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Is an EV Right for Me?
Use the WattPlan for Electric Vehicles tool to help understand whether an electric vehicle could be a good investment for you. EV WattPlan
Residential Single-Family Dwelling
Step 1: Understand charging options
Electric vehicles may be charged at home with various options. An owner may charge the electric vehicle with a Level 1 charging cord provided with most electric vehicles plugged into common household outlet. Or, an owner may opt to purchase and install a quicker Level 2 charging station. If you choose to install a Level 2 station, a licensed electrician and a building permit may be required for any electrical work. Consult a licensed electrician to understand the installation process and impact.
For more on charging options, refer to our EV Basics page.
Step 2: Understand your electric rate options
The rate options available for residential customers with an electric vehicle are described below. Please see the Rate Comparison Summary section below for a side-by-side comparison.
If you remain on the standard residential rate, you can charge your electric vehicle and use your electric appliances on the same rate at any time of day. You do not have to contact your utility.
If you wish to take advantage of lower rates available during daytime, select an option below to understand the enrollment process.
Residential customers may be able to save money using the new time-of-use rates that are lowest during the mid-day period between 9 a.m. – 5 p.m., when solar and other renewable energy is most abundant. Under TOU-RI, customers pay more during the on-peak and off-peak periods.
Enrollment is available for up to 5,000 residential customers of Hawaiian Electric, whether or not the customer has an electric vehicle. Visit our Time-of-Use Program page for additional information and enrollment.
Option 1: TOU-RI for the whole-house
Residential customers may elect to have their household billed under TOU-RI, whether or not they own an electric vehicle. Under this option, customers on TOU-RI pay the lowest price for energy for all their household use, including electric vehicle charging if they have one, between 9 a.m. and 5 p.m. daily. The rate is highest during the peak from 5 p.m. to 10 p.m.
Option 2: TOU-RI, separately metered for electric vehicle charging only
Residential customers may sign up for the time-of-use rate just for electric vehicle charging but keep the rest of their household use under their existing residential rate. The customer will need a licensed electrician to work with the utility to install new service for electric vehicle charging only. This work will require a city building permit.
After the building permit is approved and the new service is installed, the customer can then enroll in the TOU-RI rate and the utility will install a new TOU-RI meter. Customers considering this option should contact the GoEV Team to get more information.
Schedule TOU EV
The TOU EV Rate Schedule was closed to new enrollments in September 2016 but customers currently enrolled may stay on the rate schedule until it expires on September 30, 2021. If a TOU EV customer chooses to leave TOU EV it will not be possible to reenroll.
To avoid surprises, we encourage you to read about our rate options and talk to Hawaiian Electric if you are considering time-of-use rate options.
Step 3: Consult a certified electrician
Customers may charge at home with a Level 1 charging cord plugged into a standard grounded outlet. Older homes without grounded outlets will require an electrical upgrade.
The quicker Level 2 charging station may be equipped to plug into an existing dryer outlet or may require an electrician to install the charging station or a new outlet.
Your EV manufacturer or dealer may recommend an electrical contractor. Request an estimate for any electrical work to install a new outlet, charge station, or upgrades to accommodate the second meter. Each home is different and the initial electrical expenses must be considered against the long-term benefit of the discount rate.
Your contractor will need to obtain a permit for electrical work and contact your utility to complete the installation of new service. To fully understand the potential impact of the second service under Schedule TOU-RI, consider requesting an estimate for the removal of the second service, if this becomes necessary.
Step 4: Enroll in new rate (optional)
If you decide to remain on Schedule R, you are ready to start charging. If you decide to enroll in one of the TOU-RI options, please visit our Time-of-Use Program page for additional information on how to sign up.
Please contact the GoEV Team if you are considering a separately metered service for EV charging only. Enrollment for a new separate meter needs to be approved and cannot be fully installed until required building permits are closed.
Step 5: Meter Change if you enrolled in a new rate
Time-of-use rates require a new meter that can track energy use by time of day. The meter for a separately metered service for EV charging will be installed after all required permits are closed.
Rate Comparison Summary
|Schedule R||Schedule TOU-RI For Whole-House||Schedule TOU-RI For EV Charging Only|
|Description||Household and EV charging rate remains constant around the clock.||Household and EV charging is cheapest during the mid-day.||EV charging through a separate meter is cheapest during the mid-day. Household use remains under the existing rate.|
|Current Status||Open||Open to 5,000 residential customers total||Open to 5,000 residential customers total|
|Electric Meter||Current meter measures household use and EV charging.||Single TOU-RI meter measures household use and EV charging.||Separate TOU-RI meter measures EV charging only. Household use is measured by existing meter.|
|Advantages||For customers unable to shift electric use to daytime, electricity cost is the same all day. NEM credits apply to all residential use including EV charging.||Lower rates for household and EV charging during daytime. The more electrical use shifted to daytime, the greater the savings.||Lower rates for EV charging during mid-day time. The more charging that can be shifted to mid-day, the greater the savings.|
|Disadvantages||No discount for electricity used during daytime when solar and other renewable energy is most abundant.||Higher rates for electric use during peak hours.
Customers with little daytime electric use see little or no savings.
Customers with private rooftop solar generating excess energy during the day may see little or no savings.
|Higher rates for EV charging during peak hours.
Household electric use is not eligible for lower daytime. Household NEM credits cannot be applied to separate EV charging.
|Fixed Customer Charge||Same as Schedule R||Additional Customer Charge for new separate service.|
|Enrollment Requirements||Standard enrollment for residential service.||Enrollment for TOU-RI rate.||EV ownership, building permit for new EV service closed and enrollment for TOU-RI rate. Customer must install second service.|