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Charging a Honda Prologue from empty to full costs roughly $15 to $17 for the energy stored in the battery at representative U.S. residential rates. Including a 10% planning allowance for charging losses, expect approximately $16 to $17 from the wall. Your exact cost depends on your utility rate, starting state of charge, charging losses, and whether you use home or public charging.
The short answer
Charging a Honda Prologue from empty to full costs roughly $15 to $17 for the energy stored in its battery at representative U.S. residential electricity rates. Once normal charging losses are included, a more practical home-charging estimate is about $16 to $17.
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Those figures assume the Prologue’s listed 85-kWh battery and the following residential electricity prices:
- $14.71 for 85 kWh at the 2025 U.S. average residential rate of 17.30 cents per kWh.
- $15.47 for 85 kWh at the U.S. Energy Information Administration’s 2026 residential-price forecast of 18.2 cents per kWh.
- Approximately $16.18 to $17.02 from the wall after adding a clearly labeled 10% planning allowance for charging losses.
The exact amount depends on your utility rate, the starting battery percentage, charging losses, and whether you charge at home or use a public station. Public fast-charging prices are set by the charging network and station tariff, not by Honda.
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Honda Prologue charging cost at a glance
| Charging scenario | Energy calculation | At $0.173/kWh | At $0.182/kWh |
|---|---|---|---|
| Battery-energy portion of a 0%-to-100% charge | 85 kWh | $14.71 | $15.47 |
| Estimated wall cost for a 0%-to-100% charge | 85 kWh plus 10% allowance | About $16.18 | About $17.02 |
| Battery-energy portion of a 20%-to-80% charge | 51 kWh | $8.82 | $9.28 |
| Estimated wall cost for a 20%-to-80% charge | 51 kWh plus 10% allowance | About $9.70 | About $10.21 |
The 17.30-cent figure is the 2025 U.S. average residential electricity price cited in the research for this article. The 18.2-cent figure is the EIA’s 2026 residential-price forecast. Electricity prices vary considerably by state, utility, season, and rate plan, so use your own bill for the most useful estimate.
How to calculate the cost to charge a Prologue
The basic formula is:
Charging cost = electricity drawn from the wall in kWh × your all-in electricity price per kWh
Honda lists an 85-kWh battery for the 2025 and 2026 Prologue. A simple battery-capacity calculation therefore looks like this:
85 kWh × $0.173/kWh = $14.71
That is the cost of 85 kWh of energy going into the battery. It is not necessarily the amount recorded by your electric meter. Charging equipment and the vehicle consume some electricity during the charging process, and the amount varies with the equipment, charging conditions, battery temperature, and other factors.
For a practical estimate without a measured wall-energy figure, add a 10% planning allowance:
85 kWh × $0.173/kWh × 1.10 = approximately $16.18
This 10% figure is a budgeting assumption, not an official Honda-certified loss rate. Charging efficiency is not constant in every situation. Department of Energy material, for example, uses an 85% source-to-battery efficiency assumption in a fast-charging example; that assumption should not automatically be treated as the loss rate for every home Level 1 or Level 2 installation.
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Most owners will not charge from 0% to 100% every day. The cost is proportional to the amount of energy added, at least as a starting estimate.
A 20%-to-80% session adds 60% of the nominal 85-kWh battery capacity:
85 kWh × 0.60 = 51 kWh
At 17.30 cents per kWh, that is approximately $8.82 for the battery-energy portion, or about $9.70 with the 10% planning allowance. At 18.2 cents per kWh, the figures are approximately $9.28 and $10.21, respectively.
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In actual use, the amount can differ because the nominal battery capacity is not necessarily identical to the energy available across the vehicle’s entire displayed state-of-charge range. The starting percentage, battery-management limits, temperature, and charging overhead all matter.
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Honda lists different EPA efficiency ratings for the Prologue’s drivetrains and trims. The EPA uses 33.7 kWh as one gallon of gasoline equivalent, so the MPGe figures can be converted to electricity consumption like this:
kWh per 100 miles = 33.7 ÷ MPGe × 100
| Prologue configuration | EPA combined MPGe | Approx. battery energy per 100 miles | Cost at $0.173/kWh | Cost at $0.182/kWh |
|---|---|---|---|---|
| 2WD | 104 | 32.4 kWh | $5.61 | $5.90 |
| Standard AWD | 99 | 34.0 kWh | $5.89 | $6.20 |
| Elite AWD | 95 | 35.5 kWh | $6.14 | $6.46 |
These are standardized EPA-rating calculations, not a guarantee of real-world cost. Cold weather, cabin heating, air conditioning, high speeds, hills, payload, tire pressure, and driving style can all increase consumption. Honda also cautions that charging time and range vary with battery condition, charger output, vehicle settings, and outside temperature.
How much does it cost to drive 1,000 miles?
Using the EPA-style consumption estimates and assuming every charge takes place at home:
| Configuration | At $0.173/kWh, before losses | At $0.173/kWh, with 10% allowance | At $0.182/kWh, before losses | At $0.182/kWh, with 10% allowance |
|---|---|---|---|---|
| 2WD | About $56 | About $62 | About $59 | About $65 |
| Standard AWD | About $59 | About $65 | About $62 | About $68 |
| Elite AWD | About $61 | About $67 | About $65 | About $71 |
At the 2026 forecast residential rate of 18.2 cents per kWh, a Prologue driver using the EPA-style 32.4-to-35.5 kWh per 100 miles would therefore spend roughly $59 to $65 in battery energy per 1,000 miles, or approximately $65 to $71 from the wall after the 10% planning allowance.
Use your own electricity rate
Replace the electricity-rate assumption in this formula with the rate on your bill:
85 × your price per kWh = battery-energy cost of a full charge
For a rough wall-cost estimate:
85 × your price per kWh × 1.10 = estimated cost including a 10% allowance
| Your electricity price | 85-kWh battery-energy estimate | With 10% planning allowance |
|---|---|---|
| $0.12/kWh | $10.20 | About $11.22 |
| $0.173/kWh | $14.71 | About $16.18 |
| $0.182/kWh | $15.47 | About $17.02 |
| $0.25/kWh | $21.25 | About $23.38 |
Use the marginal or all-in price that applies when the vehicle charges. Depending on how your utility bills electricity, that may mean including delivery charges and other per-kWh charges rather than looking only at the generation line. If you have a time-of-use plan, the relevant rate is the one active during the charging session.
Level 1, Level 2, and DC fast-charging costs
Level 1 charging at 120 volts
The Prologue can use a portable charger with a standard 120-volt outlet. This is convenient when a higher-power circuit is unavailable or as a backup while traveling, but it adds energy relatively slowly. Its cost per kWh is still primarily your home electricity rate; the lower charging speed does not automatically make each kWh more expensive.
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Level 2 charging at 240 volts
Level 2 is generally the more practical home solution for regular Prologue ownership. Honda lists charging at up to 34.1 miles of range per hour, although the actual rate varies with the vehicle, battery state, temperature, and electrical supply.
Honda also describes portable charging from a 240-volt outlet. A permanently installed Level 2 EV charger for Honda Prologue can make overnight charging more convenient, but charger purchase and installation are separate from the electricity cost calculated above. Honda’s 48-amp Home Charging Station requires a dedicated 60-amp circuit and is sold separately. Have the circuit and installation assessed by a qualified electrician; the available charging rate must match the home’s wiring, breaker, and service capacity.
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DC fast charging
Honda lists DC fast charging from 20% to 80% in approximately 35 minutes. Honda also says the Prologue can add approximately 62 to 65 miles of range in 10 minutes, depending on configuration.
Fast charging is priced differently from home charging. A station may charge by:
- Energy delivered, measured in kWh;
- Time connected or charging;
- A session or connection fee;
- A membership-specific rate; or
- A combination of these methods.
There is no honest single nationwide price for a Prologue DC fast-charge session. The correct calculation requires the network, station, location, current tariff, time of use, and any applicable membership or session fees. The amount of energy added also depends on the starting state of charge and the station’s output. Charging from 20% to 80% is not the same as charging from 5% to 80%.
Honda’s 2026 materials identify access to selected Tesla Supercharger locations and other NACS-equipped DC fast chargers with purchase of Honda’s NACS-to-CCS adapter. Availability and compatibility are location- and equipment-dependent, so verify the station in the applicable charging app before making a trip plan. The network’s current tariff—not your household utility rate—determines the electricity price at that station.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why your electric bill may be higher than the battery calculation
An 85-kWh battery does not mean every full charge draws exactly 85 kWh from the wall. The meter can register more because:
- Energy is lost as heat in the vehicle, wiring, and charging equipment.
- The vehicle’s battery-management and charging systems use some energy.
- Temperature management can require additional electricity, particularly in very hot or cold conditions.
- The vehicle may continue using power for connected functions or climate settings.
- The displayed battery percentage and nominal battery capacity do not necessarily map perfectly to energy measured at the outlet.
For a precise personal figure, use a suitable energy monitor or the consumption data provided by your charging equipment, then multiply the measured kWh by the applicable electricity price. Otherwise, the 10% allowance used in this article is a reasonable budgeting convention, not a guaranteed result.
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What range does a full charge provide?
The 2025 and 2026 Prologue use the same listed 85-kWh battery, but EPA range varies by drivetrain and trim:
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- 2WD: 308 miles.
- AWD: 294 miles.
- 2025 and 2026 Elite AWD: 283 miles.
Honda lists 2026 combined ratings of 104 MPGe for 2WD, 99 MPGe for standard AWD, and 95 MPGe for Elite AWD. These figures explain why the AWD versions cost slightly more per 100 miles even though their battery capacity is listed as 85 kWh. Range and consumption in everyday driving can differ from the EPA test results.
Ways to reduce the Prologue’s charging cost
- Charge during lower-rate hours if your utility offers a time-of-use or EV-specific plan. Availability and savings depend on your utility and location; do not assume an EV plan is cheaper without comparing its total rates and fees.
- Use home Level 2 charging for routine driving when the installation cost makes sense for your situation. It is usually more convenient than relying on public fast chargers.
- Reserve DC fast charging for trips or time-sensitive charging. A public fast charger may cost more than home electricity, especially when session fees or premium tariffs apply.
- Keep tires properly inflated and moderate high-speed driving. Speed, tire pressure, temperature, terrain, and cabin climate use affect kWh per mile.
- Compare the station’s live price before plugging in. Check whether the tariff is per kWh, per minute, subscription-based, or subject to a connection fee.
What is not included in these estimates?
The calculations cover the electricity used to charge the vehicle. They do not include:
- The purchase price of a home charger;
- Electrician labor or permits;
- Electrical-panel or service upgrades;
- Public charging-network membership fees;
- Public-station connection or parking fees; or
- Vehicle ownership costs such as maintenance, insurance, financing, depreciation, and taxes.
Installation is particularly important to separate from charging cost. Honda’s 48-amp Home Charging Station requires a dedicated 60-amp circuit and is sold separately. A homeowner should get a site-specific installation quote rather than adding a generic hardware figure to the per-charge estimate.
Bottom line
At representative U.S. residential electricity prices, an 85-kWh Honda Prologue costs about $14.71 to $15.47 in battery energy for a theoretical 0%-to-100% charge. Allowing for electricity drawn from the wall, budget approximately $16.18 to $17.02. A more typical 20%-to-80% session costs about $9.70 to $10.21 using the same 10% planning allowance.
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Frequently Asked Questions
How much does it cost to fully charge a Honda Prologue?
Using the representative U.S. residential rates in this article, an 85-kWh full charge costs $14.71 at $0.173 per kWh or $15.47 at $0.182 per kWh. Adding a 10% planning allowance for charging losses brings the estimates to about $16.18 and $17.02.
How much does it cost to charge a Prologue from 20% to 80%?
A 20%-to-80% charge adds approximately 51 kWh to the nominal 85-kWh battery. That costs about $8.82-$9.28 before losses, or approximately $9.70-$10.21 with a 10% planning allowance at the representative rates used here.
Is public DC fast charging more expensive than charging at home?
There is no universal public-charging price. The cost depends on the network, station, location, tariff, charging speed, membership, and possible session or parking fees. Check the station’s current price before starting a session.
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How can I calculate the cost with my own electricity rate?
Multiply 85 by your electricity price per kWh for a battery-energy estimate. For a rough wall-cost estimate, multiply that result by 1.10 to allow for charging losses. For example, at $0.25 per kWh, the estimates are $21.25 and about $23.38.
The Bottom Line
Expect roughly $16-$17 to charge a Honda Prologue from 0% to 100% at representative U.S. home-electricity rates after a 10% allowance for charging losses. A 20%-to-80% session is roughly $10. Public fast charging must be priced from the specific station’s tariff.
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