full size ↗Frequently asked questions
What the business case tells a co-op
What is the most important input?
The G&T coincident-demand charge is often the strongest benefit driver, but credible results also require the unmanaged coincident EV load, control effectiveness, participation, energy margin and complete program costs.
Why distinguish program benefits from total EV economics?
The program analysis measures the value created by enrolled EVs. The total-impact analysis also includes nonparticipants, whose unmanaged charging can continue to increase G&T and distribution costs.
Can the worksheet compare technologies?
Yes. Telematics parameters are supplied as defaults, while AMI and meter-collar alternatives can be evaluated using current utility and vendor cost inputs.
Why levelize the one-time costs?
Levelization converts startup and fixed costs into a comparable annual cost using the selected discount rate and analysis period, supporting benefit-cost and capital-planning decisions.
Are the example results a forecast for another co-op?
No. They illustrate the worksheet using one set of rates, forecasts and cost assumptions. Each co-op should use its own tariff, margins, participation expectations and vendor estimates.
Does the analysis include local grid costs?
The managed-charging business case focuses on G&T and program economics. GIM’s distribution grid stress analysis separately screens localized transformer and feeder exposure, which may add further value to managed charging.
Test the business case using your co-op’s economics.
Request a guided demonstration of inputs, technology alternatives, cash flow, decision metrics and total service-area EV impacts.