Quick answer: The Wallbox Pulsar Plus does not have a special “running cost” beyond the electricity your EV draws from the wall. Multiply wall energy in kilowatt-hours (kWh) by your charging rate in dollars per kWh. At the EIA’s September 2026 U.S. residential benchmark of 18.2¢/kWh, 300 kWh of home charging costs $54.60. Your local tariff may be much lower or higher, and 40A versus 48A mainly changes charging speed, not the basic price of each kWh.
The important distinction is between power and energy. The Pulsar Plus is Level 2 EVSE: it can supply AC power to the car, but the car’s onboard charger decides how much AC power it can actually accept and converts that AC to DC for the battery. So an 11.5 kW EVSE does not force every EV to charge at 11.5 kW.
What does it cost to charge with a Wallbox Pulsar Plus?
Use the number your utility ultimately bills: energy taken from the house, measured in kWh. The operating-cost equation is simple:
Charging cost = wall kWh × electricity rate ($/kWh)
For a national benchmark, EIA’s September 9, 2026 Short-Term Energy Outlook comparison puts the 2026 U.S. residential retail electricity average at 18.2 cents per kWh. Use your own utility tariff for a personal estimate, especially on time-of-use or demand-based plans.
Worked example 1: 2026 U.S.-average benchmark
Suppose your home charger records 300 kWh delivered from the wall over a month. At the 2026 EIA benchmark:
300 kWh × $0.182/kWh = $54.60 per month.
If your actual utility rate is 12¢/kWh, the same 300 kWh costs $36. If it is 30¢/kWh, the same energy costs $90. That spread is why a national average should never be substituted for your own tariff.
| Monthly wall energy | 12¢/kWh | 18.2¢/kWh benchmark | 30¢/kWh |
|---|---|---|---|
| 200 kWh | $24.00 | $36.40 | $60.00 |
| 300 kWh | $36.00 | $54.60 | $90.00 |
| 400 kWh | $48.00 | $72.80 | $120.00 |
40A vs. 48A: does the faster Pulsar Plus cost more to run?
Not inherently. Wallbox currently offers the Pulsar Plus in 40A and 48A versions. Its North American technical datasheet rates them at 9.6 kW and 11.5 kW respectively on 208/240V Level 2 service. The 40A model can be NEMA 14-50 or hardwired; the 48A model is hardwired. Wallbox also allows the current limit to be configured below the unit’s maximum.
Those ratings describe the EVSE’s maximum capability. Actual AC charging power is constrained by the lowest applicable limit: the EVSE setting, the circuit, and the vehicle’s onboard AC charger. The U.S. Department of Energy explains that the onboard charger converts incoming AC electricity to DC for the traction battery. If an EV can accept only 7.2 kW AC, connecting it to the 11.5 kW Pulsar Plus does not make it draw 11.5 kW.
Worked example 2: same energy, different power
Imagine a charging session that requires 60 kWh from the wall. Ignoring small real-world variations for a moment, 60 kWh at 9.6 kW takes about 6.25 hours; at 11.5 kW it takes about 5.2 hours. At a flat 18.2¢/kWh tariff, either 60 kWh session costs:
60 × $0.182 = $10.92.
The higher amp setting mostly shortens the time needed to move that energy. Price can differ if your utility charges different rates by time, imposes demand-based charges, or if charging losses and vehicle auxiliary loads differ under the two operating conditions. For homeowners troubleshooting unexpectedly slow charging, see why Level 2 charging can run below its headline kW rating.
How should charging losses be included?
If you already know wall kWh, do not add another blanket “10% loss” factor. The wall number already includes the energy consumed by the EVSE, the vehicle’s onboard charger and battery-conditioning or conversion losses that occurred during that session.
If you start with battery-side energy instead, wall energy will be higher because charging is not 100% efficient. There is no single universal loss percentage that is correct for every EV, temperature, state of charge and charging power. EPA’s current fuel-economy and EV-range methodology explicitly says its EV MPGe values include charging losses and assumes Level 2 AC charging, moving the energy measurement back to the wall so it better represents what owners pay for electricity.
Worked example 3: battery energy versus metered wall energy
Suppose the car reports that 60 kWh was added to the battery, but the charging session or whole-home meter shows 66.5 kWh drawn from the wall. For cost math, use 66.5 kWh:
66.5 kWh × $0.182/kWh = $12.10.
Do not replace that measured 66.5 kWh with 60 kWh, and do not add an arbitrary loss percentage on top of 66.5 kWh. When no wall measurement is available, an EPA/FuelEconomy.gov kWh-per-100-mile figure is a useful starting point because EPA says the label methodology already includes Level 2 wall-to-vehicle charging losses.
How much can off-peak charging save?
The Pulsar Plus can schedule charging, and Wallbox specifically promotes scheduling for off-peak hours on its U.S. product page. The savings come from the utility tariff, not from the EVSE creating cheaper electricity.
Worked example 4: TOU peak versus off-peak
Assume a household needs 320 kWh of EV charging in a month. These rates are illustrative, not national averages:
Off-peak at $0.10/kWh: 320 × $0.10 = $32.00.
Peak at $0.28/kWh: 320 × $0.28 = $89.60.
Moving the same 320 kWh to the lower-price window saves $57.60 for that month. A real TOU plan may have multiple windows, seasonal changes or a higher daytime rate that affects the rest of the house, so compare the whole tariff rather than looking only at the EV line item. Home batteries can also shift energy across rate periods, but that is a separate capital-cost decision; see the 2026 home-battery comparison for that tradeoff.
Installation cost is not running electricity cost
Wallbox currently lists the Pulsar Plus at a starting price of $649.99. That hardware price, electrician labor, permits, wiring, conduit, a 240V circuit, outlet work and any service-panel changes are upfront installation costs. They should not be mixed into the monthly electricity calculation unless you are deliberately building a total-cost-of-ownership model.
Installation varies sharply by home. See the hidden costs of adding a 240V EV charging outlet for electrical work, or the Pulsar Plus vs. Tesla Wall Connector comparison for broader hardware tradeoffs.
A practical way to estimate your own monthly cost
- Find your actual charging energy in wall kWh from the EVSE, a reliable energy meter or utility interval data.
- Identify the marginal electricity rate for the hours when charging occurs, including TOU windows if applicable.
- Multiply wall kWh by $/kWh.
- If you only have an EPA kWh/100-mile figure, multiply it by monthly miles divided by 100; EPA’s label methodology already includes Level 2 charging losses.
- Keep hardware and installation spending in a separate ownership-cost calculation.
For example, an EV rated at 30 kWh/100 miles on the EPA label and driven 1,000 miles per month implies about 300 kWh of wall energy under the label’s test methodology. At 18.2¢/kWh, that is again about $54.60 per month. Real driving, weather, HVAC use, speed, tires and charging conditions can move actual consumption above or below the label estimate.
If you would rather not work through the arithmetic by hand, our EV charging cost calculator runs the same steps against residential electricity rates for all 51 states, including the charging losses covered above.
Frequently asked questions
How much does a Wallbox Pulsar Plus cost per month to run?
There is no fixed monthly amount. Multiply the kWh taken from the wall by your actual electricity rate. As a 2026 benchmark, 300 kWh at the EIA U.S. residential average of 18.2¢/kWh equals $54.60.
Does the 48A Pulsar Plus use more electricity than the 40A model?
Not simply because it is rated for more amps. The 48A version can deliver power faster, but if the same EV needs the same wall kWh, the fundamental energy charge is the same on a flat $/kWh tariff. Tariff timing, demand charges and efficiency differences can change the final bill.
Does 11.5 kW mean every EV will charge at 11.5 kW?
No. 11.5 kW is the maximum rating of the 48A Pulsar Plus. The EV’s onboard AC charger and the configured circuit/EVSE limit determine the actual draw. A vehicle with a lower AC acceptance rate will charge at that lower rate.
Should I add 10% for charging losses?
Not as a universal rule. If you have measured wall kWh, losses are already embedded in that number. If you start from battery-side energy, wall energy will be higher, but the difference varies with vehicle and conditions.
Can I use EPA kWh/100 miles to estimate charging cost?
Yes. EPA says its EV fuel-economy methodology includes Level 2 charging losses and reports energy from the wall, so kWh/100 miles can be multiplied by miles driven and your electricity rate for a reasonable benchmark estimate.
Is charging at lower amperage cheaper?
Usually not in a simple flat-rate plan: lower amperage mainly makes charging take longer. It can become cheaper or more expensive if changing the schedule moves charging into a different TOU price window, affects a demand charge, or changes total losses and auxiliary energy use.
Should installation cost be included in “running cost”?
No. Installation and hardware are upfront ownership costs. Running electricity cost is the recurring energy charge: wall kWh multiplied by the applicable electricity rate.